Goyen QW and QWJ series 2/2 normally closed solenoid valve

Valves are actuated by a solenoid pilot, using an internal bleed. The pressure within the valve is utilised to open and close the diaphragm. The QW series use a floating diaphragm to provide the seal for the main orifice. A small pressure drop across the main orifice is required to keep the disphragm in the open position. The QWJ series use a coupled diaphragm design which is mechanically held open via a direct linkage to the solenoid plunger. This enables the valve to operate with zero pressure differential across the main valve orifice.