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| Flow rate alarms |
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Utilized in applications such as mobile hydraulic equipment and industrial process control, ensures sufficient flows of coolants and lubricants.
UL-approved:
Lake Flow Alarms are UL Approved for loads up to 10 amp @ 110/220 VAC.
Field adjustable alarm setting:
Only an allen wrench is required to change the flow alarm setting.
Weather-tight construction: Rugged cast aluminum NEMA type 4X enclosure allows installation in outdoor applications and in environments where liquid tight seals are required.
Simple on/off logic: Positive alarm points using 10 A., dry-contact, SPDT switches reduce the complexity found in standard rotameter OFF/ON/OFF circuits.
Pre-wired with cable disconnect: The standard Hirschmann interconnection provides easy installation and maintenance of the FLOW ALARM and the system it is a part of.
Unrestricted mounting: Allows the designer to install the monitor in any orientation-horizontal, vertical or inverted.
Economical protection: This monitor rapidly pays for itself as it “sounds the alarm” on incorrect pneumatic, lubrication or cooling volumes, protecting expensive equipment and reducing downtime.
Quality assurance: Can be an integral part of a quality control system, yielding consistent system operation.
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Engineering specifications:
The in-line Flow Rate Monitor/Alarm Shall:
• Have field adjustable, dry-contact, alarm setting(s)
• Use the variable annular orifice technique with compression spring recoil
• Not require inlet or outlet straight plumbing, or require vertical pipe mounting
• Have a measuring accuracy of ±2.5% of full scale in the center third of the measuring range, and ±4% in upper and lower thirds
• Have a maximum working pressure rating of 3500 or 6000 PSIG for liquids
• Have a maximum working pressure rating of 600 or 1000 PSIG for gasses
• Have a stainless steel sharp-edged orifice
• Have a weather-tight NEMA type 4X external construction
• Be Lake Monitors No. M _ _ – _ _ _ – _ _ for single alarm applications, or N _ _ – _ _ _– _ _ for dual alarm applications
| Materials of Construction (Wetted Components) |
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Aluminum |
Brass |
Stainless steel |
| High-pressure casing, end ports and tapered shaft |
Aluminum |
Brass |
303 Stainless steel |
| Seals |
Buna-N (STD), EPR, Viton or Kalrez |
Buna-N (STD), EPR, Viton or Kalrez |
Buna-N (STD), EPR, Viton or Kalrez |
| Transfer Magnet |
Teflon coated Alnico |
Teflon coated Alnico |
Teflon coated Alnico |
| Floating Orifice disk |
Stainless Steel |
Stainless Steel |
Stainless Steel |
| All other internal parts |
Stainless Steel |
Stainless Steel |
Stainless Steel |
| Materials of Construction (Non-Wetted Components) |
| |
Aluminum |
Brass |
Stainless Steel |
| Enclosure & Cover |
Aluminum |
Aluminum |
Aluminum |
| Seals |
Buna-N |
Buna-N |
Buna-N |
| Window |
Pyrex |
Pyrex |
Pyrex |
| Din connector |
Polyamide |
Polyamide |
Polyamide |
| Performance |
| Measuring accuracy |
±2.5% of full-scale in the center third of the measuring range; ±4% in upper and lower thirds |
| Repeatability |
±1% of full-scale |
| Flow measuring range |
0.05-150 GPM (0.2-560 LPM); 1.5-1300, SCFM (0.75-610 SLPS) |
| Maximum operating pressure |
aluminum and brass meters: 3500 PSIG (240 Bar)
stainless steel meters: 6000 PSIG (410 Bar) |
| Maximum operating temperature |
media: 240°F (116°C), ambient: 180°F (82°C) |
| Standard calibration fluids |
Oil meters: DTE 25® @ 110°F (43°C), 0.873 sg
Water metes: tap water @ 70°F (21°C), 1.0 sg
Air meters: air @ 70°F (21°C), 1.0 sg and 100 PSIG (6.8 Bar) |
| Enclosure |
NEMA type 4X (UL Approved) |
| Alarm switch dead-band |
4% of full scale |
| Alarm switch contacts |
SPDT (dry contact), UL/CSA rating: 10 amps and 1/4 hp, 125 or 250 VAC. 1/2 amp, 125 VDC; 1/4 amp, 250 VDC; 3 amps, 125 VAC “L” (lamp load) |
| Filtration requirements |
74 micron filter or 200 mesh screen minimum |
| Mechanical size code |
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| DIM |
Series 3 |
Series 4 |
Series 5 |
Series 5 |
| A |
6-9/16"
(167mm) |
7-5/32"
(182mm) |
10-1/8"
(258mm) |
12-5/8"
(322mm) |
| B |
2-3/16"
(56mm) |
2-15/16"
(75mm) |
3-13/16"
(97mm) |
3-13/16"
(97mm) |
| C |
4"
(101mm) |
4-1/2"
(114mm) |
5-5/16"
(135mm) |
5-5/16"
(135mm) |
| D |
1-7/8"
(47mm) |
1-7/8"
(47mm) |
1-7/8"
(47mm) |
1-7/8"
(47mm) |
| E |
4-7/8"
(128mm) |
5"
(127mm) |
6-3/4"
(172mm) |
6-3/4"
(172mm) |
| F |
2-1/4"
(57mm) |
2-7/8"
(73mm) |
3-3/4"
(95mm) |
3-3/4"
(95mm) |
| Port Size |
NPTF: 1/4", 3/8", 1/2"
SAE: #6, #8, #10
BSP: 3/8", 1/2" |
NPTF: 3/4", 1"
SAE: #12, #16,
BSP: 3/4", 1" |
NPTF: 1-1/4", 1-1/2"
SAE: #20, #24
BSP: 1-1/4", 1-1/2" |
NPTF: 2"
SAE: #32
BSP: 2" |
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| PDF files contain much more in-depth information about this product |
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