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Air Valve

DN40 50 DI CI Automatic exhaust Screwed Single AIR release vents Valve

Place of Origin:China
Brand Name:Jinhongda
Model Number:1/2"-4"
Certification:ISO CE
Minimum Order Quantity:1
Packaging Details:Standard export packing, plastic bag, woven bag, wooden case, or as required.
Delivery Time:To be negotiated
Payment Terms:transfer and letter of credit
Supply Ability:20000 Unit/Units per Month

The gas valve is a component in the compressor that controls the gas flow in and out of the cylinder. It is mainly composed of valve seat, valve plate, spring and lift limiter. The lifting height or closure between the valve disc and the valve seat determines the size and tightness of the gas channel. The spring is mainly used to push the valve disc to close, and also to reduce the impact of the valve disc with the lift limiter when it is opened. The lift limiter can limit the lift of the valve plate and can bear the seat spring; The opening and closing of the valve plate of the gas valve is controlled by the pressure difference between the inside and outside of the cylinder and the spring force, without other driving mechanisms, so it is called automatic valve.

Main Feature:

1. Q10 or Q12 original cast iron as ductile iron 

2. EPDM, vulcanization pressure technology

3. Spray coating approved by WRAS




Product NameMaterial
Valve BodyDuctile iron, plastic spraying
Wedge DiscDuctile iron, overall EPDM coating
Stem2Gr13, 45#chrome-plated steel, SS304, SS316, SS410 Stem
Air portNBR
Wedge NutSteel or Brass


Competitive Advantage

Product characteristic:

When there is gas overflow in the system, the gas will climb up along the pipeline and finally gather at the highest point of the system, while the exhaust valve is generally installed at the highest point of the system.


1. High sealing performance

2. Light torque

3. Small flow resistances

4. Not easy to produce water hammer

5. Simple andconvenient installation, interchangeable parts

6.100% inspection before delivery

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