Diaphragm Valves

NORMALLY CLOSED

APPLICATION: Water, air, light oil, noncorrosive and nonexplosive liquids.

Recommended for applications that have unfiltered fluid.

OPERATION: 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.

All diaphragm valves have stainless steel seats

 MOPD: Max 150 PSI Min 1 PSI

BENEFITS: Forgiving with contaminents in water

SEAL: BUNA Standard, Teflon available on most models

Valves rated 200F/93C fluid, 120F/49C ambient 

 • Suitable for up to 10 psi steam, 240F/115C with Teflon Diaphragm, add suffix (T) for Teflon Diaphragm.

   Model No.        Pipe Size      Orifice             CV 

       473P           3/8 N.P.T.      9/16                3.5 

       474P           1/2 N.P.T.      9/16                4.0 

      476P           3/4 N.P.T.       3/4                  5.0 

      476PS          3/4 N.P.T.      3/4                  5.0 

      478PS          1” N.P.T         1”                13.0