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Pneumatic high pressure control valve


  • Port size:DN20~80, NPS 3/4〞~ 3〞
  • Pressure:PN160 ~420,900LB ~ 2500LB
  • Medium:Steam,gas
  • Temperature :-40~570℃
  • Body material:WCB WC6 WC9/A105 F11 F22
  • Description:
  • Pneumatic high pressure control valve Feature

    Pneumatic high pressure control valve is a special control valve for high pressure  high temperature system.Pneumatic high pressure control valve is widely used for automatic adjustment and remote control of production process in chemical fertilizer, petrochemical, power station, light industry, etc.

    Pneumatic high pressure control valve adopts compact valve body, with a shade flow passage that features low pressure loss, allows a large flow capasity and rangeability. The valve plug of Pneumatic high pressure control valve is highly vibration-resistant as the control valve is held by a top guide section which has a large slideing area. The flow shut-off performance complies with the ANSI Standard. The actuator of pneumatic control valve  integrated with simplest mechanisms utilizes a compact yet powerful diaphragm actuator loaded with multiple springs.

    The Pneumatic high pressure control valve is widely applicable for reliable control of high temperature, high pressure process lines.

  • Pneumatic high pressure control valve specification

     Pneumatic high pressure control valve Body type: casting globe type
    Spool type: single seat,cage guiede
    Nominal size: DN20~80 NPS 3/4〞~ 3〞
    Nominal pressure: PN160 ~ 420、 CLASS 900LB ~ 2500LB
    Connection: flange: FF、RF、MF、RTJ
    Welding: SW、BW
    Flange dimension: According to to IEC 60534
    Pneumatic high pressure control valve Bonnet type: Ⅰ:standard type(-20℃~230℃)
    Ⅱ:Radiator type: (-45℃~ high than 230℃ occasion)
    Ⅲ:Low temperature extended type(-196℃~ -45℃)
    Ⅳ:Bellow seal type
    Ⅴ:Warm insulation Jacket type
    Packing: V type PFTE packing, flex. graphite packing, etc.
    Gasket: Metal graphite packing
    pneumatic control valve Actuator: Pneumatic:multi-spring diaphragm actuator, piston type actuator.
  • Pneumatic high pressure control valve material

    Component name pneumatic control valve Material
    Body/Bonnet WCB/WCC/WC6/CF8/CF8M/CF3M/A105/F11/F22
    Valve spool/Seat 304/316/316L(overlaying stellite alloy)
    Packing Normal:-196~150℃ is PTFE,RTFE,>230℃ is flexible graphite
    Bellow 304,316,316L
    Gasket Normal:Stainless steel with flexible graphite,Special:Metal tooth type gasket
    Stem 2Cr13/17-4PH/304/316/316L
    Diaphragm Cover Normal:Q235,Special:304
    Diaphragm NBR with reinforced polyester fabric
    Spring Normal:60Si2Mn,Special:50CrVa
  • Pneumatic high pressure control valve performance

    Pneumatic high pressure control valve Flow characteristic Linear, percentage
    Allowable range 50: 1 (CV<6.3 30: 1)
    Rated Cv value Percentage 1.6~630/ linear CV1.8~690
    Pneumatic high pressure control valve  
    Allowable leakage
    Metal seal:  IV grade(0.01% rated capacity)
    Soft seal: VI grade(foam grade)
    Leakage standard:  GB/T 4213
    Pneumatic high pressure control valve Performance
    Intrinsic error(%) ±1.5
    Return difference(%) ≤1.5
    Dead zone(%) ≤0.6
    Difference from beginning to end point(%) ±2.5
    Rated travel difference(%) ≤2.5
  • Pneumatic high pressure control valve special requirment

    Special test Material penetration flaw detection (PT), radiator test (RT), flow characteristic test,
    low temperature test.
    Special treatment Trim nitrogen treatment, seat hard alloy treatment.
    Special rinse Degreasing and dehydration treatment
    Special condition Special piping or connection, vacuum condition, S.S fastener, special coating.
    Special dimension Customized face to face length or dimension
    Test and inspection Third party test report
  • Pneumatic high pressure control valve actuator parameter

    Pneumatic high pressure control valve 
    Type\ Method
    Pneumatic diaphragm actuator
    Multi-spring type
    Usage Regulating type, ON-OFF type
    Air supply pressure or Power supply voltage Air supply pressure (Spring range)
    140(20~100)Kpa G
    240 (40~200) Kpa G
    280 (80~240) Kpa G
    Connector Air pipe connector: RC1/4
    Direct action Pressure increase, stem descend, valve close.
    Reaction Pressure increase, stem ascend, valve open.
    Input signal 40~20mA.DC(with positioner)
    Lag ≤1%FS(with positioner) 
    Linear type 2%FS(with positioner)
    Environmental temperature -10℃~+70℃
    Pneumatic high pressure control valve Accessories E/P, P/P valve positioner, filter regulator, valve converter, solenoid valve, limited switch
    Non-standard accessories, need special customized notes.

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