pneumatic control valve

     Pneumatic regulating valve, also known as pneumatic control valve, is a device widely used in industrial process control. It uses compressed air as a power source, uses a cylinder as an actuator, and cooperates with valve positioners, converters, solenoid valves, holding valves, gas storage tanks, gas filters and other accessories to adjust process parameters such as flow rate, pressure, temperature, and liquid level of pipeline media. The characteristics of pneumatic control valves include simple control, fast response, and usually do not require additional explosion-proof measures due to their inherent safety.

Working principle
    Pneumatic control valve consists of an actuator and a regulating mechanism. The actuator generates thrust to drive the regulating mechanism, which directly contacts the regulating medium and regulates the flow rate of the fluid. The actuator of a pneumatic control valve is usually a pneumatic piston actuator, which uses the action of compressed air to drive the crank arm to rotate 90 degrees through the movement of the piston, thereby achieving the opening and closing of the valve

Advantage
    Simple structure: Pneumatic control valves usually have a simpler structure, making them easy to install and maintain.
    Reliable and stable operation: Pneumatic control valves have high reliability in operation, especially suitable for situations that require quick response.
    High output force: Compared to electric control valves, pneumatic control valves can provide greater output force.
    Cheap price: The cost of pneumatic control valves is usually lower than that of electric control valves.
    Fire and explosion prevention: Pneumatic control valves are more suitable for flammable and explosive environments because they do not involve power supply.

Compared with other valve, pneumatic control valves focus more on regulating functions, while gate valve, globe valve, and ball valve focus more on opening and closing functions. Although butterfly valve can also be used for regulation, their main advantages lie in their lightweight structure and cost-effectiveness. When choosing the appropriate valve, specific application scenarios, control requirements, and economic factors need to be considered.