Classification of valve actuators

Actuator classification：

(1) The actuators are divided into three types based on the driving energy used: pneumatic, electric, and hydraulic actuators.

(2) According to the form of output displacement, there are two types of actuators: angular and linear.

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

(4) According to the input control signal, actuators can be divided into several categories, such as air pressure signal, DC current signal, pulse signal, etc.