Actuator is an indispensable and important part of automatic control system. Its function is to accept the control signal sent by the controller and change the size of the controlled medium, thereby maintaining the controlled variable at the required value or within a certain range. Actuators can be divided into three categories according to their energy forms: pneumatic, hydraulic and electric. Electric actuators have convenient energy access and rapid signal transmission, but have complex structures and poor explosion-proof performance. Hydraulic actuators are basically not used in chemical, oil refining and other production processes, and are characterized by large output thrust.
More and more factories adopt automatic control, and manual operation is replaced by machinery or automation equipment. People require the actuator to play the interface role between the control system and the mechanical movement of the valve, and also require the actuator to enhance work safety performance and environment. Protection performance. In some hazardous situations, automated actuator devices can reduce personal injury.
