Valve Test Bench valve sealing test:

(1) Fix the valve to be tested.

(2) Open the left pressure relief valve, close the right pressure relief valve, open the low pressure water pump switch, until the water flows out from the left pressure relief port, close the valve opening and closing part to the pressure gauge pointer to start the action, and close the low pressure water pump.

(3) Press the “Boost On” button, then rotate the pressure adjustment switch clockwise to make the test pressure gauge reading reach the value to be tested. Press “Hydraulic Stop” to stop the pressurization. If there is no special requirement, the pressurization process will be The number of pressures can be found in the table in the fourth item. If the stroke of the booster cylinder is not enough to increase the test pressure to the predetermined pressure, the system will automatically repeat the boost.

(4) We judge whether the valve to be tested is qualified by the pressure drop during the duration of the test.

(5) Open the right pressure relief switch to return the test pressure to zero. Then turn the pressure adjustment knob counterclockwise to make the system pressure less than 0.5 MPa.

(6) Press the “release” button, turn the pressure adjustment knob clockwise to release the valve to be tested, and then rotate the pressure adjustment switch counterclockwise to make the system pressure less than 0.5MPa.

(7) Hang the valve to be tested. This completes the inspection of a valve.

The Valve Pressure Test Table tests the strength of the valve housing and the sealing performance of the upper seal:

(1) According to the diameter of the valve to be tested, install a suitable sealing ring on the sealing disc.

(2) Place the valve to be tested between the two sealing discs. Then press the “tighten” button to clamp the valve to be tested. The clamping force is detected according to the comparison table.

(3) Unscrew the valve opening and closing member; close the right pressure relief valve, open the left pressure relief valve, open the low pressure water pump switch and inject water into the valve to be tested, until the water flows out from the left pressure relief hole. Then close the left pressure relief valve. The pressure gauge pointer starts to move and the low pressure water pump is turned off.

(4) Then perform a boosting operation.

(5) Open the valve test stand to the left or the right pressure to relieve the pressure. The pressure release process is the same as the valve seal test.

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