The action force distance of the electric valve is larger than that of the ordinary valve. The opening and closing action speed of the electric valve can be adjusted. The structure is simple and easy to maintain. It can be used to control the flow of air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. There is a handle on the electric actuator of the valve. When manual operation is needed, pull the handle first, and then turn the hand wheel. When the switch is pressed, the actuator will automatically switch to the electric mode. In the process of action, because of the buffer characteristics of the gas itself, it is not easy to get stuck and damaged, but there must be a gas source, and its control system is more complex than the electric valve. Electric valve in the pipeline should generally be installed horizontally.

Daily maintenance of electric valve

1. The electric valve shall be stored in a dry and ventilated room, and both ends of the passage shall be blocked.

2. The electric valve stored for a long time should be inspected regularly to remove the dirt, and the processing surface should be coated with antirust oil.

3. After installation, regular inspection shall be carried out. The main inspection items are as follows:

(1) Wear condition of sealing surface.

(2) Trapezoidal thread wear of stem and stem nut.

(3) Whether the packing is out of date and invalid, and if it is damaged, it should be replaced in time.

(4) After maintenance and assembly of electric valve, sealing performance test shall be conducted.