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Normally Closed Diaphragm Solenoid Valves

Diaphragm solenoid valves are available for 3/8-1” 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.

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  • Application: water, air, light oil, noncorrosive and non-explosive liquids.
  • Recommended for applications with unfiltered fluid.
  • Brass or stainless steel construction and stainless steel seats
  • Buna N or Teflon diaphragms
  • Rated for 200°F/93°C fluid and 120°F/49°C ambient.
  • Suitable for up to 10 psi steam, 240°F/115°C with Teflon Diaphragm
  • CV flow factor varies by model (3.5-12.0)
Model No. Pressure Differential Body Material Pipe Size N.P.T CV Flow Factor # GPM @ 60 psi (cv # x √ psi)
min/psi max/psi
473P 1 150 Brass 3/8″ 3.5 27.13
474P 1 150 Brass 1/2″ 4 30
476P 1 150 Brass 3/4″ 5 38.75
476PS 1 150 Stainless Steel 3/4″ 5 38.75
478PS 1 150 Stainless Steel 1″ 13 100.7

* Shown above are the most common configurations.  Many additional configurations are readily available, contact us at [email protected] or speak with your DEMA sales representative for more information.

Coil Options

Coil Options

    • DEMA solenoid valves are available in many AC and DC voltage ratings and wiring options include a junction box, spade, conduit and din with voltage options of 12VDC, 24VDC, and 24, 120, 208, and 240VAC 50/60 cycle on most models.
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Normally Closed Solenoid Valves
Model No.
All
Resource No. / Description
Product
Normally Closed Diaphragm Solenoid Valves
Model No.
473P-476P
Resource No. / Description
Product
Normally Closed Diaphragm Solenoid Valves
Model No.
476PS
Resource No. / Description
Product
Normally Closed Diaphragm Solenoid Valves
Model No.
478PS
Resource No. / Description
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