Currently, the development of clean and low-carbon global energy has become a major trend, and LNG, as a clean and efficient energy source, is increasingly favored by the energy market and related industries, becoming one of the fastest growing energy industries in the world.
The most commonly used valves in LNG projects are: cryogenic ball valves, cryogenic butterfly valves, cryogenic globe valves, cryogenic check valves, cryogenic safety valves, cryogenic control valves, etc.
For valves used in LNG projects, the technical and design requirements are very strict.
The low temperature valve shall be equipped with extended bonnet, and the bonnet shall be of integral bolt-on structure.
Cryogenic valves shall be equipped with extended stems to ensure that the packing is at ambient temperature and all stems are of anti-blow-out construction.
Welded cryogenic valve valve internals should be easy to disassemble, especially the valve seat can be maintained online and easy to replace, the internals and seals can be quickly removed from the top of the valve and can be repaired online.
Valves with soft seal construction should be designed for fire protection.
All low-temperature fixed ball valves should be equipped with pressure relief devices.
Ball valves with external sealing structure, globe valves, etc. should have external sealing performance.
Valve body, inner parts, bonnet, stem, actuator, etc. shall be designed with anti-static structure.