Murphy M5081FS, M2582-P, M5180-P Installation And Operation Instructions Manual

M2582, M5081, and M5180 Series
Electromechanical and Pneumatic, Fuel Gas Shut­off Valves Installation and Operation Instructions

M2582 and M5081Series

Tripping Power From Engine Ignition System or Battery
(Models available for magneto, CD ignition or 12/24 V battery)

These fuel shut-off valves are semi-automatic devices for shutdown of
natural gas fueled engines. The standard valve opens by manual
operation of the reset handle. A latch in the upper body of the valve will
set and hold the valve open. At this point no electric power is used.
The electromagnetic coil is de-energized, the snap-switch(es) is SET.

If a SWICHGAGE®contact closes, a circuit is completed from power
through the snap-switch and coil. Now energized, the electromagnet
trips the latch, (latch can be tripped manually), the valve closes, and the
snap-switch resets. Power switches from the coil circuit to your choice
of an open line, an electrical ground, or an alarm. After tripping, the
vent seal opens, and on the M50 models, the open/close indicator (green
button) retracts to indicate that the valve is closed.
Valve body is sandcast aluminum. Optional cast steel for M5081 models.

M2582-P and M5180-P

MURPHY-NUMATIC

™

Pneumatic Version for Pressure

The M2582-P and M5180 pneumatically controlled valves can operate
from pressure, and are designed to open and close automatically or semi­automatically (the supply can be air, oil or gas).

NOTE: If using oil as a pressure source, use a lightweight oil.

These valves will open on rising control pressure and close on
decreasing control pressure. M2582-P and M5180-P automatically open
at 2 psi (14 kPa) [0.14 bar] and fully open at 3 psi (21 kPa) [0.21 bar].

All models include a built-in lever to aid in opening the valve manually.
The M2582-P can be manually opened against inlet pressure of 80 psi
(552 kPa) [5.52 bar]. The M5180-P valve can be opened against inlet
pressure of 100 psi (689 kPa) [6.89 bar].

Standard models include an escape vent for gas trapped forward in the
line after shut-off.

M5081FS

Normally Energized Circuit

The M5081FS is manually opened, electrically latched open and tripped
by interrupting the coil power circuit.

Magnetic Switch Adapter

As ignition systems wear from usage, their power output becomes less
and less. Ignition may not have the capacity to reliably trip the Fuel
Valve. Therefore, the use of a Magnetic Switch Adapter for CD
ignition systems is recommended. The Magnetic Switch Adapter is a
device that stores energy from the CD ignition to trip the Fuel Valve.
Three models are available:

65700053 (was 65020126): For use with negative ground ignitions
up to 240 VDC.

65700054 (was 65020127): For use with positive ground ignitions
up to 450 VDC.

65700055 (was 65020155): For use with negative ground ignitions
up to 450 VDC.

100 ohm, 2 watt Resistor

For Capacitor Discharge Ignitions that are specified to be grounded when
the valve closes, and a Magnetic Switch Adapter is in use. The resistor
must be connected in the system to prevent damage to the snap-switches
in the fuel shut-off valve (see typical wiring diagrams).

Diode Package

The Murphy diode package (65010065) is designed to allow the fuel shut­off valve to be used with dual Magneto Ignition systems.

NOTE: All aluminum versions of the M5081 Series Fuel Valve carry
Canadian Registartion Number OC1476.2.

*

M5081 model is CSA approved for Class I, Division 1, Groups C and D.
See Specifications on page 12.

GENERAL INFORMATION

Please read the following instructions before installing. A visual inspection of this product for damage during shipping is
recommended before mounting. It is your responsibility to have a qualified person install the unit and make sure installation
conforms with NEC and local codes.

M-7980N

Revised 11-02

Section 55

(00-02-0206)

BEFORE BEGINNING INSTALLATION OF THIS MURPHY PRODUCT

✔ Disconnect all electrical power to the machine.
✔ Make sure the machine cannot operate during installation.
✔ Follow all safety warnings of the machine manufacturer.
✔ Read and follow all installation instructions.

Model M5081

Approved

*

Installation M-7980N page 1 of 12

WARNING

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VALVE CUT-OUT

A.

Main Stem

B.

Pressure Disc/seal (in run/open)

C.

Pressure Disc/seal (in trip/closed)

D.

Vent Seal Gland

E.

Reset Knob (latches valve open)

F.

Manual Trip Knob (not available for M5081FS)

G.

Indicator Button (out with valve open)

H.

Pipe Plug

A

B

D

E

F

Understanding the Basic Operation

of the Fuel Shut-off Valve

The valve below is shown in the run (open) position.
Pressure is equalized, seat (B) is open, allowing
the fuel to flow. When valve is in the tripped position
(closed), seat closes (C).
The vent (D) opens to relieve trapped downstream fuel
to vent to a non-hazardous area.

C

NOTE:

If the vent-after-tripping feature is not used,
remove O-ring (D), to avoid condensation accumulation
that can hamper trip action.
Be sure to replace Pipe Plug (H) and to clean vent
periodically.

Vent to relieve trapped fuel
outside the hazardous area.

Terminal Block is
within this case.

G

Pipe Plug (remove to
install vent tube).

TYPICAL MODEL (M5081) SHOWN

H

FLOW CHARACTERISTICS

250

[7.08]

500

[14.16]

1000

[28.32]

1250

[35.40]

1500

[42.48]

1750

[4956]

2000

[56.64]

2250

[63.72]

2500

[70.80]

3000

[84.96]

2750

[77.88]

750

[21.24]

0

1.0

[25.4]

2.0

[50.8]

3.0

[76.2]

4.0

[101.6]

5.0

[127.0]

6.0

[152.4]

7.0

[177.8]

8.0

[203.2]

9.0

[228.6]

10.0

[254.0]

4 oz. (0.11 kg.)

10 oz. (0.28 kg.)

5 psig (34 kPa) [0.34 bar]

10 psig (69 kPa) [0.69 bar]

20 psig (138 kPa) [1.38 bar]

30 psig (207 kPa) [2.07 bar]

4 oz. (0.11 kg.)

10 oz. (0.28 kg.)

5 psig (34 kPa) [0.34 bar]

10 psig (69 kPa) [0.69 bar]

20 psig (138 kPa) [1.38 bar]

30 psig (207 kPa) [2.07 bar]

4 oz. (.11 kg.)

M2582 Series

M5081 and
M5180 Series

Inches water column (∆p) drop across valve.

Millimeters water column in brackets [ ].

Standard cubic feet per hour. Cubic meters per hour in brackets [ ].

Inches water column (∆p) drop across valve.

Millimeters water column in brackets [ ].

Standard cubic feet per hour. Cubic meters per hour in brackets [ ].

Installation M-7980N page 2 of 12

3.0

[76.2]

2.0

[50.8]

4 oz. (.11 kg.)

4 oz. (.11 kg.)

10 oz. (.28 kg.)

10 oz. (.28 kg.)

10 psig (69 kPa) [.69 bar]

1.0

[25.4]

500

0

[14.16]

1000

1500

[28.32]

[42.48]

2000

2500

[56.64]

[70.80]

10 psig (69 kPa) [.69 bar]

20 psig (138 kPa) [1.38 bar]

20 psig (138 kPa) [1.38 bar]

30 psig (207 kPa) [2.07 bar]

30 psig (207 kPa) [2.07 bar]

3000

3500

4000

[84.96]

[99.12]

[113.28]

4500

[127.44]

5000

[141.60]

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DIMENSIONS

M2582

M5180-P

Magnetic Switch Adapters

65700053

(was 65020126); 65700054 (was 65020127); 65700055 (was 65020155)

M2582-P

CAUTION: THE ARROW ON THE SIDE OF THE FUEL VALVE MUST POINT TO THE CORRECT DIRECTION OF THE

FLOW, FROM FUEL SOURCE TO THE ENGINE. APPLY PIPE DOPE ONL

Y TO FUEL PIPE, NOT TO THE FUEL VALVE.

Installation M-7980N page 3 of 12

Manual Trip

Knob

1/4 NPT
Vent and Plug

Reset Knob

3-3/32 in.
(79 mm)

5-1/2 in. (140 mm)

Latch Arm (see NOTE 2)

Breather Vent
(see NOTE 1)

2 NPT
(2 places)

Vent and Plug
1/2 NPT

1/2 NPT Conduit
Connection

1 NPT
(2 places)

7-5/16 in.
(186 mm)

9-3/8 in. (238 mm)

10-7/16 in. (265 mm)

1/4 in. (6 mm) tube connection; control
pressure 3 psi (21 kPa) [0.21 bar] minimum,

Latch Arm (see NOTE)

Breather/Vent

1/16 in. (2 mm)

1 NPT
(2 places)

1/4 NPT

Vent and

Plug

3-3/32 in.
(79 mm)

5-1/2 in. (140 mm)

NOTE: Thumb operated opening latch (2.5 psi [17 kPa]

[0.17 bar] required to release cocking latch)

1/4 in. (6 mm)
connection;
control pressure
3 psi (21 kPa)
[0.21 bar] minimum,
80 psi (552 kPa)
[5.52 bar] maximum
(see NOTE 1)

75 psi (517 kPa) [5.17 bar] maximum.

6-9/16 in.
(167 mm)

6-1/8 in.

(156 mm)

4-3/8 in.

(111 mm)

4-1/4 in.

(108 mm)

NOTE 1: Control pressure connection fitting and breather vent fitting can be swapped to convert to vacuum control.
NOTE 2: Thumb operated opening latch (2.5 psi [17 kPa] [0.17 bar] required to release cocking latch).

Panel Mount screws

10-24 N.C. x

5/16 in. (8 mm) long

2-5/16 in. (59 mm)

1-15/32 in.

(37 mm)

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3/8 in.
(10 mm)

31/32 in.
(25 mm)

15/32 in.
(12 mm)

Terminal screws

8-32 N.C. x

1/4 in. (6 mm) long

2-5/8 in. (67 mm)

GND ALT1 ALT2 SW

1-23/32 in.
(44 mm)

2-7/16 in.
(62 mm)

DIMENSIONS

continued

M5081 and M5081FS

M5081-3 Steel Flanged Option

CAUTION: THE ARROW ON THE SIDE OF THE FUEL VALVE MUST POINT TO THE CORRECT DIRECTION OF THE

FLOW, FROM FUEL SOURCE TO THE ENGINE. APPLY PIPE DOPE ONL

Y TO FUEL PIPE, NOT TO THE FUEL VALVE.

Installation M-7980N page 4 of 12

Manual Trip Knob

Inlet
Breather

Vent and Plug
1/2 NPT

(M5081 only)

9-3/8 in. (238 mm)

1/2 NPT Conduit

Reset Knob

Connection (2 plcs.)

10-5/16 in.
(262 mm)

Indicator

Button

2 NPT

(2 places)

3 in. (76 mm)

7-3/4 in. (197 mm)

1-3/8 in. (35 mm)

3-7/16 in.

(87 mm)

4-1/16 in.
(103 mm)

14-25/64 to 14-29/64 in.

(366/367 mm)

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3-5/8 in.
(92 mm) dia.

2 in. (51 mm) dia. 2 places

150# RF (raised face) pipe flange

45°

3/4 in. (19 mm) dia.
(4 places) each end
equally spaced on a
15/32 in. (121 mm) b.c.
(bolt circle)

INSTALLATION

Connecting the Fuel Shut-off Valve

1. Before connecting the unit, apply pipe dope to plumbing male threads
that will be inserted into the valve. Do not apply pipe dope to the valve.

2. Make sure that the arrow on the side of the valve indicates the correct
direction of the flow.

3. Fuel shut-off valves can be installed in all three planes. However,
mounting the valve horizontally (with vent pointing down) is
recommended. Do not install valve with top down. (Refer to Figure 1.)

4. Hold valve in position, (use a tool on valve wrench flats) and tighten
plumbing into inlet and outlet ends. (Refer to dimensions on pages 3-4.)

5. To mount flanged models, follow the appropriate installation codes
and ordinances for the application. (For dimensions see page 4.)

6. A vent line (to allow gas trapped forward between fuel valve and the
carburetor to escape) should be attached to the vent connection at the
bottom of the valve housing. Remove the plug and install the line.
(Refer to Figure 1.)

Connecting Pneumatic Models

M2582-P and M5180-P

1. Repeat the steps above (1 thru 5), and observe the necessary cautions.

2. A lever/arm (handle) and a cocking latch are provided to allow manual

opening of the valve. The thumb-operated latch can be locked in place
to hold the lever/arm latched. The cocking latch will be released when
pilot pressure reaches 2.5 psi (17 kPa) [0.17 bar]). M2582-P and
M5180-P automatically open at 2 psi (14 kPa) [0.14 bar], and fully
open at 3 psi (21 kPa) [0.21 bar]. See Specifications, page 12 for
maximum control pressure.

3. If vacuum control is desired, swap the Control Pressure connection
fitting and the Breather Vent fitting on your M5180-P model (see Fig. 2).

WARNING: STOP THE ENGINE AND DISCONNECT ALL ELECTRICAL POWER BEFORE BEGINNING INSTALLATION. BEGIN THE

INSTALLATION BY SECURING AREA OF ANY HAZARDOUS CONDITIONS. SHUTOFF THE FUEL GAS SUPPLY. FOR HAZARDOUS
APPLICATIONS REFER TO NATIONAL ELECTRICAL CODE SPECIFICATIONS.

Figure 1

Physical Location and Plumbing (typical)

Figure 2

Pull the lever up, and press the latch

down into ridge with thumb.

CAUTION: DO NOT TWIST THE VALVE BODY HOUSING.

CAUTION:

BE SURE PNEUMATIC SOURCE

RELEASES THE MECHANICAL LATCH WHEN RUNNING.

Installation M-7980N page 5 of 12

Master Regulator

(High pressure)

Control Pressure

Fuel Shut-off Valve

Wrench Flats

FUEL FLOW

Bypass

Regulator

Remove plug and attach vent line.

Route to non-hazardous area.

Fuel
Filter

Carburetor

Level Arm (Handle)

Connection

Thumb-operated

Cocking Latch

Breather

Vent

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Internal Wiring
for M2582

M5081 Internal
Wiring

M2582 Internal Wiring

Wiring shown in normal mode of operation (seat open). The 20 AWG
(0.75 mm2) wire is color coded to the coil:

For CD ignitions: White and Orange
For Magneto ignitions: White and Green
For Battery: White and Blue

Conduit Installation

Install a 1/2 NPT conduit from the M2582 conduit connection to the
power source. See M2582 Dimensions (page 3) for location.

For wiring the M2582 fuel valve to Solid-State TATTLETALE

®

annunciators, refer to pages 9, 10, and 11.

M5081 Internal Wiring

Wiring shown in normal mode of operation (seat open). The 18 AWG
(1.0 mm2) wire is color coded to the coil:

For CD Ignitions: White and Orange
For Magneto Ignitions: White and Green
For Battery: White and Blue

Conduit Installation

Install a 1/2 NPT conduit from the M5081 conduit connection to the
power source. Refer to Dimensions (on page 4) for location.

For typical wiring of the M5081 models refer to pages 7 and 8.

For wiring the M5081 fuel valves to Solid-State TATTLETALE

®

annunciators, refer to pages 9, 10, and 11.

M5081FS Internal Wiring

For typical Wiring refer to page 8.

For wiring the M5081FS to MARK IV 12/24 refer to page 10.

Magnetic Switch Adapters for Use with
Capacitor Discharge Ignitions

Connect the Magnetic Switch Adapter between the fuel Valve
terminal 1 and the CD Ignition. See wiring diagrams (pages 7

and 11).

WARNING: PERFORM THE WIRING OPERATION WITH THE POWER SOURCE “OFF” AND THE AREA MADE NON-HAZARDOUS.

MAKE SURE THE VOLTAGE AND CURRENT REQUIREMENTS ARE WITHIN THE FUEL SHUT-OFF VALVE RATINGS. HARD CONDUIT
WITH APPROVED SEALS IS REQUIRED BY THE NEC FOR HAZARDOUS AREA INSTALLATIONS.

NOTE:
For grounding the ignition (CD models only)

through the fuel valve snap-switch, use a
Magnetic Switch Adapter (see Magnetic
Switch Adapter, below) and install a 100
ohm; 2 watt resistor (included on page 11).

NOTE: For grounding the ignition (CD models only) through the fuel
valve snap-switches, use a Magnetic Switch Adapter, see Magnetic

Switch Adapter, below and the “TO CLOSE THE FUEL VALVE and
GROUND THE IGNITION” attachment, and install a 100 ohm; 2

watt resistor (included with your attachment).

NOTE: Wiring shown in normal mode of operation (seat open). The 18 AWG (1.0 mm2)

wire is red color for both options: 12 VDC and 24 VDC.

WIRING INFORMATION

GND

ALT

1

SW

+

ALT

2

IN4007

Negative ground

Magnetic Switch Adapter shown

65700053 (was 65020126): For use with

negative ground ignitions up to 240 VDC.

65700054 (was 65020127): For use with

positive ground ignitions up to 450 VDC.

65700055 (was 65020155): For use with

negative ground ignitions up to 450 VDC.

Installation M-7980N page 6 of 12

FV–

FV+

(IGN)

White

Orange

FV–

FV+

(IGN)

White

Orange

White

Black

Red

Ground

Ground

10

Jumper

Valve

Coil

7265 19384

Disconnect

Switches

Ignition 1 Ignition 2

Jumper

(See Note)

Optional
Resistor
(Note)

Optional

Resistor

Valve

Coil

Switch 2

Ground

10

7265 19384

Switch 1

(Note)

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g

TYPICAL WIRING for M5081-C (CD IGNITION MODELS)

Start-run

timer

To additional
TATTLETALE

®

7265 1938 4

Ground

10

+

--

DC Power

source

M5081-B

Battery Models

Terminal Block

Jumpers

MS2110

IN4005 Diode

for flyback protection

*

*

6 2 3

5

1 4

MS2110

6 2 3

5

1 4

TYPICAL WIRING for M5081-B (BATTERY IGNITION MODELS)

Installation M-7980N page 7 of 12

10

Ground

Start-run

timer

MS2100

6 2 3

1

M5081-C

CD Ignition Models

Terminal Block

7265 1938 4

Jumpers

4

5

MS2100

6 2 3

1

GND ALT1 ALT2 SW

CD ignition

100 ohm, 2 watt
Resistor

4

5

(Notes 3 and 4)

To additional
TATTLETALE

Magnetic

Switch

Adapter

Additional

CD ignition

®

NOTE 1: To CLOSE FUEL VALVE–NOT GROUNDING THE IGNITION (Single CD Ignition Systems) Remove the factory-installed jumper on terminals 6-5.

Do NOT ground terminal 6.
NOTE 2: To CLOSE FUEL VALVE–NOT GROUNDING THE IGNITIONS (Dual CD Ignition Systems) Remove the jumper on terminals 6-5.

Connect second ignition to Magnetic Switch Adapter terminal ALT2.
NOTE 3: To CLOSE FUEL VALVE and GROUND THE IGNITION (Single CD Ignition Systems) Remove the jumper on terminals 6-5.

Connect a 100 ohm, 2 watt resistor between valve terminals 1-2. Ground terminal 6.

NOTE 4: To CLOSE FUEL VALVE and GROUND THE IGNITION (Dual CD Ignition Systems) Remove the jumper on terminals 6-5. Connect a 100 ohm,
2 watt resistor between valve terminals 1-2. Ground terminal 6. Connect second i

nition to Magnetic Switch Adapter terminal ALT2.

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TYPICAL WIRING for M5081-A (MAGNETO IGNITION MODELS)

g

TYPICAL WIRING for M5081FS (NORMALLY ENERGIZED MODELS)

Installation M-7980N page 8 of 12

M5081-A

Magneto Ignition Models

Terminal Block

7265 1938 4

Jumpers

MS2120

Magneto

Additional

Magneto

MS2120

65010065
Diode Package
(See Notes 2/4)

Start-run

10

Ground

timer

6 2 3

1 4 6 2 3

5

1 4

5

To additional
TATTLETALE

®

NOTE 1: To CLOSE FUEL VALVE–NOT GROUNDING THE IGNITION (Single Magneto Systems) Remove the factory-installed jumper on terminals 6-5.

Do NOT ground terminal 5.
NOTE 2: To CLOSE FUEL VALVE–NOT GROUNDING THE IGNITIONS (Dual Magneto Systems) Remove the factory-installed jumpers on terminals 6-5 and 9-8.

Add 65010065 diode package as shown. Do NOT ground terminals.

NOTE 3: To CLOSE FUEL VALVE and GROUND THE IGNITION (Single Magneto Systems) The factory-installed jumpers (6-5 and 9-8) must be in place.
Add ground wire to terminal 5.

NOTE 4: To CLOSE FUEL VALVE and GROUND THE IGNITION (Dual Magneto Systems) Remove the jumper on terminals 9-8.
Add 65010065 diode packa

e as shown. Add ground wire to terminal 5.

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M5081FS

12 or 24 VDC Models

Terminal Block

10

Ground

MS2110 MS2110

6 2 3

1 4 6 2 351 4

7265 1938 4

Ground

5

*

*

*

Start-run timer

+

--

DC Power

source

IN4005 Diode

*

for flyback protection

IGN 1

NO

C

NC

Relay
Contacts

FV(+)

GND

M2582 Fuel Valve

White

Black

Red

Ground

LCDT-PS-CD-N

*

Relay contacts rated: 3 A, 30 VDC, 4 A, 125/250 VAC

FV(-)

*

+

–

IGN 1

F/V+

F/V-

GRD

MARK IV-N
terminal block

M2582 Fuel Valve

White

Black

Red

Ground

+

–

M2582 Fuel Valve

White

Black

Red

Ground

LCDT-PS-CD (R)-P

IGN 1

FV(-)

NO

C

NC

Relay
Contacts

FV(+)

GND

Relay contacts rated: 3 A, 30 VDC, 4 A, 125/250 VAC

+

–

TYPICAL WIRING to SOLID-STATE TATTLETALE®Annunciators

M2582-C

to LCDT-PS-CD (R)-P (positive ground)

M2582-C

to LCDT-PS-CD-N (negative ground)

M2582-C

to MARK IV-N (negative ground)

WARNING: PERFORM THE WIRING OPERATION WITH THE POWER SOURCE “OFF” AND THE AREA MADE NON-

HAZARDOUS. MAKE SURE THE VOLTAGE AND CURRENT REQUIREMENTS ARE WITHIN THE FUEL SHUT-OFF VALVE RATINGS.
HARD CONDUIT WITH APPROVED SEALS IS REQUIRED BY THE NEC FOR HAZARDOUS AREA INSTALLATIONS.

M5081-C

to LCDT-PS-CD (R)-P (positive ground)

M5081-C

to LCDT-PS-CD-N (negative ground)

M5081-C

to MARK IV-N (negative ground)

Installation M-7980N page 9 of 12

M5081 Terminal block

7265 1938410

jumperjumper

FV(-) FET output rated: 0.5 A @ 250 VDC max.

*

Relay contacts rated: 3 A, 30 VDC, 4 A, 125/250 VAC

M5081 Terminal block

7265 1938410

jumperjumper

FV(-) FET output rated: 0.5 A @ 250 VDC max.

*

Relay contacts rated: 3 A, 30 VDC, 4 A, 125/250 VAC

LCDT-PS-CD (R)-P

Terminal block

+

–

IGN 1

GND

FV

FV(-)

*

NO

C

NC

LCDT-PS-CD-N
Terminal block

+

–

IGN 1

FV(+)

FV(-)

*

GND

NO

C

NC

Relay
Contacts

Relay
Contacts

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M5081 Terminal block

7265 1938 410

jumperjumper

MARK IV has FET outputs rated: 0.5 A @ 250 VDC max.

*

F/V+

F/V-

GRD

MARK IV-N
terminal block

IGN 1

*

TYPICAL WIRING to SOLID-STATE TATTLETALE®Annunciators

WARNING: PERFORM THE WIRING OPERATION WITH THE POWER SOURCE “OFF” AND THE AREA MADE NON-

HAZARDOUS. MAKE SURE THE VOLTAGE AND CURRENT REQUIREMENTS ARE WITHIN THE FUEL SHUT-OFF VALVE RATINGS.
HARD CONDUIT WITH APPROVED SEALS IS REQUIRED BY THE NEC FOR HAZARDOUS AREA INSTALLATIONS.

M5081-B

to MARK IV-12/24

M5081FS

to MARK IV-12/24

M5081FS

to MARK III-12/24

M5081-C

to MARK III-N

M5081-C

to TTDJ-IGN-(T)

M2582-C

to TTDJ-IGN-(T)

Installation M-7980N page 10 of 12

M5081FS Terminal Block

7265 1938410

*

IN4005 Diode

*

for flyback protection

1

MARK IV has FET outputs rated: 0.5 A @ 250 VDC max.

M5081FS Terminal Block

7265 1938 410

*

IN4005 Diode

*

1

MARK III has FET outputs rated:

0.5 A @ 250 V max.

2

Auxiliary Relays must be
hermetically-sealed, third party
certified for use in Class I,
Division 2, Gps. C & D areas.

for flyback protection

MARK IV-12/24
terminal block

+

--

DC Power

source

1

MARK III-12/24
terminal block

12/24
S/D

FV
ALM
GRD

*

*

K1

K2

+–

+–

1

12/24V
SD
F/V
GRD

+

--

12/24 VDC

Power source

2

Auxiliary Relay

2

Auxiliary or
Shutdown Relay

M5081-B

7265 1938 410

*

jumperjumper

IN4005 Diode

*

for flyback protection

1

MARK IV has FET outputs rated: 0.5 A @ 250 VDC max.
Remove shunt jumper E2 for ignition ground time delay.

M5081 Terminal block

7265 1938 410

jumperjumper

IN4005 Diode

*

MARK III has FET outputs rated:

†

0.5 A @ 250 V max.

††

Alarm Relay must be
hermetically-sealed, third party
certified for use in Class I,
Division 2, Gps. C & D areas.

for flyback protection

K1K2

+

--

DC Power

source

K1 and K2:
External
Relay(s)

F/V

GRD

MARK IV-12/24
terminal block

*

+––

K1

MARK III-N

†

terminal block

S/D

††

IGN
+FV

-FV
ALM
GRD

–

K1

*

+

12/24V

1

Alarm Relay

Power
Supply

Ignition
90-250 Vdc

K2

–

*

+

M5081 Terminal block

7265 1938 410

jumperjumper

1-800-548-1191 - http://www.partdeal.com - [e-mail]

M2582 Fuel Valve

IGN
NA

GRD

FV+

FV­ALR
NA
NA

Black

Red

White

+

–

IGN
NA

GRD

FV+

FV­ALR
NA
NA

TYPICAL WIRING to SOLID-STATE TATTLETALE®Annunciators

continued

WARNING: PERFORM THE WIRING OPERATION WITH THE POWER SOURCE “OFF” AND THE AREA MADE NON-

HAZARDOUS. MAKE SURE THE VOLTAGE AND CURRENT REQUIREMENTS ARE WITHIN THE FUEL SHUT-OFF VALVE RATINGS.
HARD CONDUIT WITH APPROVED SEALS IS REQUIRED BY THE NEC FOR HAZARDOUS AREA INSTALLATIONS.

(A) M5081-B

to TTDJ-DC-(T)

TTDJ-DC-(T)

to Relays

Connections Shown for Use with

Diagrams (A), (B), (C), and (D) on this page.

(C) M2582-C

w/Magnetic

Switch Adaptor to CD Ignition

(D) M5081-C

w/Magnetic

Switch Adaptor to CD Ignition

M5081FS

to TTDJ-DC-(T)

(B) M2582-B

to TTDJ-DC-(T)

Installation M-7980N page 11 of 12

M5081 Terminal block

7265 1938 410

jumperjumper

1

K1 and K2 are hermetically Sealed

To 12 or 24 VDC
power supply

*

K2

1

auxiliary relays, third party certified for
use in Class I, Div. 2, Gps. C & D areas.

* 1N4005 diode for flyback protection

.

IGNITION RELAY

12-24 VDC
Power supply

1

K1 and K2 are hermetically Sealed
auxiliary relays, third party certified for
use in Class I, Div. 2, Gps. C & D areas.

* 1N4005 diode for flyback protection

1

–+

K1

*

1

+

–

K2

*

.

To 12 or 24 VDC
power supply

M2582 Fuel Valve

White

SD
10-32VDC
GRD

K1

NA
FV
ALR

MPU

GRD

1

K1 and K2 are hermetically Sealed

Red

Black

K2

K1

1

SD

10-32VDC

GRD
NA
FV
ALR
MPU
GRD

auxiliary relays, third party certified for
use in Class I, Div. 2, Gps. C & D areas.

To 12 or 24 VDC
power supply

.

SD

10-32VDC

GRD
NA
FV
ALR
MPU
GRD

SD

10-32VDC

GRD
NA
FV
ALR
MPU
GRD

M5081FS Terminal Block

7265 1938 410

*

* 1N4005 diode for flyback protection

Magnetic

Switch

Adapter

M2582 Fuel Valve

White

Black

Red

1

K2 is hermetically sealed auxiliary relay, third party
certified for use in Class I, Div. 2, Gps. C & D areas.

1-800-548-1191 - http://www.partdeal.com - [e-mail]

GND ALT1 ALT2 SW

K2

1

Magnetic

Switch

M5081 Terminal block

GND ALT1 ALT2 SW

+

–

7265 1938 410

jumperjumper

1

K2 is hermetically sealed auxiliary relay, third party

K2

1

+

–

certified for use in Class I, Div. 2, Gps. C & D areas.

Adapter

CONTROL SYSTEMS & SERVICES DIVISION

P.O. Box 1819; Rosenberg, Texas 77471; USA
[phone] fax [phone]

e-mail [e-mail]

MURPHY DE MEXICO, S.A. DE C.V.

Blvd. Antonio Rocha Cordero 300, Fracción del Aguaje
San Luis Potosí, S.L.P.; México 78384
[phone] fax [phone]
Villahermosa Office [phone]
e-mail [e-mail]
www.murphymex.com.mx

FRANK W. MURPHY, LTD.

Church Rd.; Laverstock, Salisbury SP1 1QZ; U.K.
[phone] fax [phone]
e-mail [e-mail]
www.fwmurphy.co.uk

MURPHY SWITCH OF CALIFORNIA

41343 12th Street West
Palmdale, California 93551-1442; USA
[phone] fax [phone]
e-mail [e-mail]
www.murphyswitch.com

In order to consistently bring you the highest quality, full featured products, we reserve the right to change our specifications and designs at any time.

MACQUARRIE CORPORATION

1620 Hume Highway
Campbellfield, Vic 3061; Australia
[phone] fax [phone]

e-mail [e-mail]

FW Murphy

P.O. Box 470248
Tulsa, Oklahoma 74147 USA
[phone]

fax [phone]
e-mail [e-mail]

www.fwmurphy.com

R

E

G

I

S

T

E

R

E

D

USA–ISO 9001:2000 FM 28221

UK–ISO 9001:2000 FM 29422

Printed in U.S.A. 0966106

M2582 M5081 M5081FS

M5081FS Coil Assembly

12 VDC
24 VDC

Latch Block Assembly

Latch block assembly
Latch block switch and coil assembly
Latch block switch and mounting bracket assembly

Coil Assembly

Battery
CD Ignition
Magneto Ignition

55000128
55000129
55000094

-----------­55000096

55000097 55000137 --------------- --------------- ---------------

55000102

------------

55000102

------------

5500148

------------

55000154

------------

55000095

------------

------------

55000074

-----------­55000118

------------

-----------­55000196

------------

------------

------------

------------

------------

------------

------------

------------

------------

------------

55000158
55000159

------------

------------

------------

------------

55000126
55000127
55000080

------------

------------

------------

------------

------------

------------

------------

------------

------------

SERVICE PARTS

M2582-P

M5180-P

Handle and Latch Kit

Handle and latch kit
Handle kit

Manual DIsconnect Assembly

55000098 55000072 55000160 --------------- ---------------

Snap Switch Assembly

------------ 55000138 55000138 --------------- ---------------

Close/Open Indicator Assembly

55000093 55000075

55000135 55000147 55000135

Stem and Seat Kit

55000146 55000131 55000161 55000150 55000155

Top Works Complete Valve Less Body and Vent

55000143 55000132

55000132

65700053

65700053

------------

65010065 ------------

------------ ------------

65700054

65700054

65700055

65700055

55000143

55000132

Vent Bushing Assembly

------------ ------------

------------

55000184 55000153

Diaphragm Assembly

------------

------------ ------------

------------

------------

------------

------------

------------

------------

------------

------------

------------

00007908

55050420

Pilot Diaphragm

Single/Dual ign. – negative ground up to 240 VDC

Single/Dual ign. – positive ground up to 450 VDC

Single/Dual ign. – negative ground up to 450 VDC

Diode Package for Dual Magneto Ignitions

Magnetic Switch Adapter for CD Ignitions

SPECIFICATIONS

Valve Body: Sandcast aluminum, painted red (corrosion resistance);

Optional cast steel available for M5081 and M5081FS models only.

Valve Seat: Buna-N

Maximum Valve Inlet Pressure:

• M2582/M2582-P: 80 psi (552 kPa) [5.52 bar]

• M5081/M5081FS/ M5180-P: 100 psi (689 kPa) [6.89]

Maximum Control Pressure (Pneumatic Models):

• M2582-P: 75 psi (517 kPa) [5.17 bar]

• M5180-P: 80 psi (552 kPa) [5.52 bar]

Snap-switch: M2582: One SPDT, 5 A @ 480 VAC

M5081, and M5081FS: Two SPDT, 5 A @ 480 VAC

Wiring: M2582: Wire leads; M5081, and M5081FS: Terminal blocks

NOTE: All aluminum versions of the M5081 Series Fuel Valve carry
Canadian Registartion Number OC1476.2.

Coil Rating: Intermittent duty; coil type must match power source;

• CD ignition coil resistance: 72 Ω
CD ignition primary voltage: 1.38 to 3.8 A

• M5081FS: Energized to Run (continuous-duty coil) coil resistance:

12 V model: 33 Ω;
24 V model: 136 Ω

• Magneto ignition coil resistance: 0.5 Ω

Magneto primary voltage: 1 to 5 A

• Battery coil resistance : 7 Ω

12 or 24 VDC: 1.2 to 2.4 A

Laboratory Approval: CSA listed for Class I, Groups C and D
Hazardous Locations. 5 amps maximum; intermittent duty; models
M5081 and M5081-CD engine ignition powered, and model M5081-B, 12
or 24 VAC or VDC; switch contacts rated 5 A @ 480 VAC maximum.
Maximum pressure 100 psi (689 kPa) [6.89 bar].

Installation M-7980N page 12 of 12

Warranty

A limited warranty on materials and workmanship is given with this FW Murphy product.

A copy of the warranty may be viewed or printed by going to www.fwmurphy.com/support/warranty.htm

1-800-548-1191 - http://www.partdeal.com - [e-mail]