Structure composition and working principle of pneumatic thin film actuator

Pneumatic thin film actuator is a type of pneumatic actuator that has the characteristics of fast response, precise control, and high reliability. It is an indispensable part of industrial automation control. Below, we will provide a detailed introduction to the structure, composition, and working principle of the pneumatic thin film actuator.
Structure composition of pneumatic thin film actuator:
1. Thin film head: This is the core part of the actuator, consisting of an upper diaphragm and a lower diaphragm, with a spring in the middle. Compressed air entering the film head will push the film to move.
2. Execution rod: Connect the diaphragm and valve stem, and drive the valve stem through the movement of the diaphragm.
3. Spring: Used to provide resetting force. When the compressed air supply stops, the spring will reset the diaphragm and actuator to the initial position.
4. Air source interface: used to connect the inlet of compressed air and control the inflow and outflow of compressed air.
Working principle of pneumatic thin film actuator:
When the control system sends a signal, compressed air enters the upper or lower part of the film head through the air source interface. According to the direction of intake, compressed air will push the upper or lower diaphragm to move, thereby driving the actuator rod to move up and down. The movement of the actuator will directly drive the connected valve to open or close.
The above is an introduction to the structure and principle of pneumatic diaphragm actuators. Currently, this product is widely used in industries such as chemical, petroleum, metallurgy, and power, especially in situations where precise control of fluid flow and pressure is required, such as regulating valves, globe valves, and butterfly valve.

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