Numerical calculation of the opening response process of cryogenic safety valves

Safety valve is a kind of valve that opens by the medium’s own pressure without external force. Affected by the medium temperature steel safety valve in the low temperature environment, its performance state will produce great changes. This paper adopts the method of numerical calculation, the use of dynamic mesh technology on the spring type low temperature safety valve response process transient simulation. Furthermore, the study of low temperature safety valve open instant dynamic characteristics discusses the safety valve in the opening transient different moments of the parameters of the flow field changes, got in the low temperature environment safety valve open transient safety valve flow channel pressure, temperature and fluid velocity change rule. Elucidated the valve flap by the hydrostatic pressure, spring force, and the valve flap moving speed with the opening process changes and the influence of each other.