Normally Open Diaphragm Solenoid Valves

Diaphragm solenoid valves are available for 3/8, ½ and 3/4” pipes, have orifices from 9/16-3/4” are constructed of brass, have Buna N seals and stainless steel seats. When not 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.

     
 

O473P
O474P
O476P

Model No.
Pressure Differential
Body Material
Pipe Size N.P.T.
CV Flow Factor #
GPM @ 60 psi (cv # x √ psi)
min/psi
max/psi
O473P
1
150
Brass
3/8
5
38.73
O474P
1
150
Brass
1/2
5
38.73
O476P
1
150
Brass
3/4
5
38.75