Cast Stainless and High Alloy Cryogenic Valves
Applications such as liquefied natural gas, and other low temperature fluids, present special valve functionality challenges caused by extreme low temperature conditions. DSI® gate, globe and check valves for cryogenic services, are specially prepared and designed to overcome these challenges.
Appropriate component materials are utilized for body and trim, offering superior impact strength, excellent corrosion resistance and heat loss properties. An extended bonnet and gas column design is also normally employed to provide thermal insulation at the stem seal and stem packing area. At sufficient length, this design feature places the functionality of the stem seal in the vapor zone of the liquid media providing safe and continuous valve operation.
A variety of body, trim, seat and seal materials are available for use in cryogenic service. Customer specified options, such as body cavity vent hole, special extension lengths and Kel-F materials, are also available upon request.