What is an Actuator?
An actuator is an operator mechanism that automates the opening/closing operation of a valve. It is mounted on the valve and connected to the valve body. There are different types of actuators and these types have different applications. Power-driven actuators are basically divided into three.
Electric Actuator
Uses an electric motor to open and close the valve.
Pneumatic Actuator
Uses pneumatic systems driven by compressed air to open and close the valve.
Hydraulic Actuator
Uses hydraulic systems driven by pressurized fluid to open and close the valve.
All three types share the common feature of enabling valves to operate faster than manual operation. They are commonly used, especially in large valves. All actuators are powered by electrical energy. In addition to opening and closing the valve, actuators also allow for intermediate positions. Limit switch boxes, I-P converters, and positioners mounted on these actuators can track the open/closed position of the valve and transmit position information to the automation system.