Hello guest! Welcome to wsdvalve
  • Double Air Valve
  • previous
  • next

    Double 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

    TAG: , ,


    Tel: +86-13849184495
    Fax: +86-371-55883235
    E-mail: weisidun@wsdvalve.com
    Address: ZhengZhou,HeNan,China.

    What is doubleair air valve?

    Exhaust air valves are used in the independent heating system, central heating system, heating boiler, central air conditioning, floor heating, and solar heating system. Because usually certain air is dissolved in water, and air solubility with the rising temperature decreases, the water, in the process of cycle gas, gradually separates from the water, and gradually comes together to form a big bubble column, even because there is water, so often has 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 suction air automatically to prevent the pipeline from breaking. This valve has a big gas displacement for double air vents, and it owns a maintenance valve, close it when repaired then it can be on-line.

    Advantages of doubleair air valve?

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

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

    2. Floating ball is stainless steel, has a long service life, and is safe and reliable.

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

    3. Light torque

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

    4. Small flow resistances

    Smooth cage outside of the float. Keep float moving in the specified guide rail.

    5. Not easy to produce water hammer

    Bottom rubber buffer for collision prevention, and drain easy with proper holes around the cage during vacuum.

    6. High sealing performance

    Outside screen will be an option for safety and prevent insects and birds in.

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

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

    8. Simple and convenient installation, interchangeable parts

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

    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.

    WESDOM  advantages

    1. WESDOM patent products, patent certification
    The product side flanges comply with national, German, Russian, American, British and Japanese standards and other domestic and international standards for multiple pressures, easy connection and wide adaptability, which can reduce the type of purchase and stock.

    2. The product has an independent identity to ensure traceability
    Each wesdom product has its own unique identification number, to ensure product traceability.

    3. Provide material inspection report
    All wesdom products can provide the material inspection report of the main parts.

    4. One-stop service
    One-stop service, we not only supply high quality products, also supply solutions and after-sales service.

    5. WESDOM has a lot of project experience
    We have a lot of project experience in countries such as Pakistan and the Philippines, WESDOM has always been noticed all over the world, and trust comes from quality.

    Quality control process

    quality control process quality control process

    quality control process


    Double Air Valve








    Applicable Standards

    Face to face dimensional

    To BS4504/EN1092-2


    RF flange

    Maximum working pressure


    Maximum working temperature



    cast iron/ductile iron


    cast iron/ductile iron









    Related Products

    • Double Ball Exhaust Valve

      Double Ball Exhaust Valve

    • Single Flange Bleed Valve

      Single Flange Bleed Valve

    • Compound Air Exhaust Valve

      Compound Air Exhaust Valve

    • Triple Functions Air Valve

      Triple Functions Air Valve


    WESDOM Group promise to reply within 24 hours.

      Copyright © 2023 Wesdom Group. All rights Reserved.