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Pneumatic control valve by the pneumatic actuator and control valve composed of two parts. Actuator is the actuator of the device, which uses compressed air as the driving force, the output thrust; regulator valve is the actuator part of the adjustment, direct contact with the media to regulate the flow of media. As the pneumatic control valve has the advantages of simple structure, reliable operation, large output thrust, easy maintenance, fire prevention, explosion protection and low cost, the pneumatic control valve is widely used in the automatic adjustment of industrial processes such as chemical industry, petroleum, metallurgy, electric power, Remote control. Pneumatic control valve in the nominal pressure and temperature range can be adjusted for a variety of liquids, gases and vapors, pneumatic valve closed when the leakage is small. Pneumatic valve by the role of implementing agencies can reach the gas open or gas closed the purpose.