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Murphy Electromechanical Fuel Shutoff Valve M5081FS-B-2

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Murphy Electromechanical Fuel Shutoff Valve 24 VDC - Normally Energized - M5081FS-B-2

Product Condition: NEW
Murphy Electromechanical Fuel Shutoff Valve 24 VDC M5081FS-B-2
Estimated ship date: for orders by 3pm PT/6pm ET today Available for back order.

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The Murphy Electromechanical Fuel Shutoff Valve M5081FS-B-2 is a semi-automatic device for shutdown of natural gas fueled engines. The valve is opened manually and closes when the electromagnet is energized and trips the latch. The valve can be closed manually by turning the valve’s disconnect knob. This  normally energized model holds the valve open electrically and closes when the coil is de-energized. A vent in the valve body relieves trapped gas when the valve closes. A pop-out indicator button informs you when the valve is open or closed. The valve’s tripping power is provided by an engine ignition system or battery.

The M5081FS-B-2 is a 2 inch (51 mm) valve with 2 NPT connections. It has two SPDT snap-switches. The valve body is Steel and it has a normally energized circuit. This circuit allows the valve to be held open electrically and close by interruption of the coil’s power circuit. A manual trip knob is not available on this model.



  • Steel Body
  • Battery 12/24 VDC
  • Normally Energized
  • Instant Response to Shut Off Signal
  • Positive Valve Closure
  • Vents Gases Trapped After Shutdown



  • Part No.: M5081FS-B-2
  • Valve Body: Cast steel
  • Valve Seat: Buna-N
  • Maximum Pressure Rating: 100 psig (689 kPa) [6.89 bar]
  • Coil Rating: Intermittent duty; coil type must match power source;Energized to run (continuous-duty coil) coil resistance: 24 Volt model: 136 Ω (0.17 A)
  • Battery coil resistance : 7 Ω 24 VDC: 1.2 to 2.4 A
  • Wiring: Terminal blocks
  • Snap-switch Rating: 5 A @ 480 VAC
  • Shipping Weight: 40 lbs (18.14 kg)
  • Shipping Dimensions: 12 x 12 x 9-5/16 in. (305 x 305 x 237 mm)

Additional Information

Product Condition NEW
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