Pneumatic valve operating force distance is larger than electric valve, pneumatic valve switching action speed can be adjusted, simple structure, easy maintenance, due to the buffer characteristics of the gas itself during operation, not easy to be damaged due to jamming, there is 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 compressed air stations for pneumatic instrument control components. Electricity is electricity.
 
The role of the pneumatic valve positioner is to receive the output signal of the pneumatic regulator, and then generate a pressure signal proportional to the regulator output signal 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 types: displacement balance type and force (torque) balance type.