gate valve wesdom



Doubleair Air Valve Saudi

Doubleair Air Valve

Size: DN50-DN200

Pressure Rating: PN10/PN16

Material:Cast iron/Ductile iron

Face to face dimensionacc: To BS4504/EN1092-2

Flange: RF flange

Application medium:Water

Application Temperature: -10---80℃

Applied projects:Water conservancy construction


Product details

Exhaust valves are used in the independent heating system, central heating system, heating boiler, central air conditioning, floor heating and solar heating system. Because usually have certain air dissolved in water, and air solubility with the rising of temperature decreases, the water in the process of cycle gas gradually separated from the water, and gradually come together to form a big bubble column, even because there is water, so often have gases.

Air valves are applied on the water pipelines and the equipment to exclude the gas in pipelines, it enhances the efficiency of water transport and protects pipelines from transformation and break. When the pipeline is under negative pressure, this valve will suotion air automatically to prevent the pipeline breaking. This valve has a big gas displacement for double air vents, it owns maintenance valve, close it when repaired then it can be on-line.


1.Advanced design with simple mechanism, strong float to prevent cracking during sudden water hammer and quick closure.

2.Self-moving mechanism to resist blow shut under higher air velocity even up to sonic velocity of air.

3.No arms or levers to prevent vibrating, bending, direct closure of the float.

4.Smooth cage outside of the float, keep float moving in specified guide rail.

5.Bottom rubber buffer for collision prevention, and drain easy with proper holes around the cage during vacuum.6.Outside screen will be an option for safety and prevent insects and birds in.

7.Fully fusion epoxy coated inside and outside of valve for long service life.

8.Good for distribution pipeline system, if for transmission pipeline with high impact water hammer, the anti shock device should be required.


1. Can eliminate the gas in the pipe, reduce drag and save energy.

2. When the pipe is under pressure, the product can automatically inhale air to prevent the pipe from bursting

3. Floating ball is stainless steel, long service life, safe and reliable.

Double air valves have three functions :

1.Evacuation of air at a high flow rate when pipes are being filled ;

2.Intake of air at a high flow rate when pipelines are being drained (protection of the network against a pressure drop in the pipelines in the case of a main being broken) ;

3.Degassing at a low flow rate when in operation.



Size DN50-DN200
Pressure PN10/PN16
Applicable Standards
Face to face dimensionacc To BS4504/EN1092-2
Flange RF flange
Maximum working pressure 16bar(1.6mpa)
Maximum working temperature  -10—80℃
Body cast iron/ductile iron
Bonnet cast iron/ductile iron
Bolt SS304
Nut SS304
Ball SS304


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