15700177 – Murphy Lube Level Maintainer – LM302-EX

The LM302-EX Level Maintainer automatically adds oil to the crankcase as needed to keep the lubelevel normal and will alarm and/or shutdown the equipment if the makeup supply is depleted andengine oil level falls or if overfill conditions exist. The unique design features two switches for low-and high-level shutdown or alarm.Thisexplosion proof model is CSA certified for Class I, Division I,Groups C & D; Class 2, Groups F & G hazardous locations.

This product may vary on delivery times, as factories do not guarantee production due to lack of raw materials.



  • Maintains proper lube level
  • Shutdown on low level, or high and low level
  • Low level alarm before shutdown
  • Manual float switch test
  • High visibility “Frog Eye” lens
  • Optional pipe or universal mounting brackets
  • Optional inlet orifices for low to high pressure applications
  • Explosion-proof models available

Product Specifications:

  • Case/Cover: Die cast aluminum
  • Switch Housing: Aluminum
  • Approval Rating: All CSA Certified with switch contacts rated at 10 A at250 VAC (standard)
  • LM302-EX:CSA certified for Class I, Groups C and D; Class II, Groups F and Ghazardous locations. Enclosure Type 4 certified
  • Float: Rigid polyurethane foam; Polyurethane coated
  • Max. Ambient Temperature:250° F (121° C)
  • Oil Inlet Connection:Top entry 1/2-14 NPT with built-in filter screen(Removable forcleaning)
  • Inlet Orifices: 1/4 in. (6 mm) standard; 1/8 in. (3 mm) available
  • Wire (switch models): 18 AWG x 13 in. (1.0 mm2 x 330 mm)
  • Max. Inlet Pressure (MIP): 30 psi (207 kPa) [2.07 bar] with 1/8 in. (3 mm) orifice15 ft oil (4.6 m oil) with 1/4 in. (6 mm) orifice
  • Max. Differential:2 in. (51 mm) between running and stationary oil level
  • Max. Case Pressure (MCP):15 psi (103 kPa) [1.03 bar]
  • Orifice Seal:Buna-N Thumb-Valve
  • Switch Contact:Silver, SPDT snap-acting, rated at 10 A @ 125, 250VAC; 10 A @ 30 VDC (1 only for low level; 2 only for high and low; or 2only for low level with alarm before shutdown)
  • LM302-EX:Two switches for low-and high-level shutdown or alarm.
  • Four wires, DPST, wired N.O. in normal operatingranges.
  • Outlet Connection: 3/4-14 NPT left side, right side, and bottom
  • Crankcase Balance Vent Fitting: 1/2-14 NPT
  • Mounting:Accepts Murphy pipe or universal mounting brackets
  • Lens:Clear Frog Eye non-staining, high-impact, high-temperature nylon.UV and heat stabilized
  • Dial: High visibility white background with green and white index lines fornormal level indication
  • Test Knob:Rotate to test switch operation. Turn clockwise for low leveltest and turn counterclockwise for high level test Locations Class I, Division 1, Groups C & D

Approximate shipping Weight and Dimensions

Part Number Weight Dimension
15700177 3.06 kg 10-5/8 x 8-7/8 x 6-3/4 in (270 x 225 x 171 mm)


WARNING: This product may expose you to chemicals which are known to the State of California tocause cancer, birth defects or other reproductive harm.

Informazioni aggiuntive

Peso 3,06 kg



15700177, LM302-EX