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Murphy LM300 Series Level Maintainer
液位维持计、液位控制开关-防爆液位开关
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:
LM300 EX系列型号（防爆）通过CSA认证，适用于I级1类危险区域。
规格参数:
保持适当的润滑油液位自动维持油位
低液位或高液位和低液位停机
停机前低液位报警
手动浮动开关测试
高能见度“青蛙眼”镜头
可选管道或通用安装支架
适用于低压至高压应用的可选入口孔板
提供防爆型号
不停机可显示油位状况
指形阀阀门确保进油口不堵塞，不漏油
外壳/盖子：压铸铝
开关外壳：铝制
认证等级：所有CSA认证，开关触点在250 VAC时额定电流为10 A（标准）
LM301至LM305：CSA认证，适用于非危险场所。外壳类型4认证
LM301-EX至LM305-EX：CSA认证，适用于I类C和D组；II级，F组和G组危险场所。外壳类型4认证。
浮子：硬质聚氨酯泡沫；聚氨酯涂层
最高环境温度：250°F（121°C）
进油口连接：顶部入口1/2-14 NPT，带内置滤网（可拆卸用于清洁）
入口节流孔：1/4英寸（6毫米）标准；提供1/8英寸（3毫米）
电线（开关型号）：18 AWG x 13 in.（1.0 mm2 x 330 mm）最大入口压力（MIP）：30 psi（207 kPa）[2.07 bar]，带1/8 in.（3 mm）孔板
15英尺油（4.6米油），带1/4英寸（6毫米）孔口
最大差速器：运行和静止油位之间2英寸（51毫米）
最大壳体压力（MCP）：15 psi（103 kPa）[1.03 bar]孔口密封：Buna-N指形阀开关触点：银色，SPDT速动，额定电流为10 A@125、250 VAC；10 A@30 VDC（1个仅用于低电平；2个仅用于高电平和低电平；或2个仅适用于低电平，并在停机前发出警报）
出口连接：3/4-14 NPT左侧、右侧和底部
曲轴箱平衡通风管接头：1/2-14 NPT
安装：接受Murphy管或通用安装支架
镜片：透明蛙眼无染色、高抗冲、高温尼龙；紫外线和热稳定
玻璃镜片：可在LM301和LM301-EX型号上使用。订购时指定GL作为型号的一部分
表盘：高能见度白色背景，绿色和白色指示线，用于正常液位指示
测试旋钮：旋转以测试开关操作。顺时针转动进行低电平测试，逆时针转动进行高电平测试。
- 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.
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LM301-EX Lube Level Maintainer; Explosion Proof (15700172)
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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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