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Normally closed solenoid valves open when the electrical coil is energized. They are ideal for water, air, light oil, noncorrosive and non-explosive liquids. DEMA offers a number of different closed solenoid valves including mini diaphragm, diaphragm, high pressure, pilot-piston, direct acting manifolds and direct acting for special purposes and corrosive liquids. 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 442P-443P

Instruction Sheet P442-P443

Instruction Sheet P462-P463

Instruction Sheet P404J

Instruction Sheet 463PS-464PS

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. 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.

 

Model No.
Pressure Differential
Body Material
Pipe Size N.P.T.
CV Flow Factor #
GPM @ 60 psi (cv # x √ psi)
min/psi
max/psi
442P
3
125
Brass
1/4
1
7.75
443P
3
125
Brass
3/8
1
7.75
P442
3
125
Celcon
1/4
1
7.75
P443
3
125
Celcon
3/8
1
7.75
PP442
3
125
PolyPro
1/4
1
7.75
PP443
3
125
PolyPro
3/8
1
7.75
P462
3
125
Celcon
1/4
1
7.75
P463
3
125
Celcon
3/8
1
7.75
P404J
3
150
GF Poly
1/2
2
15.49
463PS
3
150
Stainless Steel
3/8
2
15.49
464PS
3
150
Stainless Steel
1/2
2
15.49
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Brochure

Instruction Sheet 473P-476P

Instruction Sheet 476PS

Instruction Sheet 478PS

Diaphragm Solenoid Valves

Diaphragm solenoid valves are available for 3/8-3/4” 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.

 

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
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Brochure

Instruction Sheet 453P-458P

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.

 

Model No.
Pressure Differential
Body Material
Pipe Size N.P.T.
CV Flow Factor #
GPM @ 60 psi (cv # x √ psi)
min/psi
max/psi
453P*
10
1200
Brass
3/8
1.8
13.95
453S**
10
1200
Brass
3/8
1.80
13.94
454P*
10
1200
Brass
1/2
3.70
28.66
458P*
10
1200
Brass
1″
11.10
85.98
458PS**
10
1200
Brass
1″
11.10
325.44
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Brochure

Instruction Sheet 401P/411P

Instruction Sheet 491/492(M/S)

Instruction Sheet 424P.2

Direct Acting Valves

DEMA’s direct acting valves are available for 1/8-1/4” pipes, have orifices of 7/64, 1/8 or 3/32”, have brass or stainless steel bodies and Buna N, Viton or EPDM seals. With direct acting valves, the stem and plunger assembly opens the port of the valve directly and requires no minimum pressure to operate.

Model No.
Pressure Differential
Body Material
Pipe Size N.P.T.
CV Flow Factor #
GPM @ 60 psi (cv # x √ psi)
min/psi
max/psi
401P
0
150
Brass
1/4
.27
2.09
491S
0
150
Stainless Steel
1/8
.27
2.09
492S/M
0
150
Stainless Steel
1/4
.27
2.09
424P.2
0
125
Stainless Steel
1/4
.30
2.32
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Brochure

Instruction Sheet 412P-418P

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.

 

Model No.
Pressure Differential
Body Material
Pipe Size N.P.T.
CV Flow Factor #
GPM @ 60 psi (cv # x √ psi)
min/psi
max/psi
412P
1
150
Brass
3/8
1.2
9.30
A413P
3
150
Brass
3/8
2
15.50
A414P
3
150
Brass
1/2
3.10
24.03
A416P
3
150
Brass
3/4
5
38.75
A418P
3
150
Brass
1″
8
62
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Industrial Catalog

Instruction Sheet

Manifold Solenoid Valves

DEMA’s direct acting manifold valves are available in single and from 2-5 station manifolds, designed for 1/8-1/4” pipes, have 1/8” orifices , stainless steel bodies and Buna N, Viton or EPDM seals. Manifolds are made from solid brass or stainless steel block and have a common inlet port for chemical supply to all valves on both ends. With direct acting valves, the stem and plunger assembly opens the port of the valve directly and requires no minimum pressure to operate.

 

Model No.
Pressure Differential
Body Material
Pipe Size N.P.T.
CV Flow Factor #
GPM @ 60 psi (cv # x √ psi)
min/psi
max/psi
464M
0
150
Stainless Steel
1/2
2
15.9
492M
0
150
Brass
1/4
.27
2.09
492MSS
0
150
Stainless Steel
1/4
.27
2.09
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Industrial Catalog

Instruction Sheet

Special Purpose Valves

DEMA’s special purpose valves are “manifolding” diaphragm valves constructed of 30% glass filled polypropylene or glass filled nylon that can be joined together to form a manifold without bushings or connectors. The P404J is made from glass filled polypropylene, has an EPDM seal, is rated up to 125 psi, and has 1/2” pipe and 3/8” orifice size. The 466P is made from glass filled nylon, has a Viton seal, is rated up to 150 psi, and has 3/4” pipe and orifice size.

 

Model No.
Pressure Differential
Body Material
Pipe Size N.P.T.
CV Flow Factor #
GPM @ 60 psi (cv # x √ psi)
min/psi
max/psi
P404J
3
150
GF Poly
1/2
1
7.75
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Industrial Catalog

Instruction Sheet

Direct Acting Corrosive Liquid Solenoid Valves

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.

 

Model No.
Pressure Differential
Body Material
Pipe Size N.P.T.
CV Flow Factor #
GPM @ 60 psi (cv # x √ psi)
min/psi
max/psi
481P
Vacuum
PVC
1/8
.27
2.09
481.2
Vacuum
PVC
1/8
.27
2.09
481.2
Vacuum Dual Inlet
PVC
1/4
.27
2.09
482.2
Vacuum
PVC
1/4
.27
2.09
482.2
Vacuum Adjustable
PVC
1/4
.27
2.09
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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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