What is the role of the pneumatic valve pneumatic insurance?

keep a pneumatic valve pneumatic valve is a protective device. When the instrument air pressure interrupt or air supply system failure occurs, the position of pneumatic valve can automatically cut off the regulator and regulating air chamber or pneumatic valve pneumatic valve positioner output and adjust the passage between the air chamber, the regulating pneumatic valve pneumatic control valve position to maintain the original position, to ensure that the adjusting process parameters unchanged in the circuit. In this way, the medium effect of modulated interrupt, fault elimination, the position of pneumatic valve immediately return to normal position.