Pneumatic valve has a larger action moment than electric valve. The switch action speed of pneumatic valve can be adjusted. The structure is simple and easy to maintain. Due to the cushioning characteristics of the gas itself, it is not easy to be damaged due to jamming during the action. It has a gas source and its control system is also More complicated than electric valves.

Pneumatic valves are sensitive, safe and reliable. Many factories with high control requirements set up compressed air stations for pneumatic instrument control components. Electricity means electricity.

The function of the pneumatic valve positioner is to receive the output signal of the pneumatic regulator, and then generate a pneumatic signal proportional to the output signal of the regulator to control the pneumatic regulating valve.

There are many types of pneumatic valve positioners. According to their working principles, they can be divided into two categories: displacement balanced and force (torque) balanced.