Solenoid valve has a closed cavity, in different position open hole, each hole to different tubing, the cavity in the middle of the valve, two sides are two electromagnet, which magnet coil electric valve body will be attracted to which side, by controlling the movement of the valve body to live or leak different oil hole, and oil hole is often open, hydraulic oil will enter different pipes, and then through the oil pressure to push oil just piston, piston and drive piston rod, piston rod drive mechanical device. This controls the mechanical movement by controlling the electric current of the electromagnet.

Working principle of the solenoid valve: it is an automatic base element used to control the fluid, which belongs to the actuator; not limited to hydraulic, pneumatic. Used to control the hydraulic flow direction, factory mechanical device are generally controlled by the hydraulic cylinder, so will use its working principle, has a closed cavity, in different positions, each hole to different pipe, the cavity is the valve, two sides are two electromagnet, which side of the magnet coil the valve body will be attracted to which side, through the control of the valve body to gear or leak different oil hole, and the oil hole is often open, hydraulic oil will enter different oil pipe, and then through the oil pressure to push the oil piston, piston, piston rod, piston rod drive mechanical device. This controls the mechanical movement by controlling the electric current of the electromagnet.