Fault 8: The actuator vibrates and beeps. Treatment method: mainly because the sensitivity is adjusted too high, the insensitive area is too small and too sensitive, which causes the small circuit of the actuator to be unstable and produce oscillation. Adjust the sensitivity potentiometer counterclockwise to reduce the sensitivity; The fluid pressure changes too much, and the actuator thrust is insufficient; If the control valve is selected too large, the valve often works at a small opening. 　　

Second, the selection of appropriate pneumatic butterfly valve accessories requires principled selection. The so-called principle is to ensure the spirit of simplicity. Accessories play a complementary role and ensure the operation of the butterfly valve. Therefore, when selecting only what is needed, it is unnecessary to select what is not needed, which will increase the cost and price, and also increase instability factors, It is not appropriate not to choose an accessory that seems unimportant. The structure of pneumatic butterfly valve is very simple, so each accessory plays an important role. The selection of accessories for pneumatic butterfly valves is not optional, and it needs to follow certain principles to ensure its safety and economy.