DZJHP Pneumatic cryogenic control valve, -196～45℃
Key Specifications / Features
Model No.: SJ-PCV-10 Hits: 256
DZJHP Pneumatic cryogenic control valve, -196～45℃
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Detail Information
- Pneumatic 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 cryogenic control valve to ensure reliability of the stem packing & sealing.Pneumatic cryogenic control valve temperature rating: -196°C ～+ 45 °C.
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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. -
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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 -
Casting Forging Materials Lowest working
temperatureMaterials Lowest working
temperatureA352 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 control valve
Flow characteristicLinear, 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 control valve Allowable leakage Metal seal: IV grade（0.01% rated capacity）
Soft seal: VI grade（foam grade）
Leakage standard: GB/T 4213Pneumatic 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 -
Control Valve Type\ Method Pneumatic diaphragm actuator ZH23～ZH56 Multi-spring type Usage control 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 GConnector 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 control valve
AccessoriesE/P, P/P valve positioner, filter regulator, valve converter, solenoid valve, limited switch
Non-standard accessories, need special customized notes. -
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 control 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
