Pneumatic Bellow Seal Cryogenic Control Valve
Pneumatic Bellow Seal cryogenic Control Valve is a kind of control valve used in low temperature and cryogenic occasions. The difference from normal temperature is that the long-neck upper bonnet is adopted, and the flow channel of the valve body is S-streamline.
Description
Product Information
Pneumatic bellow seal cryogenic control valve is a kind of control valve used in low temperature and cryogenic occasions. The difference from normal temperature is that the long-neck upper bonnet is adopted, and the flow channel of the valve body is S-streamline. The function of the long-neck connection is to seal the valve stem to work at close to normal temperature and reduce the introduction of external heat energy. In order to reduce the transmission, the long neck adopts a thin-walled structure, so that the filler works at normal temperature. It is suitable for the adjustment of medium (such as liquid oxygen, liquid nitrogen, etc.) under the low temperature and strong state of -60 ~ -196 °C.
Main technical parameters
Nominal diameter: 15-400mm, 1/2”~16”
Nominal pressure: 1.6-42.0Mpa or 150LB-2500LB
Bonnet form: low temperature type -10～-196℃, ultra-low temperature type -196～-250℃
Gland form: bolted type
Sealing packing: V-type PTFE packing, V-type flexible graphite packing
Spool form: single seat type, sleeve type
Flow characteristics: equal percentage, linear
Function form: air-closed type (B)—valve position open (FO) when air is lost; air-open type (K)—valve position closed when air is lost (FC)
Imported pneumatic cryogenic control valve actuator
Type: multi-spring membrane actuator
Spring range: 20～100 (standard), 40-200, 80-240, 20-60, 60-100KPa
Diaphragm material: rubber clip nylon cloth, ethylene propylene rubber clip nylon cloth
Air supply pressure: 140～400KPa
Air supply interface: RC1/4"
Ambient temperature: -30～+70℃
Valve action type
Air-to-close (B)--valve open (FO) when gas is lost; air-to-open (K)--valve to be closed when gas is lost (FC)
The pneumatic bellow seal cryogenic control valve can be equipped with accessories, air filter pressure reducer, position retaining valve, travel switch, valve position transmitter, hand wheel mechanism, etc.
Body Face To Face Lenth:
| PN16/ class150 | DN | 15 | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 550 | 600 |
| NPS | 1/2" | 3/4" | 1" | 1-1/4" | 1-1/2" | 2" | 2-1/2" | 3" | 4" | 5" | 6" | 8" | 10" | 12" | 14" | 16" | 18" | 20" | 22" | 24" | |
| lenth | 184 | 184 | 184 | 222 | 222 | 254 | 276 | 298 | 352 | 403 | 451 | 543 | 673 | 737 | 787 | 1016 | 978 | 978 | 1067 | 1295 |
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