• Follow us
Home > Knowledge > Content
Single and double acting pneumatic actuator operating principle
Nov 28, 2017

Pneumatic Actuators, also known as pneumatic actuators or pneumatic devices, but the popular name for the pneumatic head, which is the use of gas to pressure-driven opening and closing or regulating valve actuator. Pneumatic actuator Relative to the electric actuator, the execution speed is very fast, the fastest up to 0.05 seconds / time! Pneumatic actuators according to the role of different forms are divided into single-role and double-role, the difference between the two and the principles are not the same!

Double-acting actuator is mainly open air off type, that is, whether the valve is open or closed are required to use air, usually manifested as open ventilation, ventilation closed, the gas source is lost, the valve remains in the state, the gas source reconnection After the valve can continue to work.


The single-acting actuator has the function of spring return. According to the working conditions, the normally open type and normally closed type can be selected. Case 1: The ventilation is on, and when the gas source is lost, it is automatically reset to the initial closed state. Case 2: Ventilation is off, and when gas is lost, it automatically resets to the initial on state.


Double-acting pneumatic actuators are generally used in leaks less demanding conditions, and single-acting pneumatic actuators are used in dangerous conditions more, you can lose gas source goods in the event of a sudden failure, the valve Close or open quickly. In terms of price, a single-acting pneumatic actuator will be more effective than a double-acting one.