The solenoid valve has a closed cavity, in different locations open through holes, each hole to connect a different tubing, the middle of the cavity is the piston, both sides are two electromagnets, which side of the magnet coil valve body will be attracted to where Side, by controlling the movement of the valve body to open or close the different drain holes, and the oil inlet is normally open, the hydraulic oil will enter a different drain pipe, and then through the oil pressure to promote the piston cylinder Driving the piston rod, the piston rod drive mechanism. This controls the mechanical movement by controlling the current on and off of the electromagnet.
