It generally refers to a valve designed to operate at temperatures below -40°C (-40°F), used to control the flow of extremely low-temperature media such as LNG, liquid nitrogen, and liquid oxygen.
Why can't standard valves be used as replacements for cryogenic valves?
It is strictly prohibited. Materials of standard valves become brittle at low temperatures, leading to catastrophic failure; their seals will harden and fail; and without a pressure relief design, trapped liquid vaporizing in the body cavity can cause overpressure and explosion.
What materials are primarily used for cryogenic valves?
Primary materials include Austenitic Stainless Steel (e.g., 304L, 316L), Low-Temperature Carbon Steel (LF2), and special alloys like Monel and Inconel. Sealing surfaces are often hard-faced with Stellite.
Why must cryogenic valves be kept extremely clean and dry before installation?
Any residual moisture or oil will instantly freeze into ice or solid particles at cryogenic temperatures. This can jam moving parts (like the stem or ball), rendering the valve inoperable or damaging the sealing surfaces.
Gansu Shenleng Cryogenic Equipment Co., Ltd. is a professional supplier of cryogenic equipment containers, providing a variety of Industrial equipment to the world
Lanzhou New Area, Lanzhou City, Gansu Province, on the second floor to the east of New Harbor Road, to the east of Building Materials Road No. 2, to the west of Qilian Mountain Avenue (Jingqi Road)
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Lanzhou New Area, Lanzhou City, Gansu Province, on the second floor to the east of New Harbor Road, to the east of Building Materials Road No. 2, to the west of Qilian Mountain Avenue (Jingqi Road)