Control Valve,API 6A Valve,API 6D Valve-Cepai Group
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CEPAI GROUP CO., LTD.

Mobile:+86-17717522891
Wechat:17717522891
Tel:+86-21-54891500
Email:aires@cepai.com 

Headquarter: 15F, NO.2281, West Zhongshan Road, Shanghai, China.
Factory: No.333 West Jianshe Road, Jinhu Industrial Park, Huaian City, Jiangsu Province, China

pneumatic piston cylinder control valve

Model:

  • Port size:DN50~600, NPS 2〞~ 24〞
  • Pressure:PN16 ~ 100,150LB ~ 600LB
  • Medium:Water,oil,steam,gas
  • Temperature :-40~450℃
  • Body material:WCB WC6 WC9 CF8 CF3 CF8M CF3M
  • Connection:Flanged,butt weld is optional
  • Position type:Fail close or Fail open
  • Characteristic:Linear, Equal percentage, quick open
  • Voltage:Depond on accessories
  • Other:
  • pneumatic piston cylinder control valve description

    pneumatic piston cylinder control valve is piston actuator design for high pressue medium, pneumatic piston cylinder control valve is a top entry globe type valve with flange connection or welding connection and which is cage type seat.The body of channel pneumatic piston cylinder control valve is streamlined by S shape with low pressure loss, high capacity,wide regulating range, and high accuracy in flow characteristics. pneumatic piston cylinder control valve plug features with guiding area and good vibration resistance. pneumatic piston cylinder control valve is equipped with pistion actuator and compact in structure as well as big in output force. This pneumatic piston cylinder control valve is designed to control a broad variety of fluids, like steam, water, most of the medium and gases.
  • pneumatic piston cylinder control 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 piston cylinder control valve Specification

    pneumatic piston cylinder control valveBody 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 piston cylinder control valve Bonnet type: Ⅰ:standard type(-20℃~230℃)
    Ⅱ:Radiator type: (-45℃~ high than 230℃ occasion)
    Packing: V type PFTE packing, flex. graphite packing, etc.
    Gasket: Metal graphite packing
    control valve Actuator: Pneumatic: piston type actuator.
  • pneumatic piston cylinder control valve Material 

    Component name Control Valve Material
    Body/Bonnet WCB/A105/WC6/WC9/CF8/CF8M/CF3M
    Valve spool/Seat 304/316/316L(overlaying stellite alloy)
    Packing 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 piston cylinder control valve Performance

    pneumatic piston cylinder control 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 piston cylinder control valve Allowable leakage Metal seal:  IV grade(0.01% rated capacity)
    Leakage standard:  GB/T 4213
    pneumatic piston cylinder 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
     

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