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How to test the valve for leak test

The basic steps of valve pressure test leak test:
1. Open the valve passage, fill the valve cavity with water (or kerosene), and increase the pressure required for the strength test to check the valve body, valve cover, gasket and packing for leakage.
2. Close the dead valve path, pressurize the valve to the nominal pressure, and check for leaks from the other side.
3. Turn the valve upside down and test the opposite side.

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