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Normally open solenoid valve closes when the coil is energized. They are ideal for water, air, light oil, noncorrosive and non-explosive liquids. DEMA offers mini diaphragm, diaphragm and high pressure normally open solenoid valves. DEMA solenoid valves are constructed to insure long, trouble free life. They employ proven design features for reliable performance on all applications.

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Brochure

Instruction Sheet

Normally Open Diaphragm Solenoid Valves

Diaphragm solenoid valves are available for 3/8, 1/2 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.

 

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
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Brochure

Instruction Sheet

Normally Open High Pressure Valves

DEMA’s offers 2 high pressure valves, the 0453P and O453S. Both are designed for pressures from 10 psi up to 1000 psi, have brass bodies, Teflon seals, designed for 3/8” pipes and have 11/32” orifices. The only difference is the 0453S features a stainless steel piston. The high pressure valves 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.

 

Model No.
Pressure Differential
Body Material
Pipe Size N.P.T.
CV Flow Factor #
GPM @ 60 psi (cv # x √ psi)
min/psi
max/psi
O453P*
10
1000
Brass
3/8
1.8
13.95
O453S**
10
1000
Brass
3/8
1.8
13.95
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Brochure

Normally Open Mini Diaphragm Solenoid Valves

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 brass, Celcon, polypropylene or stainless steel. 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.

 

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
Brass
1/4
1
7.75
O443P
3
125
Brass
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
PolyPro
1/4
1
7.75
OPP443
3
125
PolyPro
3/8
1
7.75
O463PS
3
150
Stainless Steel
3/8
2
15.49
O464PS
3
150
Stainless Steel
1/2
2
15.49
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Coil Options & Electrical Specifications

For ease of identification, coils are manufactured with the following Color Coding

Voltage
Wire Leads
Molded Spade (body)
12VDC/24 VDC
Black
Black
24 VAC 60 Hz
Orange
Blue
120 VAC 60 Hz
Blue
Green
208-240 VAC 60 Hz
Red
Red
 

Leads on valves with a conduit boss and flying lead coils are 18” long while coil leads on valves with a junction box are 6” in length.

Coil to Valve Usage (Most available in AC or DC)

Coil
Valve Used On
Coil No. 1
401P, 473P, 474P, 476P, O473P, O474P, O476P, 481P, 482.2
Coil No. 2
411P, 412P, A413P, A414P, A416P, A418P, 453P, 453PS, 454P, 458P, 458PS, O453P, O453PS
Coil No. 5
442P, 443P, P442, P443, PP442, PP443, P462, P463, P463PS, 464PS, 463PSJ, 464PSJ, P404J
Coil No. 7
491M, 492M, 491S, 492S, 492SM, 476PS, 478PS
 

Electrical Specification For AC Coils

Coil
Volts
Watts
Amperes Inrush 50/60 Hz
Amperes Holding 50/60 Hz
Coil No. 1
24
10
1.8/1.5
1.0/.75
120
10
.38/.33
.21/.15
208
10
.16/.14
.12/.09
240
10
.19/.16
.10/.07
Coil No. 2
24
15
3.7/.30
1.6/1.2
120
15
.73/.60
.33/.24
208
15
.41/.35
.19/.14
240
15
.36/.30
.16/.12
Coil No. 5
24
10
na/.67
na/.48
120
10
na/.15
na/.102
240
10
na/.075
na/.058
Coil No. 7
24
10
na/.67
na/.48
120
10
na/.15
na/.102
 

Electrical Specification For DC Coils

Coil No.
Volts
Watts
Amps
Coil No. 1
12
15
1.25
24
15
.625
Coil No. 2
12
18
1.5
24
18
.75
Coil No. 5
12
10
.83
24
10
.42
Coil No. 7
24
13
.54
 

Valve Repair Kits

Model No. Kit No. Description (Included Parts in Kit)
401P
41-24
O-Ring, Plunger Spring, Plunger, Valve Seat
412P
41-26
O-Ring, Closing Spring, Plunger Spring, Plunger, Piston Ring, Backup Spring, Piston Assembly
A413P
41-27
O-Ring, Closing Spring, Plunger Spring, Plunger, Piston Ring, Backup Spring, Piston Assembly
A414P
41-28
O-Ring, Closing Spring, Plunger Spring, Plunger, Piston Ring, Backup Spring, Piston Assembly
A416P
41-29
O-Ring, Closing Spring, Plunger Spring, Plunger, Piston Ring, Backup Spring, Piston Assembly
418P
41-30
O-Ring, Closing Spring, Plunger Spring, Plunger, Piston Ring, Backup Spring, Piston Assembly
442P/443P
61-78
Closing Spring, Plunger, Diaphragm
P442/P443
61-78
Closing Spring, Plunger, Diaphragm
P462/P463
61-78
Closing Spring, Plunger, and Diaphram
463PS/464PS
61-78
Closing Spring, Plunger, Diaphragm
OP462/OP463
41-44-1
Diaphragm, Enclosing Assembly
OP442/OP443
41-44-1
Diaphragm, Enclosing Assembly
OPP442/OPP443
41-44-1
Diaphragm, Enclosing Assembly
O463PS/O464PS
41-44-1
Diaphragm, Enclosing Assembly
453P/453S
41-31
O-Ring, Closing Spring, Plunger Spring, Plunger, Piston Ring, Backup Spring, Piston Assembly
454P
41-31
O-Ring, Closing Spring, Plunger Spring, Plunger, Piston Ring, Backup Spring, Piston Assembly
458P
41-33
O-Ring, Plunger Spring, Plunger, Piston Ring, Backup Spring, Piston Assembly
458PS
41-33-2
O-Ring, Closing Spring, Plunger Spring, Plunger, Piston Ring, Backup Spring, Piston Assembly
O453P/O453S
41-58
O-Ring, Closing Spring, Piston Ring, Backup Spring, Piston Assembly
473P/474P
41-47
O-Ring, Plunger Spring, Plunger, Diaphragm
O473P/O474P
41-50
O-Ring, Closing Spring, Diaphragm, Valve Operator
O476P
41-50-1
O-Ring, Closing Spring, Diaphragm, Valve Operator
476P
41-49
O-Ring, Plunger Spring, Plunger, Diaphragm
492M
*49-1-8 (1/8″ Orfice)
O-Ring, Plunger Spring, Plunger, Valve Seat, Piston Assembly
492M
*49-1-6 (3/32 Orfice)
O-Ring, Plunger Spring, Plunger, Valve Seat, Piston Assembly

*Note: Add Suffix (B) Buna, (E) EPDM, (V) Viton i.e. 49-1-8V

Solénoides, injecteurs et lavage à pression

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