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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 extened bonnet cryogenic control valve

Model:

  • Port size:DN15~500, NPS 1/2〞~ 20〞
  • Pressure:PN16 ~ 100,150LB ~ 600LB
  • Medium:Nitrogen,Oxygen or others
  • Temperature :-196~150℃
  • Body material:CF8 CF3 CF8M CF3M or others
  • Connection:Flanged,butt weld is optional
  • Position type:Fail close or Fail open
  • Characteristic:Linear, Equal percentage
  • Voltage:Depond on accessories
  • Other:Extended shaft design
  • Pneumatic extened bonnet cryogenic control valve Feature

    Pneumatic extened bonnet cryogenic control valve is appiled for low tempreature conditions ,  such as for liquefied natural gas,liquefied petroleum gas, liquefied oxygen, liquefied nitrogen, liquefied hydrogen.Extended bonnet design of the Pneumatic extened bonnet cryogenic control valve to ensure reliability of the stem packing & sealing.Pneumatic extened bonnet cryogenic control valvetemperature rating: -196°C ~+ 45 °C.
  • Pneumatic extened bonnet cryogenic control valve Specification

    Pneumatic cryogenic control 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 control 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 control valveActuator: Pneumatic: multi-spring diaphragm actuator, piston type actuator.
  • Pneumatic extened bonnet cryogenic control valve Structure

    DZJHP Pneumatic cryogenic control valve Structure
  • Pneumatic extened bonnet cryogenic control 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 control 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 extened bonnet cryogenic control valve Performance

    Pneumatic extened bonnet cryogenic 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 extened bonnet cryogenic control valve Allowable leakage Metal seal:  IV grade(0.01% rated capacity)
    Soft seal:  VI grade(foam grade)
    Leakage standard:  GB/T 4213
    Pneumatic cryogenic 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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