Solenoid Valve selection according to function.
Failsafe Closed requires power to Open - Failsafe Open requires power to Close.
3/2 Failsafe Closed - inlet closed outlet open to exhaust, power on inlet opens to outlet and exhaust closes.
3/2 Failsafe Open - inlet open to outlet & exhaust is closed, power on - inlet closed, outlet opens to exhaust.
3/2 Universal - flow in any direction can be used as failsafe closed, open or for diverting flow.
5/2 way single coil - Example: Power to coil Cylinder fully extends - power off cylinder fully retracts (or visa versa)
5/2 way double coil - Example: Power to coil 1 Cylinder fully extends, power to coil 2 cylinder fully retracts, power off cylinder stays put.
5/3 way double coil - Example: Power to coil 1 Cylinder extends, power to coil 2 cylinder retracts, power off cylinder stays put even in mid position.
Latching - power pulse to open & stays open, reverse polarity power pulse to close and stays closed.