Pneumatic control valves use compressed air as the power source, a cylinder as the actuator, and utilize accessories such as positioners, converters, solenoid valves, holding valves, air tanks, and gas filters to drive the valve for either on/off or proportional control. They receive control signals from industrial automation control systems to regulate various process parameters of the pipeline medium, including flow rate, pressure, temperature, and liquid level. The features of pneumatic control valves are their simplicity in control, rapid response, and intrinsic safety, eliminating the need for additional explosion-proof measures.