A pneumatic actuator is a device that converts energy from compressed air into mechanical motion to control the opening and closing of valves in industrial applications.

Pneumatic actuators utilize the force generated by compressed air to move a piston or diaphragm, which in turn operates the valve mechanism to open or close it.

Pneumatic actuators are relatively simple, cost-effective, and offer fast response times. They are also suitable for use in hazardous environments where electric actuators might pose a risk.

Pneumatic actuators require a source of compressed air, which may not be readily available in all environments. They also have limited precision compared to electric actuators.

An electric actuator is a device that uses electrical energy to control the movement of valves, typically through the rotation or linear motion of a motorised mechanism.

Electric actuators employ electric motors to generate the mechanical force necessary to operate valves. They can be controlled remotely and offer precise positioning capabilities.

Electric actuators provide precise control, high accuracy, and can be easily integrated with automation systems. They also eliminate the need for compressed air, reducing dependency on external resources.

Electric actuators may be more expensive upfront compared to pneumatic actuators. They also require a stable power supply and may not be suitable for certain hazardous environments.

A hydraulic actuator is a device that uses hydraulic fluid to create mechanical motion, typically through the extension and retraction of a piston, to control valve operations.

Hydraulic actuators utilise the pressure exerted by hydraulic fluid to move a piston, which in turn operates the valve mechanism. The flow of hydraulic fluid is controlled to achieve precise movement.

Hydraulic actuators offer high force capabilities, making them suitable for heavy-duty applications. They also provide smooth and precise motion control.