Leakage test apparatus for simulating the gas valve and test methods

The present invention discloses a test device and test method for simulating a gas leak in the valve, it belongs to the field of petrochemical leak detection equipment, including an air compressor, a tank, a buffer tank, the test set of valves, differential pressure gauge, the reference tank, a thermometer , air compressor control system, a first pressure regulating valve, a second pressure regulating valve, the first valve, the second valve, the third valve, the first meter valve, the second meter valve, the third and the sixth valve instrument "8 "blind font. The present invention mimics valve leakage using a pressure regulating valve downstream of the control valve test, petrochemical production process can simulate the real conditions of the valve, formed by algorithm analysis empirical test data can be used to directly under similar working conditions the drain valve diagnostics, and to overcome the size categories of the prior art is limited by the scope of the flowmeter, the valve simulation expanded, has a wide scope of application, ease of operation and the test cost savings and other advantages.