info@shxvalve.com

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SHANGHAI HUIXUAN VALVE

Tel:+86-17717520739

Email:info@shxvalve.com

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

Pneumatic On Off Control Valve

Model:

  • Port size:DN15-DN300
  • Pressure:PN10-PN64 CL150-CL600
  • Medium:Water,steam,oil,etc.
  • Temperature :-29~450℃
  • Body material:WCB,WCC,WC6,WC9,CF8,CF8M,etc.
  • Connection:Flange
  • Position type:Flow to open,flow to close
  • Characteristic:Quick open
  • Voltage:Deponds on accessory
  • Other:no need positioner
  • Pneumatic On Off Control Valve Feature

    Pneumatic On Off  control valve  is used for shuting off function for low water,steam,oil,gas and other industry steam , the body can adopt globe structure, butterfly valve structure, ball valve structure,Pneumatic On Off Control Valve is equipped with multi-spring diaphragm actuator, with small size &large output force feature;Pneumatic On Off Control Valve is applicable for high temp, low temp & small pressure differential of front-after valve with requirement of high closure performance and reliability.
  • Pneumatic On Off Control Valve Specification

    Pneumatic on off control valve
    Body type:
    straight through casting globe type
    Spool type: non-balanced type or balanced 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 On Off 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
    Actuator: Pneumatic: multi-spring diaphragm actuator, piston type actuator.
  • Pneumatic On Off Control 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 On Off Control Valve Performance

    Pneumatic single seat control valve
    Flow characteristic
    quick open
    Allowable range 50: 1 (CV<6.3 30: 1)
    Rated Cv value Percentage CV1.6~630 ,linear CV1.8~690
    Pneumatic control valve Allowable leakage Metal seal:  IV grade(0.01% rated capacity)
    Soft seal:  VI grade(foam grade)
    Leakage standard:  GB/T 4213
    Pneumatic On Off 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 On Off Control Valve technical parameter

    Seat diameter(mm) 10 12 15 20 25 32 40 50 65 80 100 125 150 200
    Rated Cv Percentage 1.6 2.5 4.0 6.3 10 16 25 40 63 100 160 250 400 630
    Linear 1.8 2.8 4.4 6.9 11 17.6 27.5 44 69 110 176 275 440 690
    Nom. size Travel Option flow characteristic Cv. (★standard  ●recommanded  ○customized)
    DN20 16mm                    
    DN25                  
    DN32 25 mm                
    DN40                
    DN50                
    DN65 40mm                    
    DN80                  
    DN100                
    DN125 60mm                    
    DN150                    
    DN200                  
    Pneumatic actuator
    Diaphragm area, Ae(cm2)
    ZHA/B-22 ZHA/B-23 ZHA/B-34 ZHA/B-45
    350 350 560 900
    Action Spring range Metal sealing allowable pressure difference (MPa)
    Air open 20-100KPa 4.46 3.09 1.98 1.16 0.7 0.44 0.28 0.18 0.17 0.11 0.07 0.07 0.05 0.03
    40-200 KPa 6.4 6.4 5.94 3.34 2.14 1.31 0.84 0.53 0.51 0.33 0.21 0.22 0.15 0.09
    80-240 KPa 6.4 6.4 6.4 6.4 4.99 3.05 1.95 1.25 1.18 0.78 0.5 0.51 0.36 0.21
    Air close 20-100KPa 6.4 6.19 3.96 2.23 2.14 0.87 0.56 0.35 0.34 0.22 0.14 0.15 0.1 0.06
    40-200 KPa 6.4 6.4 6.4 6.4 6.4 5.86 3.64 2.3 2.21 1.43 0.91 0.95 0.66 0.37
    80-240 KPa 6.4 6.4 6.4 6.4 6.4 6.4 5.04 3.18 3.06 1.98 1.26 1.32 0.92 0.52




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