ZECO VALVE GROUP CO., LTD.

Flow Control Valve(2022年09月29日)

zecovalve — 2022-09-29T12:59:49+0900

https://www.zhengfengvalve.com/products/flow-control-valve/

This valve maintains a predetermined flow, limits excessive flow to a predetermined value, and reduces upstream pressure to downstream pressure. Even if the upstream pressure of the main valve changes, it will not affect the downstream flow.

Features of China Flow Control Valve

Convenient installation and use.

The control part has no complex electric sensing mechanism and is not prone to failure.

The setting is simple, and the adjustment function will be completed automatically after setting.
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No manual operation or other power source is required.

Flow Control Valve Working Principle

The flow value in the pipeline is controlled by the change of the opening size of the main valve disc and can be stabilized at a set value. The size of the main disc switch and the opening is controlled by the size of the pilot valve. The media pressure is taken from the downstream side of the throttle plate plus the spring force and the pressure taken from the upstream side of the throttle plate acted on the lower part of the diaphragm respectively. When the flow rate and pressure on both sides of the throttle orifice plate change, the pressure acting on the lower part of the diaphragm Will no longer balance, the diaphragm deformation, the opening of the guide valve change, and the opening of the main valve will also change accordingly so that the flow in the main road will return to the original set value.
Installation and Commissioning of Flow Control Valve

A gate valve and a filter should be installed before the main valve, and a gate valve should be installed after the main valve for maintenance. The guide valve has been adjusted before delivery. If the set flow value is not suitable for the field requirements, the guide valve adjusting screw can be adjusted For specific use, please consult ZECO Valve Group.
Flow Control Valve Material and Standard
Size Range: 2-24
Pressure Rating : 10bar-25bar
Face to Face Dimensions: AMSE B16.10, EN558-1
Flange End Dimension: AMSE B16.1/16.42, AS4087, EN1092-2
Coating: Fusion Bonded Epoxy Coating
Inspection and Test: ISO 5208 / EN 12226-2
PartMaterialStandard
BodyDuctile IronEN 1563/DIN 1693
BonnetDuctile IronEN 1563/DIN 1693
TrimStainless Steel 431EN10088-1/ASTM A959
SeatStainless Steel 431EN10088-1/ASTM A959
DiaphragmEPDM / NBRISO 4633
Pilot ValveStainless Steel 431EN10088-1/ASTM A959
For the materials options not listed, consult factory.
ZECO manufactures valves in more than 50 different alloys.

ZECO Valve Group is an experienced flow control valve supplier. We provide china valve, building water shut off valve, 2 inch flow control valve, constant flow control valve, etc. Contact us to know more about flow control valve installation and balancing valves flow control.

Dynamic Balancing Valve(2022年09月29日)

zecovalve — 2022-09-29T12:57:31+0900

https://www.zhengfengvalve.com/products/dynamic-balancing-valve/

Festures of Dynamic Balancing Valve

No external energy is required for automatic flow regulation;

utomatically adjust equipment or pipeline flow to meet the required design flow;
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No need for balance debugging before the system runs;
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Keep pipe flow constant.
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Dynamic Balancing Valve Working Principle

When the pressure difference control range is above, the valve tank is completely compressed, and the cross flow area is only the minimum design channel, and the flow rate changes with the pressure difference. When the pressure difference is within the control range, the valve tank moves with the pressure difference, thus changing the flow area and keeping the flow at the set value. Under the pressure differential control range, the valve is fully extended to reveal the maximum over current area, and the flow rate changes with the pressure difference.
Dynamic Balancing Valve Installation and Commissioning

This valve is mainly used for flow regulation and hydraulic balance. It can not be used as a shutoff valve because there is a certain amount of leakage when it is closed. For specific use, please consult Zeco Valve Group.
Dynamic Balancing Valve Material and Standard
Size Range: 1/2"~2"
Pressure Rating: 10bar ~ 16bar
Face to Face Dimensions:EN 558-1, ASME B 16.10
Flange End Dimension: BS 21
Inspection and Test: ISO 5208 / EN 12226-2
PartMaterialStandard
BodyCuZn39Pb1 / C37000EN12167/ASTM B135
BonnetCuZn39Pb1 / C37000EN12167/ASTM B135
TrimCuZn39Pb1 / C37000EN12167/ASTM B135
Measuring PortCuZn39Pb1 / C37000EN12167/ASTM B135
O-RingEPDM / NBRISO 4633
HandwheelNylonISO 4633
For materials options not listed, consult factory.
Zeco manufactures valves in more than 50 different alloys.

ZECO Valve Group is an experienced china valve supplier. We provide valve china, building water shut off valve, butterfly valve, flow design balancing valves, automatic flow balancing valve, etc. Contact us to know more.

Ductile Iron Gate Valve(2022年09月29日)

zecovalve — 2022-09-29T12:56:03+0900

https://www.zhengfengvalve.com/products/ductile-iron-gate-valve/

Features of ductile iron sluice valve
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Visual valve switch easily;
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Quick opening and closing, light torque;
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Brass nut wear-resistant, long switch life;
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Fully covered with EPDM disc, resistant to corrosion.

Ductile rising spindle gate valve Working Principle

Turn the handwheel to open and close the valve disc connected with the stem through the thread of the handwheel and the stem.
Ductile Iron Gate Valve Installation and Commissioning

This valve is usually placed in a higher position from the ground. Pay attention to the installation space in use. When opened, the stem will rise a certain distance. For specific use, please consult ZECO Valve Group.
Ductile Iron Gate Valve Material and Standard
Size Range: 2"~24"
Pressure Rating: 10bar ~ 25bar
Face to Face Dimensions: AMSE B16.10, EN558-1
Flange End Dimension: AMSE B16.1/16.42, AS4087, EN1092-2
Coating: Fusion Bonded Epoxy Coating
Inspection and Test: ISO 5208 / EN 12226-2
PartMaterialStandard
BodyDuctile IronEN 1563/DIN 1693
BonnetDuctile IronEN 1563/DIN 1693
StemStainless Steel 431EN10088-1/ASTM A959
WedgeDuctile Iron + EPDM / NBREN 1563/ISO 4633
NutCuZn39Pb1 / C37000EN12167/ASTM B135
HandwheelDuctile IronEN 1563/DIN 1693
For the materials options not listed, consult factory.
ZECO manufactures valves in more than 50 different alloys.

As a valve manufacturer. We provide building water shut off valve, water valve, rising stem gate valve, fm gate valve, etc. Contact us to know more.

Double Orifice Air Release Valve(2022年09月29日)

zecovalve — 2022-09-29T12:55:19+0900

https://www.zhengfengvalve.com/products/double-orifice-air-release-valve/

This valve is a pipeline will be matched equipment, apply to the temperature does not exceed 100 ℃ water, hot water pipe on the pipe from the air.

Festures of Double Air Release Valve

Body is provided with a shock-proof inner tube to protect the float；
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Lower water pressure can be closed to prevent drainage；
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When there is negative pressure, the piston quickly opens to breathe；
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Stainless steel floating ball, long life.
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Double orifice air valve Working Principle

This valve exhaust, buoy, by gravity pull down one end of the lever, the lever in the tilt state at this moment, in the leverage and vent contact appeared gap, air through the vent through the gap, with the air discharge, water level rise, buoy under the effect of the buoyancy of water float upwards, the lever on the seal face pressure on the porosity, gradually until the vent is completely blocked. The exhaust valve is now completely closed.

Double Orifice Air Release Valve Installation and Commissioning
When installing the double ball air valve, always install a protective valve on the front end to avoid stopping water from being tested. For specific use, please consult ZECO Valve Group.
Double Orifice Air Release Valve Material and Standard
Size Range: 2"~12"
Pressure Rating: 10bar ~ 25bar
Face to Face Dimensions: AMSE B16.10, EN558-1
Flange End Dimension: AMSE B16.1/16.42, AS4087, EN1092-2
Coating: Fusion Bonded Epoxy Coating
Inspection and Test: ISO 5208 / EN 12226-2

ZECO Valve Group is an experienced china valve manufacturer. We provide building water shut off valve, control valve, double acting air release valve, etc. Contact us to know double orifice air valve function.

Differential Pressure Control Valve(2022年09月29日)

zecovalve — 2022-09-29T12:52:35+0900

https://www.zhengfengvalve.com/products/differential-pressure-control-valve/

Differential control valve is a kind of valve, which makes use of the pressure change of medium itself to adjust itself to keep the pressure difference of the controlled system unchanged. Differential pressure valve plays the role of the branch road, automatic regulation of household, elimination of heat network and hydraulic imbalance.

Festures of Differential Pressure Control Valve

Accurate and stable pressure difference control；
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20-250Kpa Pressure difference control range;
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Simple debugging, without complex electrical installation;
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Long life and durability.
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DPCV valve Principle

P1 is the pressure of water supply, P2 is the pressure of backwater in the valve and P3 is the pressure of backwater outside the valve. When P1-P3 increases, the induction diaphragm moves the disc upward, reducing the flow area and increasing P2-P3, thereby maintaining P1-P2 constant, i.e. the pressure difference on the control system remains unchanged. Conversely, if P1-P3 decreases, the disc will move down, P2-P3 will decrease, and P1-P2 will remain unchanged. If P1-P3 remains unchanged, and the resistance within the controlled system changes, such as P1-P2 increases, the disc opens slightly, so that P2 returns to its original value, that is, P1-P2 remains unchanged. Therefore, this valve can adjust the pressure changes in the system outside the controlled system.

DPCV is the backwater installation method. The control pipe is connected with the connection of the water supply pipe. External type: connected with the supply pipe at the front end of the controlled system and connected with the preset control interface of the copper guide valve at the end; The pressure difference control valve and balance valve are used together. The balance valve is responsible for flow measurement, shutoff, and connection of the pressure pipe. For specific use, please consult ZECO Valve Group.
Differential Pressure Control Valve Material and Standard
Size Range: 2"~12"
Pressure Rating: 10bar ~ 25bar
Face to Face Dimensions: AMSE B16.10, EN558-1
Flange End Dimension: AMSE B16.1/16.42, AS4087, EN1092-2
Coating: Fusion Bonded Epoxy Coating
Inspection and Test: ISO 5208 / EN 12226-2
PartMaterialStandard
BodyDuctile IronEN 1563/DIN 1693
BonnetDuctile Iron + C37000EN 1563/EN12167
TrimStainless Steel 431EN10088-1/ASTM A959
SeatStainless Steel 431EN10088-1/ASTM A959
DiaphragmEPDM / NBRISO 4633
SpringStainless Steel 431EN10088-1/ASTM A959
For the materials options not listed, consult factory.
ZECO manufactures valves in more than 50 different alloys.

ZECO Valve Group is an experienced china valve supplier. We provide building water shut off valve, gate valve, etc. Contact us to know differential pressure control valve price and differential pressure control valve function.

Want to know the details of differential pressure valve operation, please visit our website.

Combination Air Valve(2022年09月29日)

zecovalve — 2022-09-29T12:51:29+0900

https://www.zhengfengvalve.com/products/combination-air-valve/

Combination air release vacuum valve is used is installed at the outlet of the pump or in the water supply pipeline to eliminate air accumulated in the pipe, so as to improve the service efficiency of the pipe and the pump. When negative pressure is generated in the pipe, the valve will immediately suck in external air to prevent damage to the pipe due to negative pressure.

Festures of Combination Air Valve
Suction at negative pressure；
Fast exhaust；
Exhaust only does not drain；
Slight exhaust and large.
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Combination Air Valve Working Principle

When tube began to water injection, the disc in the open position, a large number of exhaust, when the air line up, the full of water in the valve, floating ball up and drive the valve closed, stop the exhaust, when water tube is normal transportation, if there is a small amount of air within the valve to a degree, water levels fall in the valve, floating ball drops, the air is being exhausted from the holes. When the pump stops, the water flow in the pipe is empty or negative pressure is generated in the pipe. At this time, the plug is opened quickly and the air is inhaled to ensure the safety of the pipe.
Combination Air Valve Installation and Commissioning

Combination air release valve is usually installed at the highest point of the system, such as tightening the bonnet on the valve body, the air valve stops the exhaust, normally, the bonnet should be open. Air valve can also be used with the block valve, convenient exhaust valve maintenance. For specific use, please consult ZECO Valve Group.
Combination Air Valve Material and Standard
Size Range: 2"~8"
Pressure Rating: 10bar ~ 25bar
Face to Face Dimensions: AMSE B16.10, EN558-1
Flange End Dimension: AMSE B16.1/16.42, AS4087, EN1092-2
Coating: Fusion Bonded Epoxy Coating
Inspection and Test: ISO 5208 / EN 12226-2
PartMaterialStandard
BodyDuctile IronEN 1563/DIN 1693
BonnetDuctile IronEN 1563/DIN 1693
Exhaust HoodDuctile IronEN 1563/DIN 1693
Float BallStainless Steel 431EN10088-1/ASTM A959
StrainerStainless Steel 431EN10088-1/ASTM A959
SealEPDM / NBRISO 4633

For the materials options not listed, consult factory.
ZECO manufactures valves in more than 50 different alloys.

Want to know the details of check valve, contact us.

Air Valve(2022年)

zecovalve — 2022-05-26T15:55:12+0900

https://www.zhengfengvalve.com/products/air-valve/

Each of ZECO's single air release valve and double orifice air relief valve in water line are high-quality combination air relief valve for water systems, suitable for various sewage and wastewater systems and operating conditions. ZECO's air release valve uses an irregular round stainless steel ball, each of which has been tested under pressure of more than 40kg. Compared with the hollow plastic ball, it is easier to withstand the instantaneous pressure when the pump is lifted and prevent the ball from collapsing under pressure. Below are our hot sale valves and feel free to contact us for air valve price.
Functions of Air Valve
When the system is under pressure, the air valve can discharge a small amount of air and gas effectively; When the system is emptied, the air balance valve sucks in a lot of air. Each adopts the advanced design in line with gas dynamics, with fast inlet and exhaust port, automatic micro exhaust port and waterproof hammer device. The air relief valve avoids air and gas accumulation, water hammer and pressure fluctuation, and has a good sealing performance at low pressure. There are typical application cases in every working condition, such as sewage and wastewater system pump station - discharge air, avoid forming negative pressure and prevent water hammer. Sewage and wastewater system pipes - prevent air and gas from accumulating at the high points of the pipes, the turning points of the slopes and the road/river intersections, eliminate negative pressure, prevent the formation of negative pressure where water column separation is easy to occur in the system, and prevent pressure fluctuations and water hammer; Municipal and industrial wastewater treatment plants - prevent air and gas accumulation and negative pressure. Therefore, under any working condition, using the exhaust valve of Zeco, we have the corresponding configuration strategy to meet the requirements of our customers.
Water Control Solutions
ZECO has professional solutions to optimize water usage, reuduce costs and maximize energy efficiently.

As an experienced air release valve supplier. We provide china valve, air release valve pdf, air valve pdf, air valve malaysia, control valve etc. Contact us to know air release valve working principle or more.

water valve(2022年)

zecovalve — 2022-05-26T15:54:44+0900

https://www.zhengfengvalve.com/products/

The water valve is mainly used for water pipe, including water supply and drainage system, the sewage treatment system, HVAC system, heating system, etc. In the water valve, the middle and low-pressure valves are widely used, especially the low-pressure large diameter valves, and the middle-pressure valves are less. Similar to the resilient gate valve, the rubber lined butterfly valve is the most basic and most widely used valve. As a professional water valve manufacturer in China, ZECO has a wide range of application cases in major water supply companies, heating companies, and business groups worldwide. These cases include solving extreme conditions for users, including being in normal operation for 20 years.
Water Valve Material
Water valves are usually made of ductile iron, stainless steel, and copper. ZECO select raw material strictly and believes that we can provide you with the best quality materials, the safest water valves.

How Water Valves Work

Water valve is a general description for ZECO water valve series products including different kinds of water valves as below:
1. Diaphragm type hydraulic control valve:
ZF100X Remote control float valve - For controlling water level of water tower or pool, applicable for automatic water supply system of various water pools/tanks, water towers ect..
ZF200X Pressure reducing valve - For adjusting and controling the main valve outlet pressure, applicable for drinking water supply, fire-fighting system, industrial water supply and irrigation.
ZF400X Flow control Valve - The valve is applicable for installation on water distribution pipeline where require flow control to maintain a preset flow rate.
ZF500x Pressure reducing/retaining valve - The valve is for pressure reducing/retaining purpose, when pressure in water supply pipeline is over preset value, the valve open to reduce the pressure, when pipeline pressure in below preset value, the valve close to retain the pressure.
2. ZFZ45X Resilient gate valve -The valve is applicable for installation in various kinds of pipeline for open/close fucntion.
3. ZFD71X Centerlined butterfly valve -The valve is applicable for cutoff or flow adjusting purpose.
Water Valve FAQs
QWhat is the difference between gate valve and butterfly valve?A
Gate valve can only be used for open/close purpose but butterfly valve can be used for both open/close and flow adjusting purpose.

QHow much does it cost to replace a water valve?A
It depends on type, size, pressure, material of water valve.

QHow long do water valves last?A
It depends on working condition of water valves, usually it can works 2~20 years.

QCan a gate valve be repaired?A
The gate valve can be repaired but it's better to replace a new gate valve.
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As one of the experienced water valve suppliers. We provide valve in chinese, domestic gate valve, non return valve for water line, different water valves etc. Contact us to know types of water main valves or water valve sizes.

HVAC Valve(2022年)

zecovalve — 2022-05-26T15:54:18+0900

https://www.zhengfengvalve.com/hvac/

Systematic waterpower balance is very important for the Buildings & Construction industry, ZECO provides superior solutions for HVAC systems with various valves including double regulating valves(DRV), pressure independent control valves(PICV), and pressure difference control valves which help solve the Constant water supply, noise and maintenance considerations, integration and control, and high water consumption issues.

As one of the experienced water valve suppliers. We provide hvac gate valve, hvac water valve, heating air release valve, hvac water regulating valve, hvac prv, hvac actuator valve, hvac pressure relief valve, central heating air release valve, check valve, etc. Contact us to know more.

Fire Protection Valve(2022年)

zecovalve — 2022-05-26T15:53:29+0900

https://www.zhengfengvalve.com/fire-protection/

Fire protection system has very strict requirement for valves, the valve has to be reliable in performance and having big flow to make sure it works stable when fire happens. Zeco fire air release valve are specially designed for fire protection system and been tested in various kinds of harsh working conditions. Choosing Zeco fire protection valve is choosing reliable.

As one of the experienced water valve manufacturers. We provide butterfly valve in fire fighting, pressure relief valve for fire fighting system, butterfly valve, etc. Contact us to know types of valves used in fire fighting system or more.

Building & Construction Valve(2022年)

zecovalve — 2022-05-26T15:49:58+0900

https://www.zhengfengvalve.com/building-construction/

Zeco building valves&construction valves like gate valve, butterfly valve and control valve series are widely used in different projects like air port, hospital, hotel ect..
By servicing the market with reliable quality for over 30 years, Zeco has earned a good reputation and become an appointed brand for different projects in building valve&construction sector.

ZECO Valve Group is an experienced china valve supplier. We provide building water shut off valve, main water shut off commercial building, gate valve, etc. Contact us to know more.

Water Control Solutions(2022年)

zecovalve — 2022-05-26T15:49:34+0900

https://www.zhengfengvalve.com/application/

ZECO valves are designed to control hot water, cold water, drinking water, sea water

and wastewater in a variety of different industrial sectors. Valves are an integral part of various building systems, stopping or starting the flow, throttling and controlling the flow.
Types of valves used in hydraulic system and knife edge gate valve application
ZECO Waterworks valves used in water supply are suitable for prolonged underground and outdoor use in demanding conditions and are maintenance-free.

ZECO HVAC valves control the flow balance and stabilise the differential pressure to achieve energy savings in HVAC systems.

ZECO Building & Construction valves are widely used in commercial buildings and are used by the majority of well-known commercial companies and commercial buildings in China.

ZECO Fire Protection valves are able to cope with the emergency water piping needs of firefighting, guaranteeing the timely supply of water for firefighting and preventing the safety and stability of firefighting lines.

ZECO Oil & Gas Valve are used by oil companies in various countries and plays an important role in the safety and proper operation of oil pipelines.

ZECO Valve Group is an experienced china valve manufacturer. We provide china valve, control valve, etc. Contact us to know more.

Working Principle Of Three Piece Ball Valve(2022年05月26日)

zecovalve — 2022-05-26T15:19:52+0900

https://www.zecovalve.com/working-principle-of-three-piece-ball-valve.html

The working principle of the three-piece ball valve is as follows:

I. opening process
In the closed position, the ball is pressed on the valve seat by the mechanical pressure of the valve rod. When the handwheel is turned anticlockwise, the valve rod moves in a reverse direction, and the angle plane at the bottom of the valve rod makes the ball free from the valve seat. The valve rod continues to lift and interacts with the guide pin in the screw groove of the valve rod so that the ball starts to rotate without friction. Until it reaches the fully open position, the valve rod is lifted to the limit position, and the ball rotates to the fully open position.

II. Closing process
When the valve is closed, rotate the handwheel clockwise, and the valve stem starts to lower and the ball starts to rotate when it leaves the valve seat. Continue to rotate the handwheel, and the valve rod is affected by the guide pin embedded in the spiral groove on it so that the valve rod and the ball can rotate 90 ° at the same time. Near closure, the ball has rotated 90 ° without contact with the seat. In the last few turns of the handwheel, the angle plane at the bottom of the valve stems mechanically wedges against the ball to press it tightly on the valve seat to achieve complete sealing.

As one of the most professional china check valve manufacturers, we provide group valve, international standard valve and etc. Contact us to know more.

What's the Difference between Trunnion and Floating Ball Valve?(2022年05月26日)

zecovalve — 2022-05-26T15:19:24+0900

https://www.zecovalve.com/what-is-the-difference-between-floating-ball-valve-and-trunnion-mounted-ball-valve.html

Choosing the right ball valve is a deciding part of your project. Trunnion mounted ball valve and floating ball valve are two of the most common ball valves. Each of them has its own characteristics and advantages. Knowing the difference between floating and trunnion ball valve will help you choose the best one for your project.

1. Trunnion Type Ball Valve
1.1 What is Trunnion Mounted Ball Valve
Trunnion Mounted Ball Valve is one type of ball valves, which is also called fixed ball valve. The ball of the trunnion mounted ball valve is fixed and it does not move when pressed. Trunnion Mounted Ball Valves are equipped with a floating seat. Under the action of the medium pressure, the seat will move to make the sealing ring tightly press on the sphere to ensure sealing. Bearings are usually installed on the upper and lower shafts of the sphere, and the operating torque is small, which is suitable for high pressure and large diameter valves.

1.2 Trunnion Mounted Ball Valve Assembly
The valve is usually assembled with the valve body as the reference part, in the order and method specified by the process. Before assembling, check the parts and components to avoid the parts that are not deburred and cleaned from entering the final assembly. During the assembly process, the parts should be handled with care to avoid bumping and scratching the processing personnel. The wrench used for tightening should not be too long to prevent the pre-tightening force from being too large and affecting the bolt strength. After the final assembly is realized, the control mechanism should be rotated to check whether the movement of the valve opening and closing parts is mobile and whether there is jamming.

1.3 Trunnion Ball Valve Design
The trunnion ball valve adopts the upper and lower stem fixed valve core (shaft support type) and movable sealing seat design, which is more stable in working. With the automatic compensation function, there is a great shear force and self-cleaning function when there is no gap between the two-way sealing valve seat. It is especially suitable for the on-off of fibers, suspensions with tiny solid particles, and viscous media.

1.4 Trunnion Mounted Ball Valve Characteristics and Performance
Trunnion mounted ball valves are suitable for various pipelines of medium and high pressure. They are used to cut off or connect medium in the pipeline. Different materials are selected. They can be applied to water, steam, oil, liquefied gas, natural gas, gas, nitric acid, acetic acid, oxidizing medium, urea, and other media respectively. They are widely used in the petrochemical industry, electric power, water conservancy, and other industries. The common driving modes of trunnion mounted ball valves are worm wheel drive, manual, electric, and pneumatic. Most trunnion mounted ball valves are flanged, but there are also trunnion mounted ball valves in welded form.

2.Ball Valve Floating Type
2.1 What is Floating Ball Valve
Floating ball valve is another type of ball valves. The ball of the floating ball valve is floating, and the valve seat is fixed. Under the action of the medium pressure, the ball can produce a certain displacement and press tightly on the sealing surface of the outlet end to ensure that the outlet end is sealed.

2.2 Floating Ball Valve Assembly
(1) Clean and check the removed parts. It is strongly recommended to replace the valve seat and valve cover gasket with spare parts kit.
(2)Assemble in the reverse order of disassembly.
(3)Tighten the stem nut by using specified torque.
(4)After installing the control mechanism, input the corresponding signal to drive the valve core to rotate by rotating the valve stem to make the valve in the open and close position.

2.3 Floating Ball Valve Design
The floating ball valve has a simple structure and good sealing performance. However, the load of the sphere which bears the working medium is all transmitted to the outlet sealing ring. Therefore, it is necessary to consider whether the sealing ring material can withstand the working load of the sphere medium. When it is under higher pressure impact, the sphere may shift. As a result, this structure is generally used for medium and low-pressure ball valves. That's why the transparent plastic pipe is designed and often used with clear PVC fittings, which make it easy to check where leakage happens. It is also important to choose a reliable clear PVC pipe manufacturer.

2.4 Floating Ball Valve Characteristics and Performance
The overall characteristics of ball valve floating type are small size, lightweight, simple structure, a sphere with free-floating function to better ensure sealing. The ball valve uses a ball with a circular through the hole as the opening and closing part, which rotates 0-90 degrees around the center of the stem under the drive of the valve stem to complete the opening and closing function. It has the characteristics of compact structure and fast switching. It can turn 90 degrees to close the valve and cut off the pipeline medium. The diameter of the spherical passage is the same as the diameter of the pipeline. The flow resistance is small and the flow capacity is large. The valve stem is downloaded, which prevents the accident of the valve stem penetration and ensures the safety of use.

ZECO is one of the most professional china globe valve manufacturers, we provide international standard valve, sw gate valve and etc. As a Valve company, ZECO valve company developed our own laboratory for research & development for international standard valve design innovation and vertification, which includes PT, MT, UT, FE test. ZECO is the humble and united team, to be more diligent and progressive to show the itegrity to our clients.

What is the Difference Between Ball Valve and Butterfly Valve in Structure and Performance?(2022年05月26日)

zecovalve — 2022-05-26T15:18:56+0900

https://www.zecovalve.com/what-is-the-difference-between-ball-valve-and-butt.html

1. Ball valve and butterfly valve
Ball valve and butterfly valve are two kinds of valves which are most widely used in today's valves. They are easy to operate and play a role of cut-off and cut-off for pipeline medium.

The ball valve is mainly used to cut off, distribute and change the flow direction of the medium in the pipeline. It can be closed tightly with only 90 degree rotation and a small rotation torque. There are many kinds of classification. According to function, it can be divided into bypass valve, air valve, pressure relief valve, blowdown valve, etc.; according to transmission, it can be divided into pneumatic ball valve, electric ball valve, hydraulic ball valve, pneumatic ball valve, electric hydraulic ball valve, turbine driven ball valve, etc.; according to shell / main material, it can be divided into metal material valve, metal body lining valve, non-metal material valve, etc.

Butterfly valve, also known as flap valve, is a simple control valve, mainly composed of valve body, valve rod, butterfly plate and sealing ring. The valve body is cylindrical with short axial length and built-in butterfly plate. There are also many classifications. According to the driving mode, it is divided into electric butterfly valve, pneumatic butterfly valve, hydraulic butterfly valve, manual butterfly valve, etc.; according to the structural form, it is divided into central sealing butterfly valve, single eccentric sealing butterfly valve, double eccentric sealing butterfly valve, three eccentric sealing butterfly valve, etc.; according to the working pressure, it is divided into vacuum butterfly valve, low-pressure butterfly valve, medium pressure butterfly valve, high-pressure butterfly valve, ultra-high-pressure butterfly valve, etc. According to the connection mode, it can be divided into wafer type butterfly valve, flange butterfly valve, lug butterfly valve, welding butterfly valve, etc.

2. Difference

Different structure

In terms of the structure, the biggest difference between them is the opening and closing parts. The opening and closing parts of the butterfly valve are a plate, while the opening and closing parts of the ball valve are a ball. The flow of the butterfly valve can be adjusted through the opening degree, but the ball valve can not be adjusted.

Butterfly valve is composed of four parts: valve body, valve seat, valve plate and valve rod. Its accessories are exposed and can be seen by eyes. While ball valve is composed of valve body, valve core (a round ball) and valve rod. The valve core is in the valve body and only some parts of it can be seen by eyes.

The tightness and caliber are different

The characteristics of the butterfly valve are fast opening and closing speed, simple structure and low cost, but the tightness and pressure capacity are not good. The ball valve can quickly open and close, and can achieve complete sealing under high pressure and temperature. So in comparison, the sealing performance of the ball valve is better than that of the butterfly valve. However, due to the limitation of volume and opening and closing resistance, the ball valve is difficult to achieve a large diameter, and the structural principle of the butterfly valve is particularly suitable for making large diameter valves.


The use temperature and withstand voltage are different

From the point of view of service temperature, due to the sealing material and structure, ball valve is not suitable for steam medium, while butterfly valve can be used for conventional saturated steam medium for heating (below 350 ℃).
The structure of butterfly valve is relatively simple, and butterfly valve is generally used for low pressure, while the structure of ball valve is relatively complex, more resistant to high pressure.


Operating torque

In terms of operating torque, the butterfly valve is a three eccentric metal seal butterfly valve, so its opening and closing torque is very small. With the increase of the diameter of the ball valve, the contact area of the sealing surface also increases squarely, so the opening and closing torque of the large diameter ball valve will be very large.

ZECO is a professional Valve supplier, we provide group valve, international standard valve and etc. Contact us to know more.

What are the Structure Types and Advantages of Floating Ball Valve?(2022年05月26日)

zecovalve — 2022-05-26T15:18:31+0900

https://www.zecovalve.com/what-are-the-structure-types-and-advantages-of-floating-ball-valve.html
At present, there are many ball valve structures and specifications in our market, and new products and structures are emerging. The ball valve for sale can be divided into many types according to its main characteristics and applications.

The specific support mode of ball valve structure can lead to obvious change of ball valve structure, which directly affects the performance and use. When designing a ball valve, we usually determine the support mode of ball valve structure according to the requirements, fluid pressure, diameter and working temperature, and then a more suitable sealing structure can be selected.

The main feature of floating ball valve is that the ball has no supporting shaft, and the ball is mainly supported by the valve seat between the inlet ends and outlet ends of the valve. Moreover, the valve rod and the ball are movably connected, so the ball of this ball valve structure is mainly clamped between the two seats and presents a "floating" state. The ball can be directly driven by the handle or other driving devices through the valve rod, and can rotate between two valve seats.

The main advantages of the floating ball valve that is widely used are simple structure, low cost, convenient manufacturing, safe and reliable work, so it has been widely used in various fields. Moreover, the sealing performance of the floating ball valve structure is directly related to the fluid pressure. Under the same conditions, generally speaking, the higher the pressure is, the easier it is to be sealed. The converse is also true. However, we should consider whether the material of the valve seat can withstand the load transmitted by the housing. The main force generated by the pressure of the fluid on the ball structure will all be transmitted to the valve seat.

In addition, for the floating ball valve of a relatively large diameter, when the pressure is high, the operating torque will increase, and the weight of the ball is also relatively large. It will cause that the direct distribution of the pressure generated by the self-weight on the sealing surface of the valve seat is relatively uneven. Generally speaking, the upper half-circle of the horizontal plane along the diameter of the channel is smaller and the lower half-circle is larger, which will directly lead to uneven wear of the valve seat and finally cause leakage.

Finally, we must apply a certain preload between the ball and the base so that the floating ball valve structure can also have good sealing performance under low working environment pressure. If the preload is insufficient, the sealing of the material can not be guaranteed. However, if the preload is too large, the friction torque between the ball structure and the valve seat will also increase, which may directly lead to irreversible plastic deformation between the valve seat materials and destroy the sealing performance.

Zeco is one of the most professional and reliable floating ball valve manufacturers in China. If you have any questions or want to buy our products, please leave a message or write an email via sales@zecovalve.com.

ZECO is a professional Valve factory, we provide gate valve manufacturers china, international standard valve and etc. Contact us to know more.

The Prospect of Valve in Oil & Gas Industry(2022年05月26日)

zecovalve — 2022-05-26T15:18:02+0900

https://www.zecovalve.com/the-prospect-of-valve-in-oil--gas-industry.html

Today, the global oil and gas industry is growing slightly, and international energy is still dominated by fossil energy. The overall international oil price is rising, but the oil price is volatile and the oil supply is excessive. Global gas production and consumption are growing in tandem. Guided by policies, many developing countries, including China, have accelerated the construction of large-scale projects in the fields of oil refining, natural gas, coal, and chemical industry, and upgraded their overall production capacity. At the same time, the backward production capacity will inevitably be eliminated.
As the oil and gas industry speeds up the construction of large-scale projects, valves in the ball valve oil and gas industry will further develop in the direction of high-parameter large scale. With the strict control of equipment price by users, the localization process of key valves in the oil and gas industry will be further accelerated, and the valves with high sulfur content, high-pressure hydrogen flow, wear resistance and corrosion resistance, high-pressure oxygen and other harsh conditions will be fully localized, and users will put forward higher requirements for the long-term reliable operation of valves. With the continuous improvement of the environmental protection requirements of the international community, the microleakage of the valve will increase the higher requirements, the valve structure design without external leakage, the valve stem packing seal reliability will be more attention.

ZECO is a professional Valve manufacturer, we provide china forged ball valve, international standard valve and etc. Contact us to know valve price or more.

Modulating Float Valve(2022年03月24日)

zecovalve — 2022-03-24T15:33:02+0900

https://www.zhengfengvalve.com/products/modulating-float-valve/

Features of modulating float valve
Stable and reliable work, large flow

Disc fast open and slow closed, no water hammer impact

Good sealing effect and long service life

Install at any location along with the height of the water tank and the working space.

Modulating Float Valve Working Principle

When the pipe supplies water from the inlet end, because the needle valve, ball valve, and float ball valve are normally open, water enters the water tank through the micro-filter, needle valve, control room, ball valve, and float ball valve. At this time, there is no pressure in the control room; When the water level of the water tower rises to the set height, the ball float closes the ball float valve, controls the indoor water pressure rise, pushes the main valve to close, and the water supply to stop. When the water level drops, the float valve reopens, the water pressure in the control room drops, and the main valve opens again to continue the water supply, keeping the setting height of the liquid level.

Modulating Float Valve Installation and Commissioning

Horizontal installation is preferred for remote-controlled ball float valve. The main valve and ball float pilot valve can be remotely installed as a whole. This valve is installed in the water system and debugged. The globe valve is opened. The main valve needle valve is opened for 2 to 4 rounds. The ball valve is fully opened. For specific use, please consult Zeco Valve Group.

Modulating Float Valve Material and Standard

Size Range: 2"~24"

Pressure Rating: 10bar ~ 25bar

Face to Face Dimensions: AMSE B16.10, EN558-1

Flange End Dimension :AMSE B16.1/16.42, AS4087, EN1092-2

Coating: Fusion Bonded Epoxy Coating

Inspection and Test: ISO 5208 / EN 12226-2

As a reliable china valve manufacturer, we have types of high quality gate valve for sale, if you have needs, please contact us.

Metal Seated Gate Valve(2022年03月24日)

zecovalve — 2022-03-24T15:32:21+0900

https://www.zhengfengvalve.com/products/metal-seated-gate-valve/

Features of Metal Seated Gate Valve

The stem is permanently sealed by three independent seals, and if the seal wears out after long use, the gland bolts only need to be tightened

Stem spherical stop-thrust, low friction resistance, so that the valve is light to open and close, low operating torque

Major stem O-ring can be replaced with pressure in the pipe

Epoxy resin sprayed on the inner and outer surface of the product, not easy to corrode.

Metal Seated Gate Valve Working Principle

Metal Seated gate valve vs resilient seated gate valve, Usually both can be used on the water pipeline, reilient seated gate valve more for clean water pipeline, because the granular medium will cause damage to the rubber of the gate, while the metal seated gate valve is more widely used, the hardness of the bronze seat makes in the granular medium can also be very good to achieve the sealing effect and service life will not be greatly affected. But the metal seated gate valve production cycle is longer, the use of higher costs, so the choice between the two or according to the working conditions of the media conditions and budget to choose.

Metal Seated Gate Valve Installation and Commissioning

Metal seated gate valve in the pipeline does not require frequent maintenance, depending on the time of use, the stem O-ring can be replaced periodically to reduce the possibility of leakage. For specific use, please consult Zeco Valve Group.

Metal Seated Gate Valve Material and Standard

Size Range: 2"~64"

Pressure Rating: 10bar ~ 25bar

Face to Face Dimensions: AMSE B16.10, EN558-1

Flange End Dimension: AMSE B16.5, AS4087, EN1092-2

Coating: WRAS approved Fusion Bonded Epoxy Coating

Inspection and Test: ISO 5208 / EN 12226-2

As a reliable valve manufacturer, we have types of high quality check valve for sale, if you have needs, please contact us.

Manual Balancing Valve(2022年03月24日)

zecovalve — 2022-03-24T15:31:51+0900

https://www.zhengfengvalve.com/products/manual-balancing-valve/

Festures of balancing valve in chilled water system

Straight flow structure, low fluid resistance

Handwheel display the number of opening cycles for easy debugging

Valve inlet and outlet have self - sealing test

Valve disc self-balancing design, open and close is not affected by pipeline pressure, can be closed completely.

Manual Static Balancing Valve Working Principle

By changing the clearance between the valve core and valve seat (opening), adjust Kv valve flow capacity (valve) to change the flow resistance of flow through the valve in order to achieve the purpose of flow adjustment, the role of the object is the resistance of the system, eliminate the resistance unbalance phenomenon in the system, thus to new water allocation proportion according to the design and calculation of balance, each branch in proportion to increase or decrease at the same time.

Manual Balancing Valve for Domestic Hot Water Installation and Commissioning

There are two methods of selection. The first is to use the software for calculating positive moisture content. The design flow Q and the design pressure difference ∆P are input to obtain the size and balance pre-set position of the balance water valve. In order to obtain better accuracy, it is recommended that the positioning of the balance valve be at 50-90% of the opening degree; Secondly, when the design flow Q is known and the design pressure difference ∆P is known, the Kv value can be calculated by the formula, and then the proper balance valve size and predetermined parameters can be selected from the Kv value table. For specific use, please consult ZECO Valve Group.

Manual Balancing Valve Material and Standard

Size Range: 2"~16"

Pressure Rating: 10bar ~ 25bar

Face to Face Dimensions: AMSE B16.10, EN558-1

Flange End Dimension: AMSE B16.1/16.42, AS4087, EN1092-2 Coating: Fusion Bonded Epoxy Coating

Inspection and Test: ISO 5208 / EN 12226-2

As one of manual balancing valve manufacturers, we have different types of valve china for sale, if you have needs, please contact us.

If you want to know more about manual balancing valve function, please visit our website.

Lug Butterfly Valve(2022年03月24日)

zecovalve — 2022-03-24T15:31:22+0900

https://www.zhengfengvalve.com/products/lug-butterfly-valve/

Features of fully lugged butterfly valve
Low opening torque, Radial dynamic balance sealing system is adopted, so that the forces on both sides of the inlet and outlet of the disc are roughly balanced

Self lubricating bearing to reduce operating torque and avoid locking the valve in chinese stem infrequent opening and closing conditions

Better Seal ring material, seal is made of stainless steel sheet with graphite/carbon fiber/PTFE, etc. More wear-resistant, impact-resistant, reliable, and environmentally friendly than rubber asbestos sheet materia

Packing-combined sealing system, ensure that the maximum leakage of the valve can reach ≤20ppm. The dynamic sealing structure can be used if necessary so that the packing seal is in good condition and the free maintenance period of the packing is extended.

Lug Butterfly Valve Working Principle

Semi lug type butterfly valve has two options of fixed seat and floating seat, which can be repaired without leaving the site, which can shorten the repair time and greatly improve the efficiency. Fixed seats are suitable for valves where the medium flows forward, so the seal is only for one direction and the flow direction should be noted when installing. Although the valve seat is fixed, the sealing of the valve flap can still be removed. If the valve has a floating seat, it can be installed in any direction.

Lug Butterfly Valve Installation and Commissioning

Wafer lug type butterfly valve should be stored in a dry, ventilated room, and the valve channel should be blocked at both ends. Long-term storage of the valve should be regularly inspected and cleared of dirt. Special attention should be paid to the cleaning of the sealing surface to prevent damage to the sealing surface. For specific use, please consult Zeco Valve Group.

Lug Butterfly Valve Material and Standard

Size Range: 2"~48"

Pressure Rating: 150LB ~ 300LB

Face to Face Dimensions: API 609, EN558

Flange End Dimension: EN1092, ASME B16.5, ASME B16.47, AS2129

Inspection and Test: API 598

Knife Gate Valve(2022年03月24日)

zecovalve — 2022-03-24T15:30:48+0900

https://www.zhengfengvalve.com/products/knife-gate-valve/

Knife Edge Gate Valve Specification
Features of Knife Gate Valve

Full bore design for high media throughput capacity

U-shaped gasket with good sealing effect

Gate plate with gate function, good shut-off effect, can effectively shut off all kinds of debris in the media, to solve the leakage phenomenon after shut-off containing lumps, particles and fiber media

Able to work in dirty media, easy to install, easy to disassemble, easy to maintain, without removing the valve can replace the valve seals, making valve maintenance more simple.

Knife Gate Valve Working Principle
The wiper between the valve body and bonnet of the knife gate valve china prevents solid particles from entering the bonnet. The valve body cavity, seat configuration and slant gate design provide features to impede the entry of thick media (e.g. pulp, slurry) or solid media (e.g. granules and powders).

Knife gate valve gate and seat are always in close contact with the sealed valve, the gate with a guide hole with the same through conduit gate control valve, the gate has a through diameter size of the round hole, through the gate opening and closing so that the round hole on the gate and the through diameter to do a complete disengagement and coincide with the action. In addition, the advantage of the structure is that the valve body diameter without grooves, the medium will not be blocked, and has a full diameter flow characteristics, suitable for the use of powder and particle media in the pipeline. Its sealing structure can be divided into soft seal, hard seal structure. Sealed valve seat is designed with movable structure, with anti-wear and automatic compensation function, thus longer life.In the process of closing and opening the valve seat and the gate plate have been close to the movement, so that the valve opening and closing force is stable.

If you want to know more about knife gate valve installation orientation, please refer to knife gate valve dimensions pdf, and download it.

As the pneumatic knife gate valve suppliers, we have types of china valve for sale, if you have needs, please contact us.

Gate Valve(2022年03月24日)

zecovalve — 2022-03-24T15:30:16+0900

https://www.zhengfengvalve.com/products/gate-valve/

The resilient seated big size gate valve of ZECO is widely used and reliable in the water supply and drainage system of water supply company, sewage company, and various industries in big cities of China. Established in 1991, at that time we are the only gate valve manufacturers in china, and it is the Chinese market to introduce and the earliest development and production of cast iron gate valve China manufacturers,and already known in the field of water gate group valve production for more than decades, although the market of other China gate valves are very common and the price is low, but the durability and reliability, we believe that our deep research and development and rich production experience are the foundations why we are one of trusted wedge gate valve suppliers of our customers.

Types of Gate Valve

Resilient Seated Gate Valve
Ductile Iron Gate Valve
Metal Seated Gate Valve
Knife Gate Valve

If you want to know more about gate valve types and sizes, please visit our website.

Differential Pressure Control Valve Working Principle(2021年)

zecovalve — 2021-11-29T12:24:00+0900

https://www.zhengfengvalve.com/products/

Differential pressure control valve working principle

The differential pressure control valve does not need any external energy. It can automatically adjust by relying on the pressure change of the regulated medium itself, automatically eliminate the flow change caused by the residual pressure head and pressure fluctuation of the pipe network, and keep the pressure difference between the user's inlet and outlet constant. It is especially suitable for household metering or automatic control system, which is conducive to stable system operation.

The differential pressure China control valve is of double disc structure, with small unbalanced force and compact structure. It is used in the heating (air conditioning) water system to keep the differential pressure of the controlled system constant. According to the differential pressure control valve working principle, users who install the differential pressure control valve do not install the automatic control device. Under the minimum working pressure difference, when the selected pipe diameter is too large and the resistance is reduced, the flow will be too large, which will inevitably cause the hydraulic imbalance of the external network and increase the energy consumption.

The differential pressure control valve is composed of valve body, valve cover, valve core spring, control conduit and pressure regulator.

The valve is installed on the return pipe of the heating pipeline, and the working chamber on the valve is connected with the water supply pipe through the control pipe. Eliminate the flow deviation caused by the pressure fluctuation of the external network. When the water supply pressure P1 increases, the water supply pressure difference P1-P3 increases. The pressure sensing membrane drives the valve core down to close the small valve port, so that P2 increases, thus maintaining the constant P1-P2. When the water supply pressure P1 decreases, the pressure sensing membrane drives the valve core to move up and P2 decreases, so that P1-P2 is constant. No matter how the pressure changes in the pipeline, the dynamic differential pressure balance valve can maintain the constant pressure and flow applied to the controlled object.

Self-operated Differential Pressure Control Valve Working Principle：

After the process medium is throttled by the valve, it enters the controlled equipment, and the differential pressure of the controlled equipment is respectively introduced into the upper and lower membrane chambers of the valve, generating thrust in the upper and lower membrane chambers, and balancing with the spring reaction force, so as to determine the relative position of the valve core and the valve seat, while the relative position of the valve core and the valve seat determines the size of the differential pressure value. When the controlled differential pressure changes, the balance of the force is destroyed, which drives the movement of the valve core, and the movement of the valve core changes the resistance coefficient of the valve, that is, the controlled differential pressure value is controlled as the set value. This is the working principle of the differential-pressure-control-valve.When the differential pressure setting value needs to be changed, the adjusting nut can be adjusted.

We also have various types of gate valve for sale, if you have any needs, please contact us.

Classification of Balance Adjustment Control Valves(2021年)

zecovalve — 2021-11-29T12:23:37+0900

https://www.zhengfengvalve.com/news/classification-of-balance-adjustment-control-valves.html

Balanced trim control valve is usually divided into static balance valves, dynamic flow balance valves and dynamic differential pressure balance valves.

A. Static balancing valves are also called manual balancing valves, digital locking balancing valves, and butterfly balancing valves and so on. They change the opening of the valve core and seat to change the flow resistance of the valve in order to achieve the purpose of regulating the flow. Their function is to balance the flow of water according to the designed proportion, increase and decrease the branches at the same time in proportion, and still meet the current climate needs of part of the load flow. Quantity demand plays a role of heat balance.

B. Dynamic flow balance valve is also called self-operated flow control valve, self-operated balance valve, constant flow valve, automatic balance valve, etc. The self-operated flow control valve automatically changes the resistance coefficient according to the change of system working condition. Within a certain range of pressure difference, it can effectively control the flow through and maintain a constant value. That is, when the pressure difference between the front and the back of the valve increases, that the flow through the action of small automatic closure of the valve can keep the flow constant. On the contrary, when the pressure difference decreases, the valve opens automatically and the flow remains constant. However, when the pressure difference is smaller or larger than the normal working range of the valve, it can not provide additional pressure head after all. At this time, the flow of the valve to the full open or closed position is still lower or higher than the set flow.

C. Dynamic differential pressure balancing control valve, also known as self-operated differential pressure control valve, differential pressure controller, voltage regulator synchronizer, differential pressure balancing valve, etc. It uses differential pressure to adjust the opening of the valve, and uses the change of pressure drop of the valve core to compensate for the change of pipeline resistance, so as to keep the differential pressure basically unchanged when the working condition changes. Its principle is within a certain flow rate range, and it can be effective. Controlling the pressure difference of the controlled system is constant, that is, when the pressure difference of the system increases, it can ensure that the pressure difference of the controlled system increases through the automatic closing action of the valve. On the contrary, when the pressure difference decreases, the valve opens automatically and the pressure difference remains constant.

If you really want to know more details of classification of control valves,please click our website.

As a China valve supplier, we will attempt to produce more high quality products for our customers.

Characteristic and Principle of Automatic Flow Control Valve(2021年)

zecovalve — 2021-11-29T12:23:06+0900

https://www.zhengfengvalve.com/news/characteristic-and-principle-of-automatic-flow-control-valve.html

The automatic flow valve is a kind of valve that controls the flow rate of the throttle by changing the hydraulic resistance of the throttle under a certain pressure difference so as to regulate the movement speed of the actuator (hydraulic cylinder or hydraulic motor). It mainly includes throttle valve, speed regulating valve, overflow throttle valve and diversion collector valve. Installation form is horizontal installation.

Product features of automatic flow control valves
The automatic flow control valve is a kind of multi-function valve which adopts high precision pilot mode to control flow. It is suitable for pipes with flow and pressure to be controlled in distribution pipes, keeping the predetermined flow unchanged, limiting the excessive flow to a predetermined value, and reducing the upstream high pressure appropriately. Even if the upstream pressure of the main valve changes, it will not affect the downstream flow of the main valve. Flow control valve selection: can be selected according to pipeline diameter. It can be selected according to the maximum flow rate and the flow range of the valve.

The working principle of automatic flow control valve:
The structure of the digital flow control valve is composed of an automatic spool, a manual spool and a display. The display part is composed of flow valve core, sensor transmitter and electronic calculator display.Its work is extremely complex. The measured water flow passes through the valve, impacts the impeller in the flow core, rotates the impeller and senses the transmitter, so that the sensor sends out a signal proportional to the flow. The flow signal is sent to the electronic calculator through the wire. After calculator calculation and microprocessor treatment, the flow value is displayed.Manual spool is used to regulate the flow, according to the display value to set the required flow value. Automatic spool is used to maintain constant flow, that is, when the pressure of the pipe network changes, the automatic spool will automatically open a large fire and close a small valve to maintain the set flow value unchanged under the action of pressure.

As one of the China check valve manufacturers, we sincerely hope to cooperate with you to push the manufacturing and application of Chinese valve products to a new stage.

Balancing Valve Working Principle(2021年)

zecovalve — 2021-11-29T12:22:46+0900

https://www.zhengfengvalve.com/news/balancing-valve-working-principle.html

Self balancing valve is a dynamic and static balancing valve under hydraulic conditions. Such as static balance valve, dynamic balance valve.
Valve body material: cast iron, cast steel,Work pressure is 0.6-4.0 MPA.
The working temperature is - 5 C - 350 C.
Valve caliber DN15-DN300,Connection mode: flange, internal
Driving mode: manual and electric.
Manufacturing standard: national standard.

How do balancing valve working?
Balancing valve function is special. It has good flow characteristics. Besides, it has valve opening index, opening locking device and pressure measuring valve for flow measurement. By using special intelligent instrument, the flow value flowing through the balance valve can be directly displayed by inputting the valve type and opening value according to the measured pressure difference signal. As long as the balance valve with appropriate specifications is installed in each branch and user's entrance and debugged once with the special intelligent instrument, the flow rate of each user can reach the set value.

Static balancing valves are also called balancing valves, manual balancing valves, digital locking balancing valves, double regulating balancing valve, etc. It is through changing the clearance between the spool and the seat (opening), to change the flow resistance through the valve in order to achieve the purpose of regulating flow. Its object of action is the resistance of the system, which can distribute the new water in proportion to the design calculation, increase and decrease the branches in proportion at the same time, still meet the flow demand of part of the load under the current climate needs, and play the role of heat balance. Dynamic balancing valves are divided into dynamic flow balancing valves, dynamic differential pressure balancing valves, self-operated differential pressure control valves and so on.

Dynamic flow balance valve is also called self-operated flow control valve, self-operated balance valve, constant flow valve, automatic balance valve, etc. It automatically changes the drag coefficient according to the change of system working condition (differential pressure). In a certain range of pressure difference, the flow through can be effectively controlled to maintain a constant value, that is, when the pressure difference before and after the valve increases, the flow through the valve can be maintained by the action of automatic closing small. On the contrary, when the pressure difference decreases, the China control valve opens automatically and the flow rate remains constant. However, when the pressure difference is smaller or larger than the normal working range of the valve, it can not provide additional pressure head after all. At this time, the flow rate of the valve to the full open or closed position is still lower or higher than the set flow rate can not be controlled.

Dynamic differential pressure balancing valve, also known as self-operated differential pressure control valve, differential pressure controller, constant voltage variable synchronizer, differential pressure balancing valve, etc. It uses differential pressure to adjust the opening of the check valve, and uses the change of pressure drop of the valve core to compensate for the change of pipeline resistance, so as to keep the differential pressure basically unchanged when the working condition changes. The differential pressure control valve working principle is that in a certain flow range, it can effectively control the constant pressure difference of the controlled system, that is, when the pressure difference of the system increases, it can ensure that the pressure difference of the controlled system increases by automatically closing the valve. When the pressure difference decreases, the valve opens automatically, and the pressure difference remains constant. The self-operated pressure difference control valve has an automatic plug closing state within the control range. The pressure difference between the two ends of the valve exceeds the preset value. The plug opens automatically and adjusts the opening automatically under the action of the pressure sensitive film to keep the pressure difference between the two ends of the valve relatively constant.

If you want to know more information about the purpose of balancing valve, please visit our website.

Butterfly Valve(2021年)

zecovalve — 2021-11-29T12:22:24+0900

https://www.zhengfengvalve.com/products/butterfly-valve/

ZECO is one of a professional control valve manufacturers China and butterfly valve is main products series of ZECO valve. The rubber lined concentric butterfly valve is widely used in various kinds of operating conditions because compare to other valves it cost lower and required installation space is smaller. Centerlined butterfly valves are usually used in water supply pipeline.

Types of Butterfly Valve

Wafer Butterfly Valve
Flanged Butterfly Valve
Lug Butterfly Valve

What is a butterfly valve?

Butterfly valve is a kind of adjusting valve of simple body construction, can be use for open/close or flow control purpose for low pressure pipeline.The shutter for butterfly valve is a round plate, disc open/close centre to valve stem which is the center line of valve body as well.Butterfly valve can be used in various kinds of application like water, waste water, seawater, air, mud, oil and corrosive service ect.. In many kinds of low pressure pipeline of shuoff/flow adjusting application, butterfly valve can be used to replace gate valve, globe valve or ball valve which would save the cost for user.Butterfly valve is available for quick open/close, easy to operated, low flow resistance and suitable for high frequency open/close. ZECO centerlined butterfly valve is bi-directional for seat sealing can be installed at either direction of pipeline, sealing performance is reliable and the rubber seat is replaceable.

Butterfly Valve Selection Guidance

Butterfly valve, especially centerlined butterfly valve is ually made of ductile iron body, which means the valve is suitable for low pressure pipeline but not suitable for high pressure pipeline. To choose a suitable butterfly valve, we need to consider below factors:Size and pressure, due to it's advantage of simple contruction, butterfly valve are available of big size till 120" or even much bigger. It should be noticed that the bigger butterfly valve size is, the lower pressure it can bear. So, big size butterfly valve can only be conisdered for low pressure pipeline.Most common used material for centerlined butterfly valve body is ductile iron, carbon steel may also be used as body material for some specific application.Centerlined butterfly valve don"t have individual seat, the seat is lined on the internal body.While choosing seat material for concentric butterfly valve, we should consider the temperature, fluid medium and pressure, commonly used seat material are EPDM, NBR, NR ect..The most important part for choosing butterfly valve is to choose its disc material, for example, water and waste water can use ductile iron disc with nickel plated, seawater can use al-bronze as disc material, ect..Stem of centerlined butterfly valve don"t have contact with the fluid, so we don"t have to consider the corrosion issue, so normal martensitic stainless steel is enough.

Water Control Solutions

ZECO has professional solutions to optimize water usage, reuduce costs and maximize energy efficiently.

Water Valve(2021年)

zecovalve — 2021-11-29T12:21:58+0900

https://www.zhengfengvalve.com/products/

Stretch Technology
As one of the professional control valve manufacturers in China, SUNGOD has recently developed new products based on Stretch Technology.

It combines the synthetic stretch fabrics with bi component based on expanded PTFE porous membrane and through special lamination processing forming the laminated fabric with stretch technology, offering basically high breathability and waterproofness, but also high stretch and recoverable property.

Stretch fabric lamination is suggested to be used at the joint part like shoulder, oxter, elbow. It allows the wearer to act more comfortably and flexibly, which effectively helps the wearer maintain passion and concentration for work, mission, or sports.

Water Valve Types

Water Valve Material
Water valves are usually made of ductile iron, stainless steel, and copper. ZECO select raw material strictly and believes that we can provide you with the best quality materials, the safest water valve.

How Water Valves Work

Water Valve FAQs
QWhat is the difference between gate valve and butterfly valve?A
Gate valve can only be used for open/close purpose but butterfly valve can be used for both open/close and flow adjusting purpose.

QHow much does it cost to replace a water valve?A
It depends on type, size, pressure, material of water valve.

QHow long do water valves last?A
It depends on working condition of water valves, usually it can works 2~20 years.

QCan a gate valve be repaired?A
The gate valve can be repaired but it's better to replace a new gate valve.

If you want to know anything about non slam check valve definition, please visit our website.

Globe Valve / Check Valve(2021年11月25日)

zecovalve — 2021-11-19T18:17:55+0900

https://www.zecovalve.com/products/globe-valve-check-valve/

ZECO Valve Group is established in 1991, as a industrial valve manufacturer in Shanghai, China. We have 5 valve factories in China, which are located in Shanghai, Yancheng and Wenzhou, which mainly produce and supply wedge gate valves, through conduit gate valves, floating ball valves, trunnion mounted ball valves, globe valve made in china, swing check valves, swing check valves, dual plate check valves and forged steel valves.

ZECO is a professional check valve supplier. Globe valve is a type of forced sealing valve, which can close the valve without leakage by applying pressure to the disc. The media flow direction of the globe valve can be from the top down or from the bottom up. From the bottom up means that the media flow from the bottom of the disc, this time the need to close the dual plate check valve china force than open the valve, stem diameter is also large, because the operation needs to overcome the influence of the medium resistance, otherwise the stem will be bent by the pressure of the medium. From the top down means that the medium flow from the top of the disc, this time the need to close the valve is smaller than the opening of the valve, sealing also because of the relationship between the medium resistance is more closely, so usually, high-pressure conditions will be used in this way.

Globe Valve by ZECO Company
ZECO china wafer check valve is an automatic type valve, which can be divided into lifting check valve and swing check valve china according to the movement mode of the disc, or wafer check valve, flange check valve and welded check valve according to the connection mode. Check valve will usually indicate the direction of flow in the valve body, when the pressure of the imported medium is greater than the weight of the disc, the disc is pushed open by the medium, the valve also opens. On the contrary, when the imported medium pressure is less than the weight of the disc, the disc is also closed, the valve is also in the closed state. When combined with globe valve, check valve 6 inch price can play a role of safety isolation. The disadvantage is high resistance, poor sealing when closing.

Gear Operated Gate Valve(2021年11月24日)

zecovalve — 2021-11-19T18:17:08+0900

https://www.zecovalve.com/products/gear-operated-gate-valve.html

Description of Gear Operated Gate Valve:
ZECO gear operated gate valve is defined according to the driving mode. Gear operated gate valve is mainly used for large-diameter gate valve. Because of the large torque, it is almost impossible to open the valve by manual operation. ZECO, as a Chinese manufacturer of gear operated gate valve dimensions, can design and manufacture the gear units to be waterproof for outdoor use according to customers' requirements.ZECO gear operated gate valve is available in carbon steel series, stainless steel series, alloy steel series and low temperature steel series. As an expert in industrial pipeline valve solutions, ZECO specializes in designing and manufacturing industrial valves to assure customers of quality.

Features of Gear Operated Gate Valve:
1. ZECO gear operated gate valve adopts the top-mounted stem nut design, because the corrosion situation of outdoor, the handwheel is probably the most easy to corrosion damage of parts, and in replacing the handwheel, ZECO design can ensure the stem and disc in the condition of open valve, even can't fall off the handwheel, ensure the valve in the pipeline in the process of maintaining the normal use;
2. The packing of ZECO gear operated gate valve is made of flexible graphite material, and its sealing performance is very reliable after nearly 30 years of use. But also according to the requirements of the user, the choice of packing ring and grease structure to ensure that the valve stem seal;
3. The stem of ZECO gear operated gate valve is connected to the gate by a t-groove, which allows the gate to be automatically corrected and sealed normally if it is offset by medium impact;
4. The casting of ZECO gear operated gate valve has been strictly inspected by the inspection department to ensure that all materials can meet international standards and make users feel more assured in use.

Material of Gear Operated Gate Valve:
NoPartMaterial
1BodyASTM A352 LCB
2Seat RingASTM A182 F304 + STL
3WedgeASTM A352 LCB + STL
4StemASTM A276 304
5Bonnet GasketGraphite + SS304
6Bonnet BoltASTM A193 B8
7Bonnet NutASTM A194 8
8BonnetASTM A352 LCB
9BackseatASTM A182 304
10Stem PackingReinforced Graphite
11Gear ActuatorASTM A352 LCB

Gear Operated Ball Valve(2021年11月24日)

zecovalve — 2021-11-19T18:16:39+0900

https://www.zecovalve.com/products/gear-operated-ball-valve.html

Description of Gear Operated Ball Valve:
Large size ball valve if adopt manual operation will reduce the efficiency of personnel, even if many people help may also be because of the large size of excessive torque can't open or close the valve, so the large-diameter ball valve ZECO basically adopts the gear operation, the gear can drive way through the gear structure greatly reduce open or close the valve torque, could have been three operations may be only one operation can be completed. In addition, ZECO can manufacture turbo heads with waterproof grade or full spray coating according to customers' requirements.

Features of Gear Operated Ball Valve:
1. ZECO gear operated valve has a stem anti - fly out design. In ball valve need to change the packing or for corresponding maintenance, need to clear the packing gland, in order to prevent the discharged gland, the stem will be hurt by pressure within the lumen and top fly to maintenance personnel, ZECO in a setting on the stem for stem convex in gland place, no matter how much lumen pressure stem fly out burst damage will not happen;
2. The connecting parts of the valve body and the left body of ZECO ball valve are cushion seals. In order to prevent the sealing leakage caused by fire, high temperature or vibration, ZECO designed the connection between the valve body and the left body as metal and metal contact, forming a flange to ensure no external leakage;
3. ZECO gear operated ball valve is designed with anti-static device. When the ball valve in the process of opening or closing, non-metallic materials on the surface of the ball and seal friction generating electrostatic, such as static medium is derived and the line is combustible materials will be very serious incidents, so ZECO design on the stem and ball anti-static device, composed of spring and the metal ball, which can be produced by electrostatic export the valve body;
4. ZECO gear operated ball valve is designed to be fire protection. In case of fire, non-metallic materials such as packing and seat or some materials with low ignition point will be seriously burnt down and lead to serious leakage and expansion of fire situation. The fire-proof structure of ZECO can ensure that after these non-metallic materials are burned down, the leakage can be prevented through the metal seal of the ball and valve body to ensure the normal operation of the pipeline.

Material of Gear Operated Ball Valve:
NoPartMaterial
1BodyASTM A216 WCB
2BonnetASTM A216 WCB
3BallASTM A105
4SeatASTM A105 + PTFE
5StemASTM A182 F6a
6Anti-static DeviceSS304
7GasketGraphite + SS304
8BoltASTM A193 B7
9NutASTM A194 2H
10O-ringViton A
11Gear OperationASTM A216 WCB

Gate Valve(2021年11月23日)

zecovalve — 2021-11-19T18:15:59+0900

https://www.zecovalve.com/products/gate-valve/

ZECO is one of the professional gate valve manufacturing companies, specializing in the production of wedge gate valve and through conduit gate valve products, two types of API 6D production for nearly 30 years, ZECO technology also with China valve association secretary-general of the general and technical consultants are in the same year, other disciples which brought ZECO very powerful technical support, have also brought ZECO to interact with the technology of the Chinese valve association is very frequent, and it is why a solid technical force, ZECO obtained also have 30 a few related gate patents, participate in national valve standards there are 10 items. Among those pneumatic gate valve suppliers, ZECO valve provides high-quality products with a reasonable get valve price and deserves trust!

Gate Valve For Sale List By Form
According to the structural form, the gate valve can be divided into Wedge gate valve, through conduit gate valve, slab gate valve, and industrial gate valve. The structure difference is distinguished by the wedge, the wedge and seat of wedge gate valve are degrees, generally, 3 degrees, 5 degrees, the wedge and seat of through conduit gate valve are parallel, through the medium pressure from floating seat or wedge to seal.

Gate Valve For Sale List By Drive Mode
The drive mode of the gate valve can be divided into manual, pneumatic and electric, gear operated and motorized. The choice of operation mode is mainly based on the requirements of clients. ZECO can configure the operated actuators and brands required by clients.

Gate Valve For Sale List By Material
When selecting the valve body material of the gate valve, the material should be determined according to the actual conditions of working conditions such as temperature, pressure & medium. Body materials of ZECO gate valves include, but are not limited to stainless steel, wcb, carbon steel, forged and cryogenic.

Gate Valve For Sale List By Size
The size of the pipe determines the size of the gate valve and the rate of flow required through the gate valve is considered first. ZECO international standard valve company manufactures the ball valve of smallest 1/2 inch, 2 inches, 3 inches, 4 inches, 6 inches, 8 inches, 12 inch and maximum 56 inches.

Choose ZECO as Your Professional Gate Valve Manufacturer
Gate valves are a major product in API 6D. Gate valve is divided into API 600 and ASME B16.34 according to API standard, which can be applied to low, medium and high-temperature pressure conditions. It basically covers the whole pipeline of petroleum, chemical and natural gas industry. Therefore, the proportion of gate valve in the industrial valve is the same as that of ball valve, which is a very important product.

The industrial gate valve is simple in structure and reliable in use. The wedge is closed and tightened slowly by the inclination and finally achieves the complete sealing condition. On the one hand, it depends on the professional design of technicians, on the other hand, it depends on the professional technology of production line personnel. Gate valve features a lot of, but on the pipeline is particularly important in the fully open position, is equal to the pipe size, meaning that the gate valve is installed directly under the state of full open section pipe, no resistance to medium, which is why the gate amount is so big, because there is no flow resistance and the dielectric saved the cost of the pipeline, with monthly is very large.

As one the leading gate valve suppliers, we offer many used gate valves for sale, if you are interested and want to know our pneumatic gate valve price and gate valve cost, please contact us.

Forged Steel Valve(2021年11月22日)

zecovalve — 2021-11-19T18:15:26+0900

https://www.zecovalve.com/products/forged-steel-valve/

As one of the leading china ball valve manufacturers, ZECO always adhere to exceed customer expectations, to provide customers with more international standard valve services and products as the ultimate goal.

As one of the professional steel valve manufacturers and carbon steel valve manufacturers, ZECO forged valve refers to the blank of valve, which is a forging piece with certain mechanical properties, shape and size produced by applying pressure on the metal blank by forging and pressing machinery, and then processed by ZECO manufacturing department on each side of the forging piece. The main materials used for valve forging are carbon steel and alloy steel of various costs, followed by titanium, copper and other alloys. The original state of forging is bar, ingot, metal powder, liquid metal, etc. Generally, the diameter of other forged valves on the high pressure pipeline of ZECO forged valves is less than 2 inch except some special conditions. Forged ball valves are also suitable for large diameter, because ball valves are easy to process.

Forged steel valve china adopts the forging process, because the mechanical properties of castings is lower than the same material of forgings, and forgings are formed by casting after forging processing of raw materials, the original casting internal loose grain structure, as a result of the forging force become more closely, make better continuity of metal fibre, plasticity and mechanical properties of the metal. ZECO is specialized in the production of forged valve factory, is the world's many oil companies, gas companies, chemical companies and energy companies and so on industry, the company's long-term strategic cooperation suppliers ZECO to constant innovation, continuous research and development, and constantly improve the attitude of the highest performance to provide users with the most reliable products, and ZECO to create world famous brand, and let ZECO products used in the various countries well-known oil companies to provide users with reliable quality products for a long time.

Forged Steel Check Valve(2021年11月21日)

zecovalve — 2021-11-19T18:14:56+0900

https://www.zecovalve.com/products/forged-steel-check-valve/

As one of the leading forged check valve manufacturers, ZECO specializes in producing forged steel check valves for nearly 30 years. The forged steel check valves include forged steel swing check valves and forged steel lift check valves. Forged steel check valve is a body automatic control valve, mainly rely on the flow of the media to automatically control the valve disc open or close, to prevent the reverse flow of the media in the pipeline. Forged steel swing check valve disc and swing arm connected together, when the medium from the valve inlet flow will push the disc to make the valve in the open state, and when the medium countercurrent, the disc due to gravity and the role of the medium thrust valve in the closed state, the greater the pressure of the medium countercurrent, the better the sealing effect.

Forged Steel Check Valve for Sale

Introduction of Forged Steel Check Valve
The valve disc opening and closing of the forged steel lifting check valve is controlled by the guide on the valve cover to ensure that the sealing surface of the valve seat does not deviate from the sealing surface of the valve seat and affect the sealing.When the medium in the pipeline from the outlet reverse countercurrent back, the pressure of the medium will push the valve disc to close slowly so that the valve disc and valve seat sealing surface closely cooperate with sealing, the greater the pressure of the pipeline, the better the sealing effect. Because the forged steel check valve serves as a counterflow barrier for the medium, ZECO's research and development team focuses on the two most important sealing surfaces of the check valve, and devotes itself to the production of each hard seal check valve to achieve the low-pressure non-leakage condition, which is more convenient for users to use in the working conditions.

Forged Ball Valve(2021年11月20日)

zecovalve — 2021-11-19T18:14:25+0900

https://www.zecovalve.com/products/forged-ball-valve.html

Description of Forged Ball Valve:
ZECO forged ball valve is divided into forged two-piece ball valves and forged three-piece ball valves, as well as small diameter forged ball valves and large diameter forged ball valves, which are widely used in various high-pressure industrial conditions. Usually pressure at 600 lb, 800 lb, 900 lb, 1500 lb, working temperature in various pipeline - 46 ℃ ~ 425 ℃.Of course, 150LB and 300LB of low pressure are also frequently used in the list of users. Its materials also include ASTM A105, ASTM A182 F304, ASTM A182 F316, ASTM B283 C61900, ASTM B148 C95800 forging and other forging materials.

Features of Forged Ball Valve:
1. ZECO forged ball valve has double piston effect seats which are pressure energized in both directions. So the seat rings are always pushed against the ball by the pressure from upstream/downstream or from the cavity. If the upstream seat fails, the downstream seat can still ensure a tight seal. Widely used in specific applications or for some pipe pressure testing. Since double piston effect valves do not have the self-relieving function, the automatic cavity-pressure relief valve shall be provided, unless otherwise agreed;
2. ZECO forged ball valve has one self-relieving seat. If the force created by the body cavity pressure is greater than the preloaded spring force plus the force created by the pressure from pipeline, the cavity pressure releases via the self-relieving seat, the double piston effect seat still functions a tight seal;
3. ZECO forged ball valve is available in additional configurations upon request, like Delta ring seat design, it’s easier to seal;
4. ZECO forged ball valve is available in additional configurations upon request, like Lipseal design, it’s easier to preserve.

Material of Forged Ball Valve:
NoPartMaterial
1BodyASTM B283 C61900
2BonnetASTM B283 C61900
3BallASTM B283 C61900
4SeatTEFLON
5StemASTM B283 C61900
6Stem PackingGraphite
7GasketGraphite
8BoltASTM A193 B8M
9NutASTM A194 8M
10Stop CollarASTM A1025
11LeverASTM A351 CF8

If you want to know forged ball valve price, please contact us.

Floating Ball Valve(2021年11月19日)

zecovalve — 2021-11-19T18:13:48+0900

https://www.zecovalve.com/products/floating-ball-valve.html

Description of Floating Ball Valve:
ZECO floating ball valve has two seats supporting the ball. Under medium pressure, the ball can be pressed tightly to the sealing surface for sealing at the outlet end. ZECO floating ball valve china is suitable for the condition of temperature from 196 ℃to 200 ℃, size from 1/2 "to 12", pressure from Class 150 to Class 1500. As one of the leading floating ball valve suppliers in China, we pay great attention to the quality of floating ball valves. If you are interested and want to know our floating ball valve price, please leave a message or directly contact us via. sales@zecovalve.

Features of Floating Ball Valve:
ZECO floating ball valve has the function of indicating switch. The ball, stem, and handle are the moving parts of the floating ball valve. ZECO design changes the top of the stem into the flat square structure, This provides a clear indication of the valve in open position during service when the handle is parallel to the line; When the handle is perpendicular to the line, indicate that the valve is closed;
ZECO floating ball valve is equipped with a locking device. ZECO adds two limit screws in the packing gland and coordinates the switch locating tab with a lock hole to ensure the damage of the valve caused by excessive opening, On the other hand, it is guaranteed that the valve can be locked in the fully open or fully closed state and cannot be operated by other personnel wrongly;
ZECO floating ball valve with the valve stem blow out proof structure, in order to prevent the maintenance of the valve, the pressure of the medium to stem the damage to the maintenance personnel, ZECO set a convex platform at the bottom of the stem structure, on the one hand, to ensure the stem will not be out of the body, on the other hand, ensure even packing damage, the valve stem convex sets and close contact between the body and will not lead to a medium-large leaking out;
ZECO floating ball valve is equipped with anti-static device, friction between the ball, PTFE and other non-metallic materials will generate electrostatic accumulation on the ball, without preventing the danger of electrostatic spark caused by the working condition, ZECO set up an anti-static device at the valve stem, which can export the static electricity through the valve stem.

Material of Floating Ball Valve:
NoPartMaterial
1BodyASTM A216 WCB
2BonnetASTM A216 WCB
3BallASTM A105
4SeatASTM A105 + PTFE
5StemASTM A182 F6a
6Anti-static DeviceSS304
7GasketGraphite + SS304
8BoltASTM A193 B7
9NutASTM A194 2H
10O-ringViton A
11LeverASTM A216 WCB

Installation of Pneumatic Ball Valves and Methods of Prolonging Its Service Life(2021年08月31日)

zecovalve — 2021-08-27T10:12:52+0900

https://www.zecovalve.com/installation-of-pneumatic-ball-valves-and-methods-of-prolonging-its-service-life.html

ZECO Vavle group, founded in 1991 located in Shanghai, Yancheng, Wenzhou with focus on manufacturing international standard valve, wedge grate valve, through conduit grate valve, floating ball valve and froged valve.ZECO has excellent product quality managing system, cretified by API 6D, CE/PED, IOS9001, IOS14001, IOS18001, FM, TS and approved by china valve supplier.

Vertical installation of pneumatic ball valve is possible. Generally, installation on pipeline can be divided into parallel installation and vertical installation, which is based on the actual situation of customers. But we recommend that it is generally best to install in parallel, so that it can be easily maintained and it is very beautiful. But in many special cases, pneumatic ball valves can also be installed vertically.

How to install the pneumatic ball valve?

How is the vertical ball valve installed? Can the pneumatic ball valve be installed vertically?

Vertical installation of pneumatic ball valves is possible. Generally, installation on pipeline can be divided into parallel installation and vertical installation, which is based on the actual situation of customers. But we recommend that it is generally best to install in parallel, so that it can be easily maintained and it is very beautiful. But in many special cases, pneumatic ball valves can also be installed vertically. Customers said that the pipeline space of parallel installation is not enough, then it will be installed vertically, which will not affect the service life.

Sealing position of pneumatic ball valve

Pneumatic ball valve seal generally consists of four seals: 1. Stem seal ring 2. Midway seal ring 3. Two seals on both sides. Stem seal ring refers to: seal ring where the valve stem operates, generally with tetrafluoro (PDFE) and flexible graphite; the middle seal ring refers to: the middle connection valve body seal, generally with tetrafluoro (PDFE) and graphite metal composite gasket; the two sides of the seal ring are: the ball core on both sides of the import and export seal ring. It is generally sealed with tetrafluoro (PDFE) and PPL (high temperature resistant sealing ring).

Pneumatic Ball Valve Actuator

The pneumatic ball valve consists of two main parts: actuator and valve. The actuator has two kinds: single-acting and double-acting.

So how to make your pneumatic ball valve easy to use and has long life? The service life of pneumatic ball valves is determined by the on-site use of customers.

To prolong the service life of pneumatic ball valves, the first thing is to keep the gas source stable. The stable gas source can directly affect the speed of the valve switch and the life of the valve sealing ring. It is better to install a couplet on each actuator. This couplet can not only provide stable air pressure, but also regularly refuel the cylinder. It can also discharge moisture from the air, which greatly improves the life of the cylinder. The life of the valve is determined by the medium used in the field.

Professional pneumatic actuator ball valve manufacturers and high quality ball valve will make its life longer. Among various pneumatic ball valve manufacturers, Zeco is the best choice for you. Zeco provides you with high quality pneumatic ball valve products.

Difference Between Gate Valve and Ball Valve(2021年08月31日)

zecovalve — 2021-08-27T10:11:48+0900

https://www.zecovalve.com/difference-between-gate-valve-and-ball-valve.html

Difference between ball valve and gate valve
The valve core of the ball valve is a ball. Because of its fixed ball structure, the valve is fixed under the condition of high pressure, especially when it is closed. The upper stem and the lower support shaft decompose part of the pressure from the medium, so the ball does not shift to the downstream, so the pressure on the downstream valve seat is relatively small, so the friction force that the valve overcomes when it acts is small, so the valve seat is ground. Small damage, the long service life of the valve, especially for frequently operated valves, this structure is more suitable.

The core of the gate valve is a wedge valve plate or parallel valve plate. There is no supporting shaft at its lower part. Therefore, when the valve is in the high-pressure application and in the closed state, the valve plate bears a great pressure from the medium. Because of the flat gate valve plate structure, all the medium pressure acts on the valve plate at the same time, the valve plate will be dead pressed to the downstream valve seat (at the same time, the excessive pressure acts on the vertical surface of the valve plate, making the valve plate whether wedge-shaped or parallel double ram. There will be some deformation), so the valve needs to overcome great friction when it is opened, so the life of the valve printed by the wear of the valve seat is short.

Valve seat
There is a spring in the valve seat of the ball valve, and the sealing design of the valve seat makes it difficult for the dregs in the medium to enter the valve seat. The valve seat contacts with the valve ball for a long time under the action of spring, so when the valve acts, the valve seat has a certain scraper function, which can scrape off the residue attached to the valve core after long-term operation, so the sealing performance of the valve can be guaranteed for a long time. Especially in the application of high temperature and high pressure, because the materials of valve seat, valve body and valve ball are selected with the same thermal expansion coefficient and the valve seat with spring structure, when the valve is closed, the huge temperature difference and temperature drop will not affect the action of the valve, and the valve will not be locked. The valve seat is very narrow. In high-temperature application, when the valve is closed because the medium is not circulating, the temperature will drop, so the valve seat will be tightened, which will produce a great pressing force on the valve plate. When the valve is opened again, a large torque is needed to overcome this pressing force, which will cause great damage to the valve seat and affect the service life of the valve seat. Thus, the service life of the valve is affected. In addition, due to the self-weight of the gate itself when the valve is closed, it will bring great impact force and noise to the valve.

Itinerary
The stroke of the ball valve is angle stroke, so the installation space is small and the height is low.
The stroke of the gate valve is a straight stroke, so the installation space is large and the height is high.

Actuator
Due to the design of the fixed ball, the torque value of its opening and closing is small, so the corresponding actuator is small. Because the valve plate has a large pressing force on the valve seat, it needs a large torque to overcome this large friction, and the actuator is equipped with a large amount of torque.

Medium flow direction
Double flow direction, no installation flow direction problem on site.
Generally, it is a single flow direction.

Service life
The ball valve has a longer service life, while the gate valve's service life is relatively short.

Maintenance
The ball valve generally does not need maintenance, especially the ball and valve seat. Due to the small wear, it does not need to be replaced within 5 years.

The gate valve needs regular maintenance due to the large wear of the valve seat

3 Inch Butterfly Valve(2021年08月31日)

zecovalve — 2021-08-27T10:11:12+0900

https://www.zecovalve.com/products/3-inch-butterfly-valve.html

Description of 3 Inch Butterfly Valve:
ZECO 3 inch flanged butterfly valve is a small diameter butterfly valve, usually manually operated, and the connection is usually lug type or wafer type, because the advantage of small diameter butterfly valve is that it is simple in accordance with the way, compared with other valve flange connection operation is fast and simple. ZECO as a professional on the wafer and lug type butterfly valve manufacturer, is strict to the material and appearance of the casting, casting usually arrive ZECO factory, will be isolated in the corresponding area waiting for QC inspector inspection, inspector will, in turn, the chemical composition, physical properties of the casting and design is individually and will follow the ERP system into the data of the product review file for later use. ZECO also pays great attention to every detail in the production process, and each process will be tested and recorded by corresponding inspectors in the ERP system.

Features of 3 Inch Butterfly Valve:
1. ZECO 3 inch butterfly valve can use metal seal structure and resilient seal structure, connection mode can also choose lug type, wafer type and flange connection, the choice of diversity, users can choose according to the actual working conditions to meet the requirements of working conditions;

2. ZECO 3 inch butterfly valve has low torque. Although it is small in size, ZECO engineers make every effort to design the product so that users can feel ZECO's improvement in design, rather than rush through it;

3. The stem of ZECO 3 inch butterfly valve is designed with anti blow-out structure, which can ensure the maintenance personnel to avoid personal safety damage caused by the pressure of the middle chamber pushing out the stem when replacing the packing;

4. The seat and sealing ring of ZECO butterfly valve can be replaced, which ensures the quick and convenient maintenance of maintenance personnel on site.

Material of 3 Inch Butterfly Valve:
NoPartMaterial
1BodyASTM A216 WCB + 13Cr
2Seal RingGraphite + SS316
3Retainer FlangeASTM A182 F316
4PinASTM A276 316
5DiscASTM A351 CF8M
6StemASTM A276 316
7Stem PackingGraphite
8Stem BeatingSS316 + PTFE
9BoltASTM A193 B7
10NutASTM A194 2H
11YokeASTM A216 WCB

If you want to know 3 inch butterfly valve price, 4 inch butterfly valve price, butterfly valve price, please contact us.

3 Inch Ball Valve(2021年08月31日)

zecovalve — 2021-08-27T10:10:43+0900

https://www.zecovalve.com/products/3-inch-ball-valve.html

Description of 3 Inch Ball Valve:
ZECO 3 inch stainless steel ball valve is usually a floating ball valve, the material can also be divided into casting and forging two kinds. ZECO's continuous improvement in products makes all staff in the factory attach equal importance to small-caliber products in batch. No matter from the aspects of purchase, processing, assembly, testing, spraying, or from the traceability of bar codes, ZECO will treat them as equals and try its best to make products more delicate.

Features of 3 Inch Ball Valve:
1. Stem surface roughness is strictly restricted between Ra0.4 and Ra0.8, which ensures entry of graphite packing powder into tiny stem scratches to function as a lubricator, minimizing leakages around stem. Max roughness of stuffing box is RA3.2, which is a proper value to hold packing ring in place and result in better sealing performance;

2. The packing is combination of parallel and vertical layer which is made of die-formed graphite ring processed by flexible graphite, characterizing heat resistance, less stress relaxation and low creep. The special structure means low friction on rotary stem, providing stabilized seal capability for the valve for a long time under frequent functioning;

3. Lipseal is the spring-energized seal, including Elgiloy or Inconel spring and PTFE jacket. lt's effective in a wide breadth of applications, such as highly corrosive chemical media, high sour gas, low temperature or cryogenic service;

4. ZECO strictly control the quality of bulk products, 100% inspection.

Material of 3 Inch Ball Valve:
NoPartMaterial
1BodyASTM A182 F304
2BonnetASTM A182 F304
3BallASTM A182 F316
4SeatASTM A182 F316
5StemASTM A276 316
6Anti-static DeviceSS316
7GasketGraphite + SS316
8BoltASTM A193 B8
9NutASTM A194 8
10O-ringViton A
11LeverASTM A216 WCB

2pc Ball Valve(2021年08月30日)

zecovalve — 2021-08-27T10:10:12+0900

https://www.zecovalve.com/products/2pc-ball-valve.html

Description of 2pc Ball Valve:
ZECO Ball valve is the same to the ordinary that trim spring with the stem to reach the purpose of open/ close, it is mainly adopted to cut off medium on pipe. It features for simple structure, good sealing capacity, flexibility, small blockage coefficient, easy operation etc. ZECO is the global supplier of 2PC ball valves, which can be divided into 2PC floating ball valves and 2PC trunnion mounted ball valves.

Features of 2pc Ball Valve:
1. As the moving parts of valve, ball, valve stem and handle are an assembly unit. The head of valve stem is shaped a diploid, thus to easily distinguish whether valve is in the “ON” position from handle position. When handle or stem diploid is in parallel with the pipe axis, valves is in “ON” position, when handle or stem diploid is vertical to the pipe axis, valve is in “OFF” position;

2. When the medium go through the valve, the pressure in middle cavity would pull out the stem. In order to prevent the occasion from happening, a convexity is designed. At the same time, a lubricator device has been added, so even if the fire damage would happen to damage the o-ring, the lubricator device would inject sealing oil to prevent medium from leaking;

3. When operating the valve, the friction between the ball and the nonmetal seat, like PITE or etc. will produce electrostatic charge that can be accumulated on the ball, To prevent static spark, an anti-static device is placed on the valves to derive the electric charge accumulated in the ball from the static channel between the ball and the stem, or between the stem and valve body;

4. In order to prevent the mal-operation of the valve, the open/close position can be equipped with lock device, especially when they are used outdoor or process forbidden the malfunction.

Material of 2pc Ball Valve:
NoPartMaterial
1BodyASTM A182 F316
2BonnetASTM A182 F316
3Bonnet BoltASTM A193 B8M
4Bonnet NutASTM A194 8M
5Bonnet GasketGraphite +SS316
6Seat RingVITON
7BallASTM A182 F316
8StemASTM A276 316
9Stem PackingGraphite
10GlandASTM A351 CF8M
11Stop CollarANSI 1025

12 Inch Butterfly Valve(2021年08月29日)

zecovalve — 2021-08-27T10:09:42+0900

https://www.zecovalve.com/products/12-inch-butterfly-valve.html

Description of 12 Inch Butterfly Valve:
Most of ZECO 12 butterfly valve operated by hand-wheel, wrench and handles, pay attention to the operation speed, neither too fast nor too slow, and exert force at proper position. End position is vital important to valve performance. In Close position, ball shall be at right position to seat. The closure parts of the valve seat so close to the campaign and leave the valve seat, the valve sealing performance depends in part on the relative pieces of stem-driven closure of the valve seat to remain sealed and the resulting mechanical force. If the role of a particular incident in the direction of the closure of the closure of the pressure to close the case up from the seat, and that this power is essential. Most of the internal closure of the sliding piece in the valve seat does not rely on force stem seals, but this type of valve position to close the right thing or not is very important. In some cases, when the closure parts close to the final closed position, the driving force needed to close the case may be greatly increased, to reach the required position has been shut down parts of an auxiliary compression. Close cases are not accessible or not stopped in the customs location will have a seal leak and damage. Butterfly Valves requires right position to guarantee sealing. When the indicator shows Close position, movement shall be stopped.

Features of 12 Inch Butterfly Valve:
1. ZECO 12 inch butterfly valve has no dead zone design;
2. ZECO 12 inch butterfly valve has live loaded packing system design;
3. ZECO 12 inch butterfly valve has fire protection structure design;
4. ZECO 12 inch butterfly valve has double safety sealing design.

Material of 12 Inch Butterfly Valve:
NoPartMaterial
1BodyASTM A216 WCB + 13Cr
2Seal RingGraphite + SS304
3Retainer FlangeASTM A105
4PinASTM A276 410
5DiscASTM A216 WCB
6StemASTM A276 410
7Stem PackingGraphite
8Stem BeatingSS304 + PTFE
9BoltASTM A193 B7
10NutASTM A194 2H
11YokeASTM A216 WCB

If you want to know 12 inch butterfly valve price, please contact us.

Chemical(2021年08月28日)

zecovalve — 2021-08-27T10:09:00+0900

https://www.zecovalve.com/chemical-valve/

INDIA JSW DOLVI 1 Million Tons Coke Oven Project
ZECO CHEMICAL VALVE provided lug butterfly valves, cast steel gate valves and motorized ball valves and some other industrial valves.

SINOPEC Nanjing Engineering & Construction Inc.
ZECO VALVE provided forged steel ball valves, gear operated gate valves and electric ball valves and some other industrial valves for SINOPEC to complete the successful completion of CNOOC Huizhou project.

TISCO Expansion Coke Oven Project (VIETNAM)
ZECO VALVE provided triple offset butterfly valves, gear operated butterfly valves and gear operated gate valves and some other industrial valves for TISCO Expansion Coke Oven Project (VIETNAM).

Characteristic of Trunnion Mounted Ball Valve Construction Machinery(2021年08月27日)

zecovalve — 2021-08-27T10:08:24+0900

https://www.zecovalve.com/characteristic-of-trunnion-mounted-ball-valve-construction-machinery.html

Although there are many types of trunnion mounted ball valves produced by trunnion ball valve supplier, they all have the following characteristics:

1. Its operation is labor-saving: the ball is supported by upper and lower bearings, which reduces friction. It eliminates the excessive torque caused by the enormous sealing load formed by the sphere and seal seat driven by the inlet pressure.

2. Reliable sealing performance: PTFE unisexual material seals are embedded in stainless steel seats with springs at the end of the metal seats to ensure sufficient preload of the seals. When the sealing surface of trunnion type ball valve characteristics is worn out during use, the valve will continue to ensure good sealing performance under the action of spring.

3. Fire-proof structure: In order to prevent the PTFE sealing ring from burning down due to sudden heat or fire, and to increase the fire potential, a fire-proof sealing ring is set between the sphere and the valve seat. When the sealing ring is burned down, under the action of spring force, the seat sealing ring is quickly pushed onto the sphere to form a metal and metal seal. It has a certain degree of sealing effect. The refractory test meets the requirements of APl6FA and APl607 standards.

4. Automatic pressure relief function: When the medium pressure in the stagnant chamber of the trunnion mounted ball valve construction increases abnormally beyond the pre-force of the spring, the seat retreats away from the ball to achieve the effect of automatic pressure relief, and the seat is automatically restored after pressure relief.

5. Drainage pipeline: Both upper and lower parts of the valve body are equipped with discharge L, which can check whether the valve seat leaks or not. In work, when the valve is fully open or closed, the pressure in the middle chamber can be discharged and the filler can be replaced directly. The residue in the middle chamber can be discharged to reduce the medium pollution to the trunnion mounted ball valves.

Zeco Value is one of the most professional trunnion mounted ball valve suppliers.

Working Principle Of Three Piece Ball Valve(2021年)

zecovalve — 2021-06-07T10:04:45+0900

https://www.zecovalve.com/working-principle-of-three-piece-ball-valve.html

The working principle of the three-piece ball valve is as follows:

ZECO Valve Group is a professional Valve company. We provide Electric Ball Valve, Pneumatic Ball Valve, group valve and so on. Want to know about valve principle? Please contact us.

What's the Difference between Trunnion and Floating Ball Valve?(2021年)

zecovalve — 2021-06-07T10:04:15+0900

https://www.zecovalve.com/what-is-the-difference-between-floating-ball-valve-and-trunnion-mounted-ball-valve.html

ZECO Valve Group is one of professional china check valve manufacturers. We provide Electric Ball Valve, Pneumatic Ball Valve, international standard valve and so on. Want to know about floating ball valve trunnion, trunnion mounted ball valve vs floating ball valve and floating type vs trunnion ball valve? Want to know about trunnion mounted vs floating ball valve, trunnion ball valve vs floating ball valve and trunnion valve vs floating valve? Want to know about floating ball valve vs trunnion and ball and trunnion? Please contact us.

What is the Difference Between Ball Valve and Butterfly Valve in Structure and Performance?(2021年)

zecovalve — 2021-06-07T10:03:42+0900

https://www.zecovalve.com/what-is-the-difference-between-ball-valve-and-butt.html


The tightness and caliber are different

The characteristics of the butterfly valve are fast opening and closing speed, simple structure and low cost, but the tightness and pressure capacity are not good. The ball valve can quickly open and close, and can achieve complete sealing under high pressure and temperature. So in comparison, the sealing performance of the ball valve is better than that of the butterfly valve. However, due to the limitation of volume and opening and closing resistance, the ball valve is difficult to achieve a large diameter, and the structural principle of the butterfly valve is particularly suitable for making large diameter valves.

The use temperature and withstand voltage are different

From the point of view of service temperature, due to the sealing material and structure, ball valve is not suitable for steam medium, while butterfly valve can be used for conventional saturated steam medium for heating (below 350 ℃).
The structure of butterfly valve is relatively simple, and butterfly valve is generally used for low pressure, while the structure of ball valve is relatively complex, more resistant to high pressure.

Operating torque

In terms of operating torque, the butterfly valve is a three eccentric metal seal butterfly valve, so its opening and closing torque is very small. With the increase of the diameter of the ball valve, the contact area of the sealing surface also increases squarely, so the opening and closing torque of the large diameter ball valve will be very large.

ZECO Valve Group is a professional china valve supplier and Valve factory. We provide Electric Ball Valve, Pneumatic Ball Valve and so on. Want to know about gate valve and butterfly valve difference? Want to know about difference between butterfly valve and ball valve? Want to know about difference between gate valve ball valve and globe valve? Please contact us.

What are the Structure Types and Advantages of Floating Ball Valve?(2021年)

zecovalve — 2021-06-07T10:03:13+0900

https://www.zecovalve.com/what-are-the-structure-types-and-advantages-of-floating-ball-valve.html

At present, there are many ball valve structures and specifications in our market, and new products and structures are emerging. The ball valve for sale can be divided into many types according to its main characteristics and applications.

Zeco is one of the most professional and reliable floating ball valve manufacturer in China. If you have any questions or want to buy our products, please leave a message or write an email via sales@zecovalve.com.

ZECO Valve Group is one of professional international valve suppliers. We provide Electric Ball Valve, Pneumatic Ball Valve and so on. Want to know more? Please contact us.

The Prospect of Valve in Oil & Gas Industry(2021年)

zecovalve — 2021-06-07T10:02:38+0900

https://www.zecovalve.com/the-prospect-of-valve-in-oil--gas-industry.html

Today, the global oil and gas industry is growing slightly, and international energy is still dominated by fossil energy. The overall international oil price is rising, but the oil price is volatile and the oil supply is excessive. Global gas production and consumption are growing in tandem. Guided by policies, many developing countries, including China, have accelerated the construction of large-scale projects in the fields of oil refining, natural gas, coal, and chemical industry, and upgraded their overall production capacity. At the same time, the backward production capacity will inevitably be eliminated.
As the oil and gas industry speeds up the construction of large-scale projects, valves in the oil and gas industry will further develop in the direction of high-parameter large scale. With the strict control of equipment price by users, the localization process of key valves in the oil and gas industry will be further accelerated, and the valves with high sulfur content, high-pressure hydrogen flow, wear resistance and corrosion resistance, high-pressure oxygen and other harsh conditions will be fully localized, and users will put forward higher requirements for the long-term reliable operation of valves. With the continuous improvement of the environmental protection requirements of the international community, the microleakage of the valve will increase the higher requirements, the valve structure design without external leakage, the valve stem packing seal reliability will be more attention.

ZECO Valve Group is a professional china valve factory and Valve supplier. We provide Electric Ball Valve, Pneumatic Ball Valve and so on. Want to know about ball valve oil and gas industry? Please contact us.