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https://www.wsv-valve.com/products/rotary-motion-control-valves/

As a professional industrial valve company, our commonly used industrial valve materials include Titanium, Zirconium, Nickel, Hastelloy, Monel, Inconel, Nickel Aluminum Bronze, Alloy 20, 904L, Duplex /Super duplex stainless steel, Tantalum, etc high alloy, and stainless steel.

Rotary motion is a kind of action of control valves, its actuator receives the control signal and turns the signal into displacement thrust or angular torque to control the opening and closing of the valve.

Rotary motion control valves have a valve disc driven by the stem to make an angular rotational action perpendicular to the stem, generally in a 90-degree range of reciprocal rotational motion.

Rotary motion control valves contain ball valves, butterfly valves, plug valves, etc.

Rotary motion control valves are widely used in petroleum, chemical, electric power metallurgy and other industries, with detection instruments, can play a role in preventing accidents, when the instrument detects a dangerous signal, the angle-stroke switching valve can immediately act to cut off the media supply to prevent malignant accidents from occurring.

Features Of Rotary Motion Control Valves

1. From the flow path, the rotary control valve is straight through the flow path, more simple.

• Small flow resistance, large Kv value(1.5~3 times larger).
• Medium straight through, "self-cleaning" and good anti-blocking.
• Small size and lightweight (50%~80% lighter).
• Small size, good appearance.

2. From the valve disc rotation structure, the defects of the rotary globe control valve are reduced.

• Valve disc rotation media leakage outward is difficult, rotation friction is small, can be used to seal better performance of the packing to increase the seal lifetime arrival at 2 ~ 3 times.
• Due to the force arm is small, the torque is small, the allowable pressure difference is large.
• The rotary globe valve disc is a spherical surface, it with good sealing and small leakage.
• Good erosion resistance. The valve disc is in the valve cavity inside, avoiding direct media erosion.
• Good elimination of the upper and lower resonance.

Types Of Rotary Motion Control Valves

Control Ball Valves
Weidouli Control Ball Valves contain an On-off control ball valve(O type ball design) and a Control Segment ball valve(V type ball design).

The on-off control ball valve is evolved from plug valve, the opening and closing parts is a ball, using the ball goes around the axis of the stem 90 degrees to achieve the air of opening and closing. The on-off control ball valve is mainly used for cutting, rolling, distributing, and changing the flow direction of the medium in the pipeline.

Control Plug Valves
Control Plug Valves can rotate 90° to connect or cut the medium. Body cavity with grooves and convex edges structure design can fix sleeve effectively, which can meet special application need. The design can protect valves avoid from the sleeve and plug rotation at the same time which may cause the valve to break when close. Sleeve material uses Dupont PTFE, it has good strength, small friction factor, small torque, reliable seals, long service life, etc. advantage.

Control Butterfly Valves
Control butterfly valves of Weidouli are designed and manufactured in strict accordance with the latest version of API 609 specification, meanwhile, our company can also meet BS5155, ANSI B 16.34, ASME SEC VIII, and other major specifications, which ensures that our control butterfly valve can fit in all industrial fields.