How a solenoid valve works?

How a solenoid valve works? What is the working principle of the solenoid valve? How does the solenoid valve work? China solenoid valve manufacturerTJL indusry group summarizes the working principle of the solenoid valve. details as follows:

China solenoid valve working principle

There are closed chambers in the solenoid valve. There are through holes in different positions. Each hole is connected with different oil pipes. The middle of the cavity is a piston. On both sides are two electromagnets. Which side of the magnet coil is energized, the valve body will be attracted to Which side, by controlling the movement of the valve body to open or close different oil drain holes, and the oil inlet hole is normally open, the hydraulic oil will enter different oil drain pipes, and then the oil pressure will push the piston of the oil cylinder, the piston The piston rod is driven again, and the piston rod drives the mechanical device. This controls the mechanical movement by controlling the current switch of the electromagnet.