Actuators are devices that move or control valves using a power source such as electricity, air, or hydraulics. They automate valve operation, enabling remote control, faster response, and enhanced system efficiency. Actuators are essential in modern industrial automation systems, particularly in process industries, water treatment plants, and power stations.

They are available in various types: electric actuators for precise control, pneumatic actuators for rapid response, and hydraulic actuators for high-force applications. Many come with fail-safe mechanisms and manual overrides for operational security. Integration with control systems allows real-time valve status monitoring and feedback.