DEMA’s mini diaphragm solenoid valves are ideal for weep systems and many are NSF standard 61, C-2 approved. They are available for 1/4, 3/8 and 1/2” pipes, have orifices from 1/4 or 3/8” and are constructed of br, Celcon, polropylene or stainless steel. When not energized, the plunger is pulled to the plug, thus opening the all “pilot port” in the center of the diaphragm plate. This releases the pressure on of the diaphragm allowing incoming pressure to lift it off the large center port. When de-energized, the solenoid plunger is pushed from the plug by the kick-off spring and closes the pilot port. Fluid pes through the diaphragm bleed hole until pressure is equalized on both sides of the diaphragm to shut off the large port.
O442/ | OP442/3 | OPP442/3 | O463/4PS |
Model No. | Pressure Differential | Body Material | Pipe Size N.P.T. | CV Flow Factor # | GPM @ 60 psi (cv # x √ psi) | |
min/psi | max/psi | |||||
O442P | 3 | 125 | Br | 1/4 | 1 | 7.75 |
O44 | 3 | 125 | Br | 3/8 | 1 | 7.75 |
OP442 | 3 | 125 | Celcon | 1/4 | 1 | 7.75 |
OP443 | 3 | 125 | Celcon | 3/8 | 1 | 7.75 |
OPP442 | 3 | 125 | Polro | 1/4 | 1 | 7.75 |
OPP443 | 3 | 125 | Polro | 3/8 | 1 | 7.75 |
O46S | 3 | 150 | Stainless Steel | 3/8 | 2 | 15.49 |
O464PS | 3 | 150 | Stainless Steel | 1/2 | 2 | 15.49 |