| Pneumatic In-Line Flow Rate Monitors
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Three Materials of Construction: Select from aluminum, brass or stainless steel |
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Rugged and Reliable: These monitors are constructed with all metal pressure vessels, allowing safe, permanent, installation in industrial systems. |
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Unrestricted Mounting: Allows the designer to install the monitor in any orientation; horizontal, vertical or inverted. |
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High Pressure Operation: The magnetically coupled follower allows operation to 1000 PSIG. |
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Superior Exterior Design: Can be used outdoors and on systems where wash downs are required. |
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Twenty-three Different Ports Available: Standard selection of NPT, SAE and BSP ports reduces the amount of adapters required for installation. |
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Multi-Use: Versatile monitors can be used to verify air compressor outputs and to test pneumatic machinery and tools for proper air consumption. |
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Low Cost Precision: Mid-scale measuring accuracy: within ±2.5%. Full-scale accuracy: within ±4%. |
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| ENGINEERING SPECIFICATIONS: The pneumatic 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 a Lake Monitors No. G_ _ - _ _ _ - _ _ |
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MATERIALS OF CONSTRUCTION: Wetted Components
| Component |
Aluminum |
Brass |
Stainless Steel |
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High-pressure casing, end ports and tapered shaft |
Aluminum |
Brass |
#304 Stainless Steel |
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Seals |
Buna-N (STD), EPR, Viton® or Kalrez® |
Buna-N (STD), EPR, Viton® or Kalrez® |
Viton® with Teflon® backup (STD), Buna-N, EPR or Kalrez® |
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Transfer Magnet |
Teflon® coated Alnico |
Teflon® coated Alnico |
Teflon® coated Alnico |
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Floating Orifice Disk |
Stainless Steel |
Stainless Steel |
Stainless Steel |
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All other internal parts |
Stainless Steel |
Stainless Steel |
Stainless Steel |
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| MATERIALS OF CONSTRUCTION: Non-Wetted Components
| Component |
Aluminum |
Brass |
Stainless Steel |
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Window Tube |
Polycarbonate (STD), Pyrex |
Polycarbonate (STD), Pyrex |
Polycarbonate (STD), Pyrex |
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Window Seals |
Buna-N (STD), Teflon® |
Buna-N (STD), Teflon® |
Buna-N (STD), Teflon® |
Teflon, Viton and Kalrez are registered trademarks of duPont de Nemours & Co. |
PERFORMANCE:
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Measuring Accuracy: ±2.5% of full-scale in the center third of the measuring range; ±4% of full-scale over the entire scale range. |
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Repeatability: ±1% of full-scale |
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Flow Measuring Range: 1.5-1300 SCFM(1-610 SLPH) |
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Maximum Operating Pressure: Aluminum and Brass monitors: 600 PSIG (40 Bar) Stainless Steel monitors: 1000 PSIG (70 Bar) |
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Maximum Operating Temperature: 240ºF (116ºC) Note: for operation to 600ºF (316ºC), see our High Temperature Data sheet. |
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Pressure Differential: See Graphs above. |
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Standard Calibration Fluids: Air @ 70ºF (21ºC), 1.0 sg and 100 PSIG (6.8 Bar) |
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| MECHANICAL: |
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DIM |
Series 3 |
Series 4 |
Series 5 |
Series 5 |
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A |
1-7/8"
(48mm) |
2-3/8"
(60mm) |
3-1/2"
(90mm) |
3-1/2"
(90mm)
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B |
6-9/16"
(167mm) |
7-5/32"
(182mm) |
10-1/8"
(258mm) |
12-5/8"
(322mm) |
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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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