Festo VZWF Brass Solenoid Valves

Festo VZWF Brass Solenoid Valves 

Datasheet

Normally closed solenoid valve with diaphragm and forced lifting. When the solenoid is energised, the differential pressure from the secondary side of the diaphragm is reduced via an internal pilot hole. The effective differential pressure lifts the diaphragm away from the valve seat. If there is no differential pressure, the diaphragm is lifted directly by the solenoid. The valve opens and closes without a differential pressure between the inlet and outlet.