The electric device of the electric valve is one of the devices used to operate the valve and connected to the valve. The device is driven by electricity, and its movement process can be controlled by the size of the stroke, torque or shaft thrust. Since the working characteristics and utilization rate of the valve electric device depend on the type of valve, the working specifications of the device and the position of the valve on the pipeline or equipment. The basic principles of electric valve selection include the following points:
1. The operating torque is the most important parameter for selecting an electric actuator.
2. The main structure of the electric actuator. When selecting an electric actuator, it is necessary to clarify whether the electric actuator body needs to withstand thrust.
3. The number of turns of the electric actuator output shaft is related to the nominal diameter of the valve, the valve stem pitch, and the number of thread heads.
4. The valve stem diameter. The inner diameter of the hollow output shaft of the electric actuator must be larger than the outer diameter of the valve stem of the rising stem valve.
5. Appropriate output speed.
6. The installation methods are vertical installation and horizontal installation; the connection method is: thrust plate; usually the valve electric device uses a coupling that limits torque.
