Hydraulic solenoid valves are frequently similar to pneumatic solenoid valves except they control the stream of hydraulic fluid (oil). Hydraulic devices use solenoids to control the movement of oil. Solenoids are in everyday domestic items such as washing devices to control the movement and volume of water to the equipment. https://300-psi03580.blog-eye.com/15652784/5-easy-facts-about-pneumatic-actuator-solenoid-valve-described