Actuators

Pneumatic actuators

An actuator or actuator is simply a 'motor' used to operate the valve. Actuators are intended for on/off or control. The design of the actuators is mainly divided into two types, 90° actuators or multi-turn actuators.

Filter

Magnetic valve Polyamide Namur

Prisma pneumatic actuators type PP

Prism pneumatic actuators type PA

Magnetic valve Namur

Speed control

Valve positioner (positions)

Terminal box

Polyamide end box

Pneumatic actuators are available in two versions: double-acting or single-acting. With a double-acting actuator, you need to push air into the actuator to both close and open. With a single-acting actuator, air is only needed in one direction, the other direction is controlled by springs. Pneumatic actuators are also available as multi-turn actuators and are mainly used for control valves.

A solenoid valve is often used to control the air supply during on/off operation. The position of the actuator is indicated by means of inductive or mechanical limit switches.

In control, a valve positioner is used to communicate with the actuator. There are several different options for control, usually 4-20 mA or a communication protocol called fieldbus. These are available in different standards, such as Profibus, MODbus or HART.