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Pneumatic Rubber Lined Butterfly Valve

Keywords: metering pump accessories


Pneumatic butterfly valve

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    Application scope of pneumatic rubber lined butterfly valve:


     Rubber-lined pneumatic butterfly valves are suitable for the transportation of liquids and gases (including steam) and other media in various types of industrial pipelines, as well as the use conditions of weakly corrosive fluid media, for two-position switch control or medium flow rate adjustment. The working temperature generally does not exceed 180℃, and the nominal pressure is ≤1.6MPa. It is widely used in food, medicine, chemical industry, petroleum, electric power, textile, papermaking and other places.


    Performance characteristics of pneumatic rubber-lined butterfly valve:


     1. The use of rubber-lined pin-free ensures complete isolation of the medium and metal, improving the reliability of the product.

    2. The sealing surface has good wear resistance (the wear resistance of rubber is seven times that of copper).

    3. It can be installed at any position and is easy to maintain.

    4. The seals can be replaced, and the sealing performance is reliable and achieves two-way sealing and zero leakage.

    5. The rubber material has no toxicity, is antibacterial and anti-mildew, and the product price is one-third of that of stainless steel valves.

    Technical parameters of pneumatic rubber-lined butterfly valve:


    Nominal diameter


    Pressure Level


    Connection method

    Clamp type, flange connection

    Drive mode

    Pneumatic control (air source drive, compressed air)

    proper temperature

    Various rubbers: -20℃~150℃

    Leakage amount

    Comply with standards (up to zero leakage)

    Sealed structure

    Half rubber-lined seal, fully rubber-lined seal


    Water, gas, oil and weakly corrosive fluids (normal temperature and pressure situations)

    control method

    Switch two-position mode (gas on and off), regulating type (4~20mA analog signal control)


    Standard specifications for pneumatic rubber-lined butterfly valves:


    Design and manufacturing standards: GB/T 12238-2008

    Structural length standard: GB/T 12221-2005

    Connection flange standard: GB/T 9113

    Pressure temperature grade: GB/T 12224-2005

    Test and inspection standards: GB/T 13927-2008

    Pneumatic rubber lined butterfly valve structure diagram
      Pneumatic rubber-lined butterfly valve (wafer type) Pneumatic rubber-lined butterfly valve (flange type)

    Pneumatic rubber lined butterfly valve parts materials:

    Valve body: cast iron, ductile iron, carbon steel, stainless steel

    Butterfly plate: cast iron, ductile iron, carbon steel, stainless steel fully covered with rubber or fluoroplastic

    Valve stem: carbon steel plated with nickel phosphorus, stainless steel

    Valve seat seal: natural rubber NR, neoprene CR, nitrile rubber NBR, EPDM, fluorine rubber FKM

    Seal ring operating temperature: nitrile rubber X≤80 degrees; wear-resistant rubber X6≤150 degrees; chloroprene rubber ≤120 degrees; fluorine rubber X7≤150 degrees;


    Pneumatic rubber-lined butterfly valve performance specifications:

    Nominal diameter



    Nominal pressure





    test pressure

    Strength test




    Sealing test




    Air seal test




    Action form

    Double acting (gas on and off), single acting (normally closed, normally open)

    Optional accessories

    Positioner, solenoid valve, air filter pressure reducer, position retaining valve, travel switch, valve position transmitter, handwheel mechanism, etc.