info@shxvalve.cominfo@shxvalve.com
Tel:+86-17717520739
Email：info@shxvalve.com
Address: NO.720, Suide Road, Jiading District,Shanghai, China.
Model：
| 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. |
| 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 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 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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