Abstract
This chapter focuses on key design considerations for designing industrial valves in cryogenic services. Various aspects of cryogenic valve design features like extended bonnet and stem, stem sealing and soft seat design with regards to extremely low temperature, drip plate design, body, bonnet and bonnet extension wall thickness calculation, connection types between body and bonnet, fire safe design, stem design to prevent buckling and torsion deflections, stem blow out prevention design types, cavity relief mechanism, operator design with regards to required force and torque for cryogenic valve operation are explained in details in this chapter. The chapter is ended with a case study related to cryogenic butterfly valves main design aspects like end connection, top or side entry, seat material, etc. The case study of cryogenic butterfly valves is related to a Norwegian valve manufacturer located approximately 1h driving from Oslo. Most of the cryogenic butterfly valves produced by the Norwegian manufacturer is exported to Korea.
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