Hydraulic solenoid valves are usually just like pneumatic solenoid valves besides that they control the movement of hydraulic fluid (oil). Hydraulic machines use solenoids to control the flow of oil. These pieces directly contact the process gasoline. They have to have sufficient corrosion and erosion resistance. Air and also other https://control-valve04603.answerblogs.com/15741892/pressure-gauge-4-an-overview