The electrical positioning component mainly compares the supply value of the component position with the actual value. This comparison operation will be carried out in the micro processing component. The micro processing component will output an electric control command to the piezoelectric component according to the deviation of the control limit. The piezoelectric component will convert this command into aerodynamic force to determine the number of position increases. If the control limit values are very different, Then the piezoelectric components will transmit continuous signals. If the difference between the control limit values is small, then the fixed pulse transmission will not be carried out on the pneumatic butterfly valve,

The butterfly valve can be selected when there are two position conditioning, necking ground channel, low noise, cavitation and gasification, a few leakage to the atmosphere, and abrasive media.