Electric valve device is programmed, control valve and remote control of the indispensable equipment, its movement process can by travel, torque, or to control the size of the axial thrust. 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, therefore, the correct selection of valve electric device, to prevent overload phenomenon (work torque is higher than the control torque) is very important. Usually, the basis of correct selection of the valve electric actuator is as follows: operating torque: operating torque is the most important parameters, selection of valve electric actuator valve electric actuator output torque should be operating maximum moment of 1.2 ~ 1.5 times.
