Pneumatic control valve is to use compressed gas as power source, cylinder as actuator, and with the help of valve positioner, converter, solenoid valve, position retaining valve, gas storage tank, gas filter and other accessories to drive the valve, realize the switching value Or proportional adjustment, receiving the control signal of the industrial automation control system to complete the adjustment of the pipeline medium: flow, pressure, temperature, liquid level and other process parameters. Pneumatic control valve is characterized by simple control, fast response, and intrinsic safety, without the need for additional explosion-proof measures.