Fluid solenoid valve is also called solenoid valve. It is an industrial equipment controlled by electromagnetism. It is a basic component of automation used to control fluids. It is an actuator and is not limited to hydraulic and pneumatic. Used in industrial control systems to adjust the direction, flow, speed and other parameters of the medium. Solenoid valves can cooperate with different circuits to achieve expected control, and the control accuracy and flexibility can be guaranteed. There is a closed cavity in the solenoid valve, with through holes at different positions. Each hole is connected to a different oil pipe. There is a piston in the middle of the cavity, and two electromagnets on both sides. The valve body will be attracted to whichever side of the magnet coil is energized. On the other hand, 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 the different oil drain pipes, and then push the piston of the oil cylinder through the oil pressure, and the piston will It drives the piston rod, and the piston rod drives the mechanical device. In this way, the mechanical movement is controlled by controlling the current on and off of the electromagnet.