Valve body leakage test system

The utility model discloses a valve body leakage test system, comprising a gas source, a programmable logic controller (PLC), an industrial control computer, a pressure controller used for maintaining pressure in a certain pressure scope in flow test, a flowmeter used for measuring valve body workpiece flow, a pressure transducer used for inducing pressure passing through a valve body workpiece and converting pressure into signals to output to the PLC, a cylinder used for fixing and plugging the valve body workpiece and an indicating device used for reacting whether test results of the valve body workpiece are qualified. The gas source is divided into two branches, wherein one branch is successively in series connection with the pressure controller and the flowmeter and is then in connection with a solenoid valve; the other end of the solenoid valve is in connection with the valve body workpiece; the other branch is in connection with the cylinder. The PLC is respectively in connection with the industrial control computer, the pressure controller, the flowmeter, the pressure transducer, the solenoid valve, the indicating device and the cylinder. The valve body leakage test system employs the PLC to control correlative electrical components to automatically complete valve body leakage test and has high work efficiency and test data accuracy.