DEMA 1/2 Inch Solenoid Valve 120 Volt Normally Closed High Pressure
Diaphragm solenoid valves are available for 3/8-3/4” pipes, have orifices from 9/16-3/4” are constructed of brass or stainless steel and have stainless steel seats. When energized, the plunger is pulled to the top plug, thus opening the small “pilot port” in the center of the diaphragm plate. This releases the pressure on top of the diaphragm allowing incoming pressure to lift it off the 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. When the solenoid coil is energized, a plunger is pulled away from the pilot port in the center of the diaphragm thus relieving the pressure on top of the diaphragm and allowing input water pressure from underneath to push the diaphragm up and open the outlet port. When the coil is de-energized a kickoff spring pushes the plunger toward the pilot hole in the diaphragm which then blocks any water above the diaphragm from flowing out. The water pressure builds up through a hole in the outer rim of the
diaphragm until it pushes the diaphragm down firmly over the central outlet port and shuts off the water flow.
~1/2" FPT pipe connections
~120-VAC coil with junction box and wire leads
~Orifice size: .563"
~Flow Rate @ 60 PSI: 30.98 GPM
~Max Fluid Temp: 200°F
~Pressure Differential: 1 to 150 PSI
~Brass body and stainless steel seats
~Diaphragm activated valve
~Dema valves may be installed in either horizontal or vertical lines and in any position other than with the coil lower than the body.
Mfr Catalog No. 474P-120