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Ball valves are used extensively in cryogenic services, such as Liquefaction of natural gas, air separation, gas transport, pharmaceuticals and food processing.Cryogenic ball valves must be carefully designed for cryogenic service. The main consideration is the thermal contraction of the plastic seat materials. The shrinking of the seat will cause high operating torque. In some cases, the seat may be under high stress and split.
Commonly known cryogenic valve design guidelines and test specifications include the following:
Valves for cryogenic service 
MSS SP-134:
Valves for cryogenic service including requirements for body/bonnet extensions 
DIN EN 1626:
Cryogenic vessels - Valves for cryogenic service 
EN 12567:
Isolating valves for LNG 
EN 12300:
Cryogenic vessels - cleanliness for cryogenic service 
MESC SPE 77/200:
Valves in service below minus 50 degrees celsius 
MESC SPE 77/306:
Production testing of valves in low temperature services 

Cryogenic applications should be taken seriously, especially when these low temperature requirements are coupled with fire safe, fugitive emission and tight shutoff. Most cryogenic ball valves are made to order and to tight specifications. FTI Specialize in working from custom-made designs, producing high-quality valves, quickly, efficiently and economically.