Selection And Classification of Valve Electric Actuator
Mar 26, 2016
Type of valve is considerable, working principles are not the same, generally achieve open and close control is by turning the angle of the valve plate, lifting the valve plate and other manners. We should be selected suitable electric actuator according to the type of valves.
Usually there are three electric actuators.
1. Rotary electric actuator (angle <360 degrees)
Rotation of electric actuators output shaft is less than a circle, usually 90 degrees can achieve the control valve opening and closing process. Such actuators are divided into direct-attached, base crank according to different mounting interface methods. Such actuators apply to butterfly valve, ball valve, plug valves and so on.
2. Multi-turn actuator (angle> 360 degrees)
Rotation of electric actuators output shaft is more than a circle, that is greater than 360 degrees, it generally takes multi-turn to achieve control valve opening and closing process. Such electric actuators are suitable for gate valve, globe valve.
3. Linear actuator (linear motion)
The motion of actuator output shaft is linear motion type, not in the form of rotation.