Differences in 2-way, 3-way, and 4-way solenoid valves
What Is a Solenoid Valve? A solenoid valve is an electrically controlled valve that uses a magnetic coil to open or close internal ports. The term “way” refers to the number of ports the valve has, which determines how fluid or air is routed through the system. 2‑Way Solenoid Valves: Basic Flow Control