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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.