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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 cryogenic regulating valve

Model:

  • Port size:DN20~300, NPS 3/4〞~ 8〞
  • Pressure:PN16 ~ 100,150LB ~ 600LB
  • Medium:Liquid nitrogen and other low temperature medium
  • Temperature :-196~45℃
  • Body material:LCB/LCC/LF2/CF8/CF8M/CF3M
  • Description:
  • Pneumatic cryogenic regulating valve Feature

    Pneumatic cryogenic regulating valve is used for liquefied natural gas,liquefied petroleum gas,liquefied oxygen,liquefied nitrogen,liquefied hydrogen.Extended bonnet design of the Pneumatic cryogenic regulating valve to ensure reliability of the stem packing & sealing.Pneumatic cryogenic regulating valve temperature rating: -196°C ~+ 45 °C.
  • Pneumatic cryogenic regulating valve Specification

    Pneumatic cryogenic 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 cryogenic regulating valve Bonnet type:
    Ⅲ:Low temperature extended type(-196℃~ 45℃)
     
    Packing: V type PFTE packing, flex. graphite packing, etc.
    Gasket: Metal graphite packing
    Pneumatic cryogenic regulating valveActuator: Pneumatic: multi-spring diaphragm actuator, piston type actuator.
  • Pneumatic cryogenic regulating valve Structure

  • Pneumatic cryogenic regulating valve Material 

    Component name Control Valve Material
    Body/Bonnet LCB/LCC/LF2/CF8/CF8M/CF3M
    Valve spool/Seat 304/316/316L(overlaying stellite alloy)
    Packing Normal:-196~150℃ is PTFE
    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 cryogenic regulating valve Lowest working temperature 

    Casting Forging
    Materials Lowest working 
    temperature
    Materials Lowest working 
    temperature
    A352 LCB -46°C A350 LF2 -46°C
    A352 LCC -46°C -46°C
    A352 LC1 -59°C A350 LF5 -59°C
    A352 LC2 -73°C A350 LF9 -73°C
    A352 LC3 -101°C A350 LF3 -101°C
    A351 CF8 -254°C A182 F304 -254°C
    A351 CF8M -254°C A182 F316 -254°C
    A351 CF3 -254°C A182 F304L -254°C
    A351 CF3M -254°C A182 F316L -254°C
  • Pneumatic cryogenic regulating valve Performance

    Pneumatic cryogenic 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 cryogenic regulating valve Allowable leakage Metal seal:  IV grade(0.01% rated capacity)
    Soft seal:  VI grade(foam grade)
    Leakage standard:  GB/T 4213
    Pneumatic cryogenic 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
  • Pneumatic cryogenic regulating valve actuator parameter

    Control Valve Type\ Method Pneumatic diaphragm actuator
    ZH23~ZH56
    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 cryogenic regulating valve
    Accessories
    E/P, P/P valve positioner, filter regulator, valve converter, solenoid valve, limited switch
    Non-standard accessories, need special customized notes.
  • Pneumatic cryogenic regulating 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 Pneumatic cryogenic regulating valve
    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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