Valve Examination Bench Performs The Valve Seal Leak Test
Whether making use of a brand-new valve or using a repaired valve, a pressure examination leakage must be done making use of a Valve Tester Bench before installment.
Valve pressure examination by the Valve Testing Board describes the valve body toughness test. Drip examination describes the rigidity test of the securing surface area. These 2 examinations are the inspection of the primary efficiency of the valve.
The examination tool is generally tidy water at room temperature, and kerosene can be used for vital valves. The safety valve consistent stress examination can utilize nitrogen to stabilize the gas or utilize heavy steam or air rather. For diaphragm valves, the air is utilized for screening.
First, the valve examination pressure
The small stress arrays from 0.4 Mpa to 32Mpa. These usual stress valves have a valve stamina test pressure of 1.5 times their nominal pressure.
The valve seal test stress is equal to 1.1 times the nominal pressure.

Second, the valve test technique
The examination pressure examination of the valve is executed on the valve examination bench. The structure of the valve test bench has a pushing component on the examination stand and a pipe attached to the examination pump beneath. After the valve is pushed, the stress test pump works. From the pressure gauge of the pressure test pump, the pressure of the valve can be read. When the valve is pressurized and also full of water, the air in the valve ought to be drained. The upper-pressure plate of the examination bench has a venting hole and is opened and gathered a small valve. The sign of air venting is that every one of the vents is water.
After the vent opening is closed, the boost is begun. The improving process ought to be slow and also not sharp. After reaching the defined pressure, keep it for 3 mins, and also the stress is not qualified.
3 steps of valve pressure test leakage examination:
1. Open up the valve flow, load the valve cavity with water (or kerosene), and enhance the stress needed for the stamina test to check whether the valve body, valve cover, gasket, and packaging have leakage.
2. Close the dead valve course, pressurize the valve to the small pressure, and check for leaks from the opposite side.
3. Transform the valve upside down and also check the opposite side.