Solenoid valve has a closed chamber, open a through hole in different positions, each hole is connected to different tubing, the middle of the chamber is a piston, two sides are two electromagnets, which side of the magnet coil energized valve body will be attracted to which side, by controlling the movement of the valve body to open or close different oil holes, and the oil inlet hole is often open, hydraulic oil will enter a different oil discharge pipe, Then the pressure of the oil pushes the piston of the cylinder, which in turn drives the piston rod, which drives the mechanism. In this way the mechanical motion is controlled by controlling the current break of the electromagnet.
