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SHANGHAI HUIXUAN VALVE

Mobile:+86-17717520739
Wechat:17717520739
Email:info@shxvalve.com

Address: NO.720, Suide Road, Jiading District,Shanghai, China.
 

Pneumatic flow regulating valve

Model:

  • Port size:DN25~300, NPS 1〞~ 12〞
  • Pressure:PN16 ~ 100,150LB ~ 600LB
  • Medium:Water,liquid,air,gas
  • Temperature :-196~450℃
  • Body material:WCB LCB CF8 CF3 CF8M CF3M
  • Description:
  • Pneumatic flow regulating valve description

    Pneumatic flow regulating valve is a top entry globe type valve.The body of channel Pneumatic flow regulating valve is streamlined by S shape with low pressure loss, high capacity,wide regulating range, and high accuracy in flow characteristics. Pneumatic flow regulating valve plug features with guiding area and good vibration resistance. Pneumatic flow regulating valve is equipped with mult-spring diaphragm actuator and compact in structure as well as big in output force. Pneumatic flow regulating valve is designed to control a broad variety of fluids, like steam, water, most of the medium and gases.
  • Pneumatic flow regulating valve feature

    Reduced trim can be chosen to provide wide capabilities for site applications
    Balanced trims are suitable for high pressure drop and shutoff
    Hardened trims to handle high pressure drop applications
    Bellows seal for special medium
    Extended bonnet for low temperature
    Finned bonnet for high temperature
    Higher maximum valve flow coefficients
    Bigger body volume to reduce cavitations 
  • Pneumatic flow regulating valve Specification

    Pneumatic regulating valve
    Body type:
    straight through casting globe type
    Spool type: non-balanced single seat plug type
    Nominal size: DN20~200,、 NPS 3/4〞~ 8〞
    Nominal pressure: PN16 ~ 100、 CLASS 150LB ~ 600LB
    Connection: flange: FF、RF、MF、RTJ
    Welding: SW、BW
    Flange dimension: According to to IEC 60534
    Pneumatic flow regulating 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
    Regulating control valve Actuator: Pneumatic: multi-spring diaphragm actuator, piston type actuator.
  • Pneumatic flow regulating valve Structure

  • Pneumatic flow regulating valve Material 

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

    Pneumatic flow regulating valve
    Flow characteristic
    Linear, percentage, quick open
    Allowable range 50: 1 (CV<6.3 30: 1)
    Rated Cv value Percentage CV1.6~630 ,linear CV1.8~690
    Pneumatic regulating valve Allowable leakage Metal seal:  IV grade(0.01% rated capacity)
    Soft seal:  VI grade(foam grade)
    Leakage standard:  GB/T 4213
    Pneumatic flow regulating 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

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