What is a 3-Way Solenoid Valve and How does it work?
Three – way Solenoid valves have three pipe connections or ports and two Orifices. One is always open, Allowing for two paths of flow depending on the energized state of the solenoid valves. This allows the flow or pressure to a tool to be applied of stopped when the valve is energized （De-energized, and the flow or pressure to move to a different destination when the valve is de-energized (energized)
There are three common types of 3-way Solenoid valves
3-way Normally Closed
3-way Normally Open
3-way Directional Control
P1 as air inlet, when the coil is not energized, the body orifice seal of the plunger seals the body orifice, at this time P2 and P3 are not ventilated; When the coil is energized the plunger is raised sealing off the stop orifice and opening up the body orifice allowing flow through the body of the valve from the body orifice port and out the stop port.P2 vents, P3 does not vent
Normally Open
P3 As Air inlet, when the coil is not energized, the body orifice seal of the plunger seals the body orifice, at this time, P2 vents, P3 does not vent ;
When the coil is energized the plunger is down, sealing off the body orifice and opening up the stop orifice allowing flow through the valve from the cavity port and out the stop port. P1 and P2 does not vent.
Directional Control
P2 As Air inlet, when the coil is not energized, the body orifice seal of the plunger seals the body orifice, at this time, P3 vents, P1 does not vent ; When the coil is energized the plunger is down, sealing off the body orifice and opening up the stop orifice allowing flow through the valve from the cavity port and out the stop port. P1 vents, P3 does not vent.
