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    What's safety valve
    time:2011-07-10  |  visits:569  |  tags:safety valve,,,
    Detail:

    Safety valve is for preventing the medium pressure in the pipe or device from exceeding the set pressure, achieving pipe safety.
    Safety valve is one type of valve for safety protection. Safety valve on-off part is normal close under the effect of external force, when the medium pressure in the pipe or device increases and exceeds the set pressure, the safety valve will open automatically to discharge medium outside of pipe or device, achieving protecting the pipe or device. Safety valve belongs to automatic type of valve. Safety valve is mainly applied to boiler, pressure vessel and pipe to control the medium pressure into it not to be over set pressure, protecting of people or equipment safety.
    Safety valve can be divided into low lift safety valve and full lift safety valve according to safety valve disc lift. Low lift safety valve disc lift is ≤0.05d0 (minimum discharge orifice size), while full lift safety valve disc lift is ≤0.25d0 (minimum discharge orifice size).
    According to structure, safety valve can be divided into hammer type safety valve, lever type safety valve, spring loaded type safety valve and pilot type (pulse) safety valve. According to body structure, safety valve can be divided into closed type safety valve and non-closed type safety valve. The discharged medium of closed type safety valve does not leak out, but discharge to designated location, so closed type safety valve is normally applied to poisonous and corrosive medium. Non-closed type safety valve is normally applied to air and steam. When selecting safety valve, it should depend on actual sealing pressure. As for spring loaded type safety valve, there are several working pressure springs for selecting in only one nominal pressure range, so when ordering, please note the safety valve model, safety valve name, safety valve medium, safety valve temperature and safety valve actual sealing pressure.
    Safety valve should be mounted vertically. There should be no resistance on the safety outlet. Before mounting, should take test on the safety valve, and check on the safety valve sealing. During the operation, should tale timely check on the safety valves.

     
       
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