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Precise water control for car wash and industrial applications

Dema Engineering Normally Closed Solenoid Valves are generally used for water control up to 150 PSI. Used on many chemical systems such as Car Wash Tunnel applications. A normally closed solenoid valve will open when a current goes to the coil. When energized the plunger is pulled up to the top plug opening the small pilot port in the center of the diaphragm plate. This releases the water pressure on the top of the diaphragm allowing incoming pressure to lift it off this large center port.

When de-energized, the solenoid plunger is pushed from the top plug by the kick off spring and closes the pilot port. Fluid passes through the diaphragm bleed hole until pressure is equalized on both sides of the diaphragm to shut off the large port. All Normally Closed Diaphragm Valves have stainless steel seats.

 
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