Industry news

Actuator related knowledge

2020-06-22

Actuators are an important part of process control. The role of the actuator is to receive the control signal sent by the controller, change the flow of the controlled medium, so as to maintain the controlled variable at the required value or within a certain range. The action of the actuator is realized by the output signal of the regulator through various actuators. The actuator consists of an actuator and an adjustment mechanism.

 

Actuators are divided into three categories: pneumatic, electric and hydraulic according to their energy forms. They have their own characteristics and are suitable for different occasions. With the continuous development of science and technology in recent years, various types of actuators are gradually moving towards the path of intelligence, and the emergence of intelligent valve positioners and fully electronic electric actuators used exclusively with pneumatic actuators has accelerated the intelligence of actuators. The development of technology has opened up a new world for the application of actuators.

 Actuator

Actuator classification

 

 

(1) Actuators are divided into pneumatic, electric and hydraulic actuators according to the driving energy used.

(2) According to the form of output displacement, the actuator has two types: corner type and linear type.

(3) According to the law of action, the actuator can be divided into three types: switch type, integral type and proportional type.

(4) According to the input control signal, the actuator can be divided into several types, such as air pressure signal, DC current signal, electrical contact on-off signal, pulse signal, etc.

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