There are five types of electric actuators
First, according to the type of valve to choose electric actuator
1, the angular travel electric actuator (corner "360 degrees) for butterfly valves, ball valves, plug valves and so on. Electric actuator output shaft rotation less than a week, that is less than 360 degrees, usually 90 degrees to achieve the valve opening and closing process control. Such electric actuator according to the different ways to install the interface is divided into direct-connected, base crank type two.
A) Direct connection: refers to the electric actuator output shaft and stem direct connection to install the form.
B) base crank type: refers to the output shaft through the crank and stem connected to the form.
2, multi-turn electric actuator (corner "360 degrees) for gate valves, globe valves and so on. Electric actuator output shaft rotation is greater than a week, that is greater than 360 degrees, generally need to be lapped in order to achieve the valve opening and closing process control.
3, straight stroke (linear motion) for single-seat control valve, two-seat control valve. Electric actuator output shaft movement of linear motion, not the rotation form.