| In-Line Variable Area Flow Meters from Lake Monitors |
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Three Materials of Construction: Select from aluminum, brass or stainless steel. |
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Flexible Mounting Requirements: Allows the designer to mount the monitor in any orientation; horizontal, vertical or inverted. |
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Superior Exterior Design: Weather-tight for use outdoors and/or on systems where washdowns are required. |
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Reverse Flow Capability: An option not found in most rotameters and other variable area meters. |
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Good Viscosity Stability: A thin (0.03"), sharp-edged, orifice provides excellent stability of readings to a minimum of 500 SUS. |
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Rugged and Reliable: Designed as a hydraulic service tool, this monitor will provide years of maintenance free performance. |
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High Pressure Operation: The magnetically coupled follower allows operation to 6000 PSIG and use with opaque liquids. |
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Twenty-three Different Ports Available: Standard selection of NPT, SAE and BSP permits system design versatility. |
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Reverse Flow Capability: An option not found in most rotameters and other variable area meters. |
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| ENGINEERING SPECIFICATIONS: The in-line flow rate monitor shall:
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use the variable annular orifice technique with compression spring recovery. |
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not require inlet or outlet straight plumbing, or require vertical pipe mounting. |
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have a measuring accuracy of ±2.5% of full scale in the center third of the measuring range, and ±4% of full scale accuracy over the entire flow measuring range. |
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have a stainless steel sharp-edged orifice. |
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have a weather-tight external construction |
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be Lake Monitors No. B_ _ - _ _ _ - _ _ |
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MATERIALS OF CONSTRUCTION: Wetted Components
| Component |
Aluminum |
Brass |
Stainless Steel |
|
High-pressure casing, end ports and tapered shaft |
Aluminum |
Brass |
Stainless Steel |
|
Seals |
Buna-N (STD), EPR and Viton® or Kalrez® |
Buna-N (STD), EPR and Viton® or Kalrez® |
Viton® with Teflon® backup, Buna-N, EPR 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 |
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MATERIALS OF CONSTRUCTION: Non-Wetted Components
| Component |
Aluminum |
Brass |
Steel |
|
Window Tube |
Polycarbonate (STD), Pyrex |
Polycarbonate (STD), Pyrex |
Polycarbonate (STD), Pyrex |
|
Window Seals |
Rubber (STD), Teflon® |
Rubber (STD), Teflon® |
Rubber (STD), Teflon® |
Teflon, Viton and Kalrez are registered trademarks of duPont de Nemours & Co. |
PERFORMANCE:
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Accuracy: ±4% of full scale over full scale ±2.5% of full scale in the center 1/3 of scale |
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Repeatability: ±1% of full scale |
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Pressure Differential: < 30 PSIG, consult meter data sheets for exact specifications |
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Maximum Operating Temperature: Std: 240ºF (115ºC); Optional: 400ºF (204ºC) and 600ºF (315ºC) |
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Maximum Operating Pressure: Aluminum and Brass meters: 3500 PSIG (240 Bar) Stainless Steel meters: 6000 PSIG (410 Bar) |
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Flow Range: 0.5-150 GPM (0.2-560 LPM) |
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| MECHANICAL: 
|
|
DIM |
Series 3 |
Series 4 |
Series 5 |
Series 5 |
|
A |
1-7/8"
(48mm) |
2-3/8"
(60mm) |
3-1/2"
(90mm) |
3-1/2"
(90mm) |
|
B |
6-9/16"
(167mm) |
7-5/32"
(182mm) |
10-1/8"
(258mm) |
12-5/8"
(322mm) |
|
Port Sizes |
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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PRESSURE DIFFERENTIAL VS FLOW RATE:
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