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A valve is simply a device that directs or regulates flow by opening, closing or partially obstructing passageways.
Depends on the valve type and style.
Plug valves are valves with cylindrical or conically tapered "plugs" which can be rotated inside the valve body to control flow through the valve.
High temperature and high pressure valve is an automatic pressure relief protection device opened by inlet static pressure and it is one of the most important safety accessories of pressure vessels.
In order to improve the resistance to erosion and wear of ultra-high pressure valves, corrosion resistant materials are usually selected:
In order to prolong the service life of high pressure valve, the working condition must be considered.