Double Acting Pneumatic Actuator For Ball Valve With Limit Switch

Pneumatic actuators are devices that convert the energy of compressed air or gas into a mechanical motion that regulates one or more final control elements. They are used as a form of automation control to reduce mandatory human interaction with a system’s internal mechanisms, which is particularly beneficial for automatic modulation and emergency shutdowns.

The motion of a pneumatic actuator may be linear or rotary depending on the device’s design. Prototypical actuators use an external compressive force, such as compressed air or gas, to move a piston along the inside of a hollow cylinder and build pressure. This generates a linear force relative to the piston’s pressure differential multiplied by its surface area, which is used to move a load along a straight line. So-called linear pressure actuators have been in service for decades but enhancements in diaphragm design and sealing capabilities have vastly improved the technology’s efficiency and scope of functionality.

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