How different kinds of valve valve electric device

As we all know, due to the working characteristic of valve electric device and work efficiency depends on the type of valve, the device specification and the position of the valve in the pipeline or equipment. Valve electric device, therefore, is to realize the programmable valve, control and remote control of drive equipment, its movement process can by travel, torque, or to control the size of the axial thrust.





valve electric device generally consists of the following parts:


special motor, characterized by overload capacity is strong, large starting torque, moment of inertia of small, short, intermittent work.


retarding mechanism, in order to reduce the output speed of the motor.


schedule control mechanism, and accurate control to adjust the opening and closing of the valve position.


torque limit institutions, to adjust the torque ( Or thrust) And make it less than predetermined value.


manual, electric switching mechanism, manual or electric interlock of the operation.


opening indicator, to show in the process of opening and closing of the valve position. Quarter-turn electric actuator ( Angle of 360 degrees Celsius) Suitable for butterfly valves, ball valves, plug valves, etc.


the electric actuator output shaft rotation is less than a week, that is less than 360 degrees, 90 degrees is usually so as to realize the control valve opening and closing process. This kind of electric actuator according to the different methods of installation interface is divided into direct type, base crank type two kinds.


) Direct type: refers to the electric actuator output shaft and the valve stem in the form of direct installation.


B） The base crank type: refers to the output shaft in the form of a crank connected with the valve stem. Multi-turn electric actuator ( Angle of 360 degrees Celsius) Applicable to gate valves, globe valves, etc. Electric actuator output shaft rotation is more than a week, that is greater than 360 degrees, usually need more than one ring valve opening and closing process control can be achieved. Straight trip ( Linear motion) Suitable for single seat regulator, two-seat regulator, etc. Electric actuator output shaft motion to linear motion type, not rotation.