What is the pressure test method of the safety valve?

 

    ① The strength test of the safety valve is the same as other valves, which is tested with water. When testing the lower part of the valve body, the pressure is introduced from the inlet I=I end, and the sealing surface is closed; when testing the upper part of the valve body and the bonnet, the pressure is introduced from the outlet El end, and the other ends are closed. If the valve body and bonnet have no leakage within the specified time, it is qualified.

 

    ② For the sealing test and constant pressure test, the general use medium is: the steam valve uses saturated steam as the test medium; the valve for ammonia or other gases uses air as the test medium; the valve for water and other non-corrosive liquids uses water as the test medium . Nitrogen is often used as the test medium for safety valves in some important positions.

 

What is the pressure test method of the safety valve?

 

    The sealing test is carried out with the nominal pressure value as the test pressure, and the number of times is not less than twice, and no leakage within the specified time is qualified. There are two leak detection methods: one is to seal the joints of the safety valve, and use butter to seal the tissue paper on the flange. The plastic plate or other plate is sealed on the lower part of the outlet flange, and the valve disc is sealed by filling with water, and it is qualified if the water does not bubble.