Additional Terminology of solenoid valves

Here is a list of additional terms you'll need to be familiar with when deciding on the right valve. Being able to address these factors will help the specification process go smoothly.

2 Way is a two port valve that turns the flow on or off.

Normally closed (N.C.) means that when the solenoid valve is not energised the supply pressure port is closed off. 

In the case of 3 way valves the downstream port is open to the exhaust port.

Normally open (N.O.) means that when the solenoid valve is not energised the supply pressure port is open to the downstream port. 

In the case of 3 way valves the downstream port is closed to the exhaust port.

Direct acting are solenoid valves that are activated purely by the electromagnetic forces in the valve and do not rely on the fluid pressure to assist. 

Differential operated are solenoid valves that do rely on the fluid pressure to assist in activating the valve. This helps in developing valves with larger orifices, higher pressures and smaller coils.

Thread type

Mpa relates to pressure: 1 Mpa = 10 Bar =145psi