White Rodgers 25M01A 100 25M Gas Dryer Valves Brochure R 4080

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WHITE-RODGERS

25M SERIES GAS CONTROLS
PRODUCT INFORMATION
The 25M series gas control is a compact,
multifunctional valve, with a direct-acting
regulator ideal for use in pilot valve
applications, thru-the wall heaters, RV
heaters, gas clothes dryers, hearth products, radiant heat systems, water heaters,
cooking applications, agricultural heaters/
dryers, or other high-efficiency equipment.
The 25M valve, provided with a straightin inlet, has various outlet configurations
that, when coupled with the various pipe
sizes available, make for easy adaptation
to a given application.

Optional features, such as the inlet
pressure tap, increase the flexibility in
adapting this valve.
Available configurations include:
❚ Single Solenoid
(for pilot valve applications)
❚ Dual Solenoid, Valves in Series
(for applications requiring redundancy)
❚ Dual Solenoid, Valves Independent
(for dual burner applications)
❚ Split-Coil (for use with Hot Surface
Ignition systems)
❚ Two-Stage (for applications requiring
both high-fire and low-fire settings)

general specifications
Standard Features
25M
Appliance

25M
Manifold

X
X

X

X
X
X
X
X
X
X
X

X
X
X
X
X
X
X
X
X
X

Compact Size (3-13/32" x 2-1/2" - 2-19/32")
Split Coil
Single Solenoid
Dual Solenoid
Inlet Screen (protected from pipe damage)
Outlet Screen (protected from pipe damage)
Field Adjustable Regulator
Replaceable Operating coils without interrupting gas flow
Outlet Pressure Tap
Ambient Temperature Rating: 32˚ to 155˚F
Ambient Temperature Rating: 32˚ to 175˚F
Straight Through Outlet (offset)
.110 x .010 Male Terminals
3/16" Male Tab Type Terminals

Optional Features
25M
Appliance
X
X

25M
Manifold

X
X
X
X
X
X
X
X
X
X
X
X
X

Orifice Holder Outlet
Right/Left Angle Outlets
Dual Outlets (Right-Angle-Left AND Right-Angle-Right or Straight Through
Inverted Flare
British Threads (Rp)
Inlet Pressure Tap
Natural to LP Regulator Selector (convertible)
European Quiet-Type Solenoids
Encapsulated Leads
Ground Terminal
Tamper Evident Regulator Seal
Low Ambient Temperature Rating (-40˚ to 175˚F)
High Capacity Model (60 KBTU Natural Gas)
Two-Stage Operation (Right-Angle-Left or Right-Angle-Right Only)

Regulator Adjustment Range
Natural Gas:

Range of Regulations
Natural Gas:

2.8" to 4.0" W.C.
3.5" to 5.4" W.C.

LP Gas: 8.5" to 11.4" W.C.
9.0" to 12.0" W.C.

5,000 to 55,000 BTU/hr
5,000 to 65,000 BTU/hr —
Dual Solenoid Independent

LP Gas: 8,000 to 89,000 BTU/hr
8,000 to 104,000 BTU/hr —
Dual Solenoid Independent

Conversion Kits
Part Number
From Natural Gas to Regulated LP:
From LP to Natural Gas:
From Natural gas to LP:

2

F73-1493
F73-1561
F69-2257

Regulates between 9.0" to 12.0" W.C.
Regulates between 2.8" to 4.0" W.C.
Blocks open the Regulator (Blocking Pin)

25M GAS CONTROL
PRODUCT INFORMATION
R-4080

general specifications
Current Requirements

OPERATOR(S) REQUIREMENT (AMPS)
Voltage Frequency

Single Coil

Dual Coil, Parallel (total draw)

12
24
24

DC
DC
50 Hz

.240
.120
.210

.480
.240
.420

24
120
120

60 Hz
50 Hz
60 Hz

.175
.035
.030

.350
.070
.060

240
240

50 Hz
60 Hz

.030
.025

.060
.050

SPLIT-COIL VERSIONS
Model #

Rated Volts

Hertz

25M01A

120
120
120
120

25M01B

SPLIT-COIL
25M01A
1" P.D. Capacity
40K
2" P.D. Capacity
60K
Range of Regulation
5 to 55K
Ambient Temperature
32˚ to 155˚ F
Rating
Outlet Pressure
2.8" to 4.0"
Adjustment Range

Operating Mode

Comments

60
60
50

Start
Running
Start

Glo-Bar On, Sensor Closed
Glo-Bar Off, Sensor Open
Glo-Bar On, Sensor Closed

50

Running

Glo-Bar Off, Sensor Open

DUAL SOLENOID
REDUNDANT

DUAL SOLENOID
INDEPENDENT

SINGLE SOLENOID

HIGH
CAPACITY

25M02

25M12

25M03

25M13

25M04

25M14

25M72

40K
60K
5 to 55K

40K
60K
5 to 55K

30K/side*
35K/side+
5 to 65K

30K/side*
35K/side+
5 to 65K

48K
70K
5 to 65K

48K
70K
5 to 65K

52K
73K
25 to 85K

32˚ to 175˚ F -40˚ to 175˚ F 32˚ to 175˚ F -40˚ to 175˚ F 32˚ to 175˚ F -40˚ to 175˚ F -40˚ to 175˚ F
2.8" to 4.0"

2.8" to 4.0"

3.5" to 5.4"

3.5" to 5.4"

2.8" to 4.0"

2.8" to 4.0"

2.8" to 4.0"

* 60K with both solenoids energized
+ 70K with both solenoids energized

Maximum Pressure: 1/2 PSI

Agency Approvals: CSA Int’l all models

Pipe Sizes
Inlet:

3/8" or 1/4" NPT or British Threads (Rp)
Straight In

Outlet:

3/8", 1/4", 1/8" NPT or British Threads (Rp)
or Orifice Holder
Right Angle Right (RAR), Right Angle Left (RAL), Offset Straight Through,
or Right Angle Right and Left (Dual Outlet)

25M GAS CONTROL
PRODUCT INFORMATION
R-4080

3

general specifications
Regulator Operation
The 25M series gas valve utilizes a direct acting regulator construction to maintain proper outlet gas
pressure for fluctuating inlet pressures. (Refer to Fig. 1)
1) Calibration
The regulator is adjusted at the factory to give
the outlet pressure to an orifice as required by
the customer (This is referred to as the set
point). The outlet pressure (B) and the orifice
are selected by the customer to give the desired
flow rate of gas necesary for his application.
This adjustment is made at an inlet pressure (A)
of 7.0" W.C. for natural gas and 14.0" for L.P. gas.
2) Flucuating Inlet Pressure (A)
When the inlet pressure (A) increases, the outlet
pressure (B) starts to increase, but the increasing
force created on the diaphragm causes the stem to
move closer to the seat thereby throttling the flow
and reducing the pressure onto the diaphragm. As
this pressure decreases the stem moves away from
the seat allowing more flow and higher outlet
pressure (B). The outlet pressure, therefore, modulates (high frequency and small amplitude) with
respect to the set point. This is normal operation
for direct acting types of regulators.
Figure 1

Outline and Mounting Dimensions
Single Stage Model

4

25M GAS CONTROL
PRODUCT INFORMATION
R-4080

general specifications
Outline and Mounting Dimensions (cont.)
Two Stage Model
MAIN COIL, 12 V.D.C., 3/16 QUICK
DISCONNECT TERMINALS (LABELED
"1" AND "2")

2 MOUNTING HOLES CORED
FOR 8-32 SELF-TAPPING SCREWS
7/16 DEEP.

L

C OF OUTLET
3.468

1.406
.546

2.390

1

18° TYP.

.781

DO NOT

GRIP

2.947

4

REDUNDANT COIL, 12 V.D.C., 3/16
QUICK DISCONNECT TERMINALS
(LABELED "3" AND "4")

6

CONTROL LABEL THIS SURFACE

DO NOT

VENT / LEAK LIMITER ORIFICE

5

4.217

GRIP HERE

OF INLET

2 HERE 3

L

C

1.531

2ND STAGE COIL, 12 V.D.C., 3/16
QUICK DISCONNECT TERMINALS
(LABELED "5" AND "6")

Typical Wiring Diagrams

TYPICAL WIRING DIAGRAM FOR MODEL 25M APPLIANCE VALVE

TYPICAL WIRING DIAGRAM FOR MODEL 25M MANIFOLD VALVE

Cross-Sectional Views

Figure 2 - CROSS-SECTIONAL VIEW OF 25M APPLIANCE VALVE

25M GAS CONTROL
PRODUCT INFORMATION
R-4080

5

general specifications
Cross-Sectional Views (cont.)

Figure 2 - CROSS-SECTIONAL VIEW OF 25M MANIFOLD VALVE

25M Performance Curves
Natural Gas (1000 BTU/FT3, .64 SP. GR.)
2.0

4.5
Set Point: Q = 23.4 KBTU/hr
Pout = 3.5" W.C.

Outlet Pressure ("W.C.)

Pressure Drop ("W.C.)

1.8
1.6
1.4
1.2
1.0
.8
.6
.4
.2
0

4.0

X

3.5
3.0
2.5
2.0

0

20

30

40
50
60
70
Capacity (KBTU/hr)

80

90

100

0

10

20

30
40
50
60
Capacity (KBTU/hr)

70

90

100

80

90

100

L.P. Gas (2500 BTU/FT3, 1.53 SP. GR.)
11.5

Outlet Pressure ("W.C.)

Pressure Drop ("W.C.)

2.0
1.8
1.6
1.4
1.2
1.0
.8
.6
.4
.2
0

10.5
Set Point: Q = 37.7 KBTU/hr
Pout = 11.0" W.C.

10.0
9.5
9.0

0

6

X

11.0

20

30

40
50
60
70
Capacity (KBTU/hr)

80

90

100

0

20

30

40
50
60
70
Capacity (KBTU/hr)

25M GAS CONTROL
PRODUCT INFORMATION
R-4080

features
Flip-Flop Convertible Regulator
Conversion from LP to NAT (or vice-versa)
accomplished by inverting the position of the
conversion screw and replacing the orifice.
No further adjustment is required (convertible
feature is CSA Int’l approved as a fixed-adjust
convertible regulator). No provision for field
adjustment as special tool is required.

“Flip-Flop”
Conversion Screw
(LP Position Shown)

Set Screw
(LP Setting)

Nylon ADJ Screw
(NAT Setting)
Shaft
Spring

Alternative Gas Paths

25M GAS CONTROL
PRODUCT INFORMATION
R-4080

7

models available
Each valve is uniquely defined by a model number
succeeded by the type number as follows:

25M

xx

x

–

xxx

BASIC MODEL NUMBER SERIES

SPECIFICATION OF OPTIONS/FEATURES

01 – Split Coil Model (For use with Power-Vented
Si Carbide Ignition Systems), 32˚-175˚ F

TYPE NUMBER CODING
Number

Pipe Size (inlet x outlet)

001-099

Rp Threads

02 – Redundant Solenoids (Valves in Series),
32˚-175˚F

100-199

3/8" x 11/32" (Orifice)

200-299

1/4" x 1/8" NPT

03 – Independently Operating Valves
(Dual Burner Applications), 32˚-175˚F

300-399

1/4" x 1/4" NPT

400-499

1/4" x 3/8" NPT

500-599

3/8" x 1/8" NPT

04 – Single Solenoid, 32˚-175˚ F

600-699

3/8" x 1/4" NPT

05 – Two-Stage Manifold, -40˚-175˚ F

700-750

3/8" x 3/8" NPT

751-799

Special Fittings

(751-779)
(780-799)

3/8" x 3/8" Inverted Flare
3/8" x 1/4" Compression Fitting

800-899

Regulated LP (25M01)

900-999

Available to be defined

11 – Same as 01 except 50 mbar rating
12 – Same as 02 except -40˚-175˚ F rating
13 – Same as 03 except convertible regulator,
-40˚-175˚ F rating
14 – Same as 04 except -40˚-175˚ F rating
16 – RV applications, -40˚-175˚ F, high sealing
force, regulated LP

Type numbers also define minor features, such as:
Customer Required Labelling
Inlet/Outlet Configuration
Natural Gas or LP Regulator Setting
Electrical Connections

18 – RV applications, Nat/LP Convertible
(Flip/Flop), -40˚-175˚ F
19 – Same as 16 except fixed regulator,
encapsulated leads

VOLTAGE LETTER CODING

22 – Same as 02 except Rp Threads

Letter

26 – Same as 12 except Rp Threads

Voltage

Frequency

None

24

60 Hz

A

120

60 Hz

B

120

50 Hz

C

24

50 Hz

43 – Same as 42 except slow-open, 0˚-60˚ C

F

100

50 Hz

47 – Same as 17 except EN-spec quiet DC,
0˚-60˚ C

G

240

60 Hz

H

220

50 Hz

M#

220/240

DC*

P#

24

50/60 Hz

S#

220/240

50/60 Hz

V

12

DC

X#

24

DC*

42 – Same as 02 except EN-spec quiet DC,
0˚-60˚ C

51 – Same as 01 except converted for LP use
(regulator blocked open)
72 – Same as 12 except High Capacity
82 – Same as 42 except High Capacity

* Rated for Full-Wave Rectified AC
# European Quiet-Type Solenoids

WHITE-RODGERS
WHITE-RODGERS DIVISION
EMERSON ELECTRIC CO.
9797 REAVIS ROAD ST. LOUIS, MISSOURI 63123-5398 USA
Tel: (314) 577-1300
Fax: (314) 577-1517
www.white-rodgers.com

R-4080



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