Cryogenic Check valve is one of the important flow control equipment in cryogenic pipeline systems, especially suitable for services requiring valves featuring high sealing performance, swift on-off and low flow-resistance. EDVC most advanced design principle and most stringent manufacturing standard to design and manufacture cryogenic Check valve which helps EDVC cryogenic Check valve build up a reputation for reliable sealing performance, low operation torque, high stability in cryogenic service and long lifespan. Presently, EDVC cryogenic Check valves have been installed in several LNG liquefaction plants and terminals.
Stainless Steel Cryogenic Swing Check Valve
Cryogenic valves are specially designed for gas treatment processes and storage and transportation of liquefied gasses such as LNG, liquid nitrogen, Oxygen,. Etc. These valves are required to be operated to give assured leakage rates. These valves which are recommended to use below -50⁰C are designed with a extended bonnet which separates the operator and stem seal from the cold temperature. 12” gas column is a standard feature for these valves. Extended bonnet as per MESC SPE 77/200 & SPE 77/209 can also be given.
The cryogenic check valves designed are suitable for working temperature of -196 ℃.By adopting the most advanced design concept, high precision processing control and strict process management, the ultra-low temperature valve has many outstanding advantages, such as reliable sealing, high stability at low temperature and long service life, etc. Products are widely used in liquefied natural gas, liquefied petroleum gas, air separation and other low-temperature industries.
- Size: 2″~24″(DN50~DN600)；
- Type: Swing Check, Piston Check, Wafer Type
- Rating: ASME CLASS 150~1500(PN16~PN250)；
- Design Std.: API594 BS6364 GB/T24925；
- Body material: Stainless steel
- Connection: RF, BW, RTJ
The main pressure containing components are treated with liquid nitrogen to stabilize dimensions and eliminate the stress caused by metal microstructure changes. Lip seals are used as a seals in these valves which are made up of different materials such as PTFE, KEL-F, etc, and it is self energized by an internal spring of stainless or Inconel alloy.