Many people are not unfamiliar with pneumatic control valves. They mainly use compressed air as the power source, and use cylinders as actuators. They even use electrical valve positioners, converters, solenoid valves and other accessories to drive valves, which will eventually achieve on-off or proportional regulation. Of course, the pneumatic control valve is simple to operate, fast in response, and safe in nature, but what principles should be followed when installing? 　　　　

Wear of O-ring of pneumatic control valve During the use of pneumatic control valve, in order to ensure the sealing effect, O-ring must be equipped. However, if the O-ring is used for a long time, it is also easy to wear, which is definitely wrong. So during the inspection, carefully check whether the O-ring of the pneumatic control valve can continue to work and whether there is aging phenomenon.