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Murphy LM300 Series Level Maintainer
液位维持计、液位控制开关

LM300 SERIES
The LM300 Series Level Maintainer automatically adds oil to the crankcase as needed to keep the lube level normal.

MURPHY LM300系列油位保持器根据需要自动向曲轴箱加油,以保持润滑油油位正常。大多数型号都内置开关,如果补给供应耗尽,发动机油液位下降或过充条件存在,则会报警和/或关闭设备。LM300可用于发动机、压缩机、泵和冷却器。 LM300 Series Level Maintainer automatically adds oil to the crankcase as needed to keep the lube level normal. Most models have built-in switches that will alarm and/or shut down the equipment if the makeup supply is depleted and engine oil level falls or if overfill conditions exist. The LM300 can be used in engines, compressors, pumps, and coolers.

MURPHY LM300 Series Level Maintainer pdf catalog

 

LM300 Series EX models (explosion-proof) are CSA certified for Class I, Division 1 Hazardous areas.

规格参数:

Maintains proper lube level 自动维持油位
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
不停机可显示油位状况
Thumb-valve™阀门确保进油口不堵塞,不漏油

 

  • Case/Cover : Die cast aluminum
  • Switch Housing : Aluminum
  • Approval Rating : All CSA Certified with switch contacts rated at 10 A at 250 VAC (standard)
  • LM301 through LM305 : CSA certified for non-hazardous locations. Enclosure Type 4 certified
  • LM301-EX through LM305-EX : CSA certified for Class I, Groups C and D; Class II, Groups F and G hazardous 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 for cleaning)
  • 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) orifice
    • 15 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, 250 VAC; 10 A @ 30 VDC (1 only for low level; 2 only for high and low; or 2 only for low level with alarm before shutdown)
  • 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
  • Glass Lens : Available on LM301 and LM301-EX models. Specify GL as part of model number when ordering
  • Dial : High visibility white background with green and white index lines for normal level indication
  • Test Knob : Rotate to test switch operation. Turn clockwise for low level test and turn counterclockwise for high level test.

The LM300 Series Level Maintainer automatically adds oil to the crankcase as needed to keep the lube level normal. Most models have built-in switches that will alarm and/or shutdown the equipment if the makeup supply is depleted and engine oil level falls or if overfill conditions exist.

LM300 series explosion-proof models are CSA certified for Class I, Division 1 Hazardous areas.

LM301-EX Lube Level Maintainer; Explosion Proof (15700172)
LM301 Lube Level Maintainer (15700170)

 

Base Models

* LM300: Level Maintainer only (no switches). LM301: Low switch contacts for low level shut down or alarm. Four wires, SPDT.

* LM302: Two switches for low and high level shutdown or alarm. Four wires, DPST, wired N.O. in normal operating ranges.

*LM303: Two switches for low and high level shutdown or alarm. Four wires, DPST, wired N.C. in normal operating ranges.

*LM304: Two switches. Alarm before shutdown on low level and shutdown on low-low level. Four wires, DPST, wired N.O. in normal operating ranges.

*LM305: Two switches. Alarm before shutdown on low level and shutdown on low-low level.Four wires, DPST, wired N.C. in normal operating ranges.

LM301-EX Lube Level Maintainer; Explosion Proof (15700172)
LM301 Lube Level Maintainer (15700170)

产品应用 :

Engines发动机
Pumps泵
Compressors压缩机
Coolers冷却器 空冷风机

 

MURPHY LM300 Series Level Maintainer Downloads

For more information about this product, you can download the related literature here:



 


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