Let's make a comparison between the electric ventilation butterfly valve and the pneumatic ventilation butterfly valve, so that we can clearly see which is better or worse. However, we should not care too much about the disadvantages, because everything has its disadvantages.

Advantages of electric ventilation butterfly valve: easy access to energy, fast signal transmission speed, long distance, convenient centralized control, high sensitivity and precision, easy to cooperate with instruments, simple installation wiring.

Pneumatic advantage: the pneumatic ventilation butterfly valve receives the continuous air signal, outputs the linear displacement (also can accept the continuous electric signal after the electrical/gas conversion device), has the positive and reaction function. High reliability, after the interruption of gas source valve can be maintained or reset (add accessories). Simple maintenance and maintenance, good adaptability to the environment. High output power. It has anti-explosion function (with anti-explosion locator). Short action time, quick reaction, can be used for quick cutting, adjustment, low cost, suitable for different occasions.

Disadvantages of electric ventilation butterfly valve: the structure is complex, there are many failure points, and the average failure rate is much higher than that of pneumatic butterfly valve. The technical requirements of field maintenance personnel are high. Switch adjustment runs slowly. If the adjustment is too frequent, it will take a long time for the regulator to output a signal from the regulator to move to the corresponding position in response to the regulator valve. It is especially suitable for places with low explosion protection requirements and lack of air source.

Pneumatic defect: need clean air source. It needs accessories to be matched to realize switch and adjustment functions. The dual function pneumatic actuator cannot return to the preset position after the air source is cut off.

Therefore, customers need to know how to choose, before buying.

The article comes from: http://www.m.flextechsz.com