First, the equipment installation: school equipment level or use concrete to fix the foot bolts.
Second, select N32-46# ordinary hydraulic oil, N32-46# anti-wear hydraulic oil or 20-30# mechanical oil, inject into the fuel tank, the oil quantity can not be lower than the lower limit of the oil level gauge.
Third, turn on the power, press the oil pump start button, check the motor rotation direction, whether it is correct (clockwise direction) after 5-1 O minutes no-load operation, adjust the oil pump pressure at 50 MPa to test the machine, various actions, check each There is no leakage in the pipeline, and if any defects are found, it should be stopped immediately.
Fourth, the valve test machine test medium: water has the advantages of convenience, does not pollute the environment, so it is widely used, to ensure that the test valve will not corrode and the requirements of the test machine media. In the water tank, a rust inhibitor or a common oil is added as a test medium.
5. When the valve testing machine tests the valve, firstly according to the test pressure of the tested valve, it is required to refer to the pressure value of the hydraulic compression system in the “pressure gauge for the compression cylinder” to adjust the pressure of the boosting pressure. To prevent deformation and damage of the valve under test.
6. Before starting the hydraulic pressure pump, adjust the electric contact pressure gauge to the same pressure as the tested valve, and then work. Cast iron valves shall not be hammered. During the test, the operator should pay attention to safety and correct use. Pay special attention to the damage of the medium pressure when testing the cast iron valve. After the valve test is completed, the pressure in the valve should be exhausted before the axial direction can be relaxed. press.
7. The pressure gauge of the pressure test device of the valve tester must be qualified by the local metrology department. The certificate of conformity shall be within the validity period. The range of the pressure gauge shall not be lower than the test pressure by 15 times, and the accuracy shall not be less than 1.5.
