Solenoid valve is used to control the flow of the automation infrastructure components, belonging to the actuator; not limited to hydraulic, pneumatic. Hydraulic solenoid valve used to control the flow direction, the plant's machinery is generally controlled by the hydraulic steel, so it will use the solenoid valve.
The working principle of the solenoid valve, solenoid valve in a closed chamber, in different locations to open a hole, each hole is leading to a different pipeline, the middle valve chamber, both sides are two electromagnets, which face the magnet coil power will be attracted to the body which side, by controlling the movement of body to live or file a different row of oil leakage holes and into the hole is always open, hydraulic.