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Cryogenic Gate Valve -198 Deg C
Technical Summary
Szie Range: 1/4"~24"(DN6~DN600)
Series in Range: Globe valve, Etc.
Application: Air separation plants, LNG storage and distribution, LNG Transportation, Liquid and Gaseous Oxygen for steel production, Etc.
Pressure Range: 150LB ~ 2500LB, PN10~PN64
Temperature Range: -198 Deg C
Material: Austenitic Stainless steel, ASTM A351, ASTM A182, Etc.
End Connections: RF, RTJ. FF, Butt Welded, Extended Butt Welded, Etc.
Standards: BS 1873, Etc.
Operation: Lever / Handwheel, or gear operated, Pneumatic or Electric Actuated. Etc.
| Design reference | API | ASME | |
| Design standard | API 600 | ASME B16.34 | |
| Flanged ends | Thread ends | BW ends | |
| ASME B16.10 | ASME B16.11 | ASME 1.20.1 | |
| Flanged ends | ASME B16.5 | ||
| Test & Inspection | API598 | ||
Cryogenic Definition:
Cryogenic method: soak the parts to be processed into liquid nitrogen tank for cooling, when parts of 198 degrees centigrade temperature reaches-, start insulation 1 ~ 2 hours, then remove the carton natural treatment to room temperature, repeat cycle twice.
Low-temperature parts into liquid nitrogen tank insulation a certain length of time, to reduce its due to temperature differences andmetallographic changes resulting from the deformation,which increases when the low-temperature valve sealing performance of a processing method.
As a general rule, use of the valve below 101C, before finishing the main part for cryogenic. But if the user requires, above-101.C working temperature valve parts for cryogenic.
