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Pneumatic Regulating Butterfly Valve

Keywords: metering pump accessories


Pneumatic butterfly valve

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    Principle of pneumatic regulating butterfly valve:

     Pneumatic butterfly valve actuators are divided into single-acting and double-acting principles, which are common pneumatic switching butterfly valves and pneumatic regulating butterfly valves. The single-acting type has an air-closing spring return type and an air-opening spring automatic return type. The single-acting type is suitable for places that require normally open or normally closed. Double-acting is an air-opening and air-closing type. Both opening and closing require air source pressure, and the regulating pneumatic butterfly valve should adopt a double-acting mode.

    Picture of pneumatic regulating butterfly valve
    Pneumatic flange regulating butterfly valve Pneumatic wafer regulating butterfly valve

    Product parameters

    Technical parameters of pneumatically adjusted butterfly valve:


    Nominal diameter


    Pressure Level


    Connection method

    Flange, clip-on connection

    Sealed form

    Soft seal or metal hard seal

    Drive mode

    Air source driven, compressed air 4~7bar (can be equipped with handwheel)

    Action range


    Valve body material

    Carbon steel, stainless steel 304, stainless steel 316


    Water, steam, oil, acid corrosiveness, etc. (high temperature occasions)

    temperature range

    Soft seal: -29℃~180℃ Hard seal: -40℃~550℃

    control method

    Equipped with valve positioner, intelligent adjustment type (4~20mA analog signal)

    Standard specifications for pneumatically regulated butterfly valves:

    Design standards: GB/T2238-1989

    Structure length: GB/T12221-1989   

    Pressure test: GB/T13927-2000; JB/T9092-1999  

    Flange connection dimensions: GB/T9113.1-2000; GB/T9115.1-2000;

    Adjustable range R: 50:1

    Number of uses: 1 million times


    Hysteresis: with positioner: less than 2% of the full stroke


    Basic error: with positioner: less than ±2% of full stroke


    Leakage amount l/h: complies with ANSI B16.104 Level IV standard


    Pneumatic regulating butterfly valve structure diagram
     Pneumatic regulating butterfly valve (flange type) Pneumatic regulating butterfly valve (wafer type)

    Pneumatically adjusted butterfly valve actuator parameters:

    executive agency

    GT, AT, AW series single and double acting pneumatic actuators

    Air supply pressure


    Air supply interface


    ambient temperature


    Action form

    Double-acting actuator: air-closing type (B)--the valve position is maintained when the air is lost (FL); air-opening type (K)--the valve position is maintained when the air is lost (FL)

    Optional accessories

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