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Normally Closed Diaphragm Solenoid Valves

Normally Closed Diaphragm Solenoid Valves
Normally Closed Diaphragm Solenoid Valves
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.

Parts and Accessories
Coil Options

Normally Closed Direct Acting Corrosive Liquid Solenoid Valves

Normally Closed Special Purpose Solenoid Valve
Normally Closed Special Purpose Solenoid Valve

DEMA’s direct acting valves for corrosive liquids are constructed from PVC, EPDM seal, have a 5/32” orifice size and a CV flow factor of .27. DEMA offers 3 different models. The 481P direct acting diaphragm valve designed for vacuum lines with corrosive liquids. It is designed for 1/8” pipe but can also be injector mounted by using Kit 24-50. The 481-2 is designed to be injector mounted and has dual inlets. It can be mounted on all DEMA B and C series injectors. The 482-2 is also a direct acting diaphragm used on vacuum lines with corrosive liquids but is adjustable and designed for 1/4” pipe.

Parts and Accessories
Coil Options

Normally Closed High Pressure Valves

Normally Closed High Pressure Valves
Normally Closed High Pressure Valves
Normally Closed High Pressure Valves

DEMA’s high pressure valves are designed for pressures from 10 psi up to 1200 psi, are available for 3/8-1” pipes, have orifices from 11/32-15/16” and are intended for use with water only. They operate the same as a pilot operated valve except the pilot port is in a separate chamber from the piston. This allows the plunger to operate closer to the top plug with more force and consequently higher opening pressure.

Parts and Accessories
Coil Options

Normally Closed Manifold Solenoid Valves

Normally Closed Manifold Solenoid Valves
Normally Closed Manifold Solenoid Valves

DEMA has multiple configurations of manifold valves to choose from.  The 464M is a mini diaphragm manifold valve from 3-5 stations designed for ½” inlets and 3/8” outlets in Stainless steel bodies with Viton or EPDM diaphragm seals. The 492 direct acting manifold valves are only ¼” NPT (not 1/8”) with 1/8” orifices. There are metering and non-metering versions of the 492.

Parts and Accessories
Coil Options

Normally Closed Mini Diaphragm Solenoid Valves

Normally Closed Mini Diaphragm Solenoid Valves
Normally Closed Mini Diaphragm Solenoid Valves
Normally Closed Mini Diaphragm Solenoid Valves
Normally Closed Mini Diaphragm Solenoid Valves
Normally Closed Mini Diaphragm Solenoid Valves

Mini diaphragm solenoid valves are available for 1/4-1/2” pipes, have orifices from 1/4-3/8”, and are constructed of brass, Celcon, polypropylene, or stainless steel. Some carry NSF and UL listings to fit a wide variety of applications. 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.

Parts and Accessories
Coil Options

Normally Closed Pilot-Piston Solenoid Valves

Normally Closed Pilot-Piston Solenoid Valves
Normally Closed Pilot-Piston Solenoid Valves
Normally Closed Pilot-Piston Solenoid Valves

DEMA’s pilot-piston valves are available for 3/8-1” pipes, have multiple orifice sizes from 9/32 to 3/4”, have brass bodies, stainless steel seats and Teflon seals. With pilot-piston valves, the stem and plunger assembly opens the port. This releases the pressure on top of the piston, which moves upward and opens the main valve port.

Parts and Accessories
Coil Options

Normally Closed Special Purpose Solenoid Valve

Normally Closed Special Purpose Solenoid Valve
Normally Closed Special Purpose Solenoid Valve
Normally Closed Special Purpose Solenoid Valve

DEMA’s special purpose valves are “manifolding” diaphragm valves constructed of 30% glass filled nylon or PVC that can be joined to form a manifold without bushings or connectors. Applications for 466P, 481P, and 482.2 include: Water, air, light oil, noncorrosive and non-explosive liquids.  EPDM seal is standard, Viton is available on request.

Parts and Accessories
Coil Options
Features & Benefits
Models
Accessories
Resources

Applications for 466P, 481P, and 482.2 include: Water, air, light oil, noncorrosive and non-explosive liquids.

Model 466P

  • Glass-filled nylon construction
  • EPDM seal
  • 3-150 psi
  • 3/4” pipe and 3/4” orifice size.
  • CV flow factor 10

Model 481P & 482.2

  • PVC construction
  • EPDM seal
  • 1/8” pipe (481P); 1/4″ pipe (482.2) and 5/32” orifice size.
  • CV flow factor 2.09
Model No. Pressure Differential Body Material Pipe Size N.P.T CV Flow Factor # GPM @ 60 psi
min/psi max/psi
466P 3 150 GF Nylon 3/4″ 10 77.50
481P Vacuum – PVC 1/8″ 0.27 2.09
482.2 Vacuum – PVC 1/4″ 0.27 2.09

* 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

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.
Product
Normally Closed Special Purpose Solenoid Valve
Model No.
All
Resource No. / Description
I748
DEMA Corporate Headquarters

DEMA Engineering Company
10020 Big Bend Road
Saint Louis, MO 63122 USA

 

Phone: +1 314 966 3533
Fax: +1 314 965 8319
sales@www.demaeng.com

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