Q347 Fixed ball valve – sealing at the inlet side; how to check for leaks at the valve seat under high pressure conditions
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May I ask how to observe seat leakage during the high-pressure sealing test for the inlet side seal of Q347 fixed ball valves? Thank you
During the high-pressure sealing test of the Q347 fixed ball valve, the leakage condition of the seat can be observed by checking for fluid leakage at the outlet end of the ball valve. First, ensure that the ball valve is in the closed position, then apply the specified test pressure to the inlet side. After a certain period of time, carefully inspect the outlet end of the ball valve as well as any other possible seams in the valve body to check for leaks of liquid or gas. If there is a leak, it indicates a problem with the valve seat seal. More precise methods such as acoustic detection instruments or leak detection equipment can also be used to assist in making judgments. .
If the middle chamber is equipped with a pressure relief valve or a plug, one of these can be removed to serve as an observation port. If there are no connections in the middle chamber, it is possible only to observe the drop in pressure on the pressure gauge to make a judgment (this approach can easily lead to misjudgments)
The central vent seems to be suitable only for inflating bubbles with soap; it’s not good for measuring water pressure
Use a tube for drainage to confirm; it’s the same