Whether using new valve, or the use of repaired valves must be installed before the pressure test leak.

Pressure test, refers to a body strength test. Leak testing, referring to the sealing surface tightness test, which two main performance test is to check the valve.

Test medium, usually water at room temperature, it is important valves can be used kerosene. Valve set pressure test, using nitrogen gas is more stable, can also be used instead of steam or air. For the diaphragm, the use of air as the test.

1.Test pressure

Valve pressure strength test, there is the following relationship with the nominal

Nominal pressure (Mpa)                Strength test pressure (Mpa)

         0.1                                                          0.2

        0.25                                                         0.4

         0.4                                                          0.6

         0.6                                                          0.9

         1.0                                                          1.5

         1.6                                                          2.4

         2.5                                                          3.8

         4.0                                                          6.0

         6.4                                                          9.6

        10.0                                                        15.0

        16.0                                                         24.0

        20.0                                                         30.0

        25.0                                                         38.0

        32.0                                                         48.0  

As seen from the nominal pressure from 0.4Mpa-32Mpa, these common pressure valve, the strength test pressure for 1.5 times.

Valve seal test pressure equal to the nominal pressure.

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