| VISI-RATE Low Cost In-Line Flow Meter |
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Choice of Two Materials of Construction: Select from brass or stainless steel to meet system and liquid requirements. |
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Unrestricted Mounting: Allows the designer to install the monitor in any direction - horizontal, vertical or inverted. Two scale positions available for scale reading ease. |
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Compact and Rugged Design: Measures less than 5" long and 1-1/2" diameter with a tough polysulphone body of construction. |
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Visual Inspection of Fluid: The transparent body allows for visual inspection of fluid conditions. Diagnose problems at a glance. |
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Patented Sensing Method Assures Accuracy: The Helical-Torque sensing method assures accuracy of better than 95% of actual flow rates, even with variable fluid parameters. |
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Superior Readability: Extra long 3-1/2" scale provides excellent flow rate measuring resolution along with dual units of GPM and LPM. |
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Fourteen Port Sizes Available: Standard selection of NPT, SAE and BSP ports reduces the amount of adapters required for installation. |
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Low Cost Precision: Measuring accuracy of ±5% and repeatability of ±1%. |
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| ENGINEERING SPECIFICATIONS: The Visi-Rate meter shall:
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Use the mass axial turbine rotation to measure flow rate |
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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 ±5% of full scale with ±1% repeatability |
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Use the helical-torque sensing method to measure flow |
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Be Lake Monitor No. VRB-_ _-_ _ for flow measuring or for a flow indicator be a VRI-_ _ |
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MATERIALS OF CONSTRUCTION: Wetted Components
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Component |
Brass |
Stainless Steel |
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End ports |
Brass |
Stainless Steel |
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Seals |
Buna-N |
Viton® |
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Spring (VRB Series) |
Stainless Steel |
Stainless Steel |
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Turbine and Casing |
Polysulphone |
Polysulphone |
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PERFORMANCE:
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Measuring Accuracy: ±5% of full scale |
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Repeatability: ±1% of full scale |
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Flow Measuring Range (VRB flow meters): 1-30 GPM [5-110 LPM] |
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Minimum Flow Detection (VRI flow indicators): 0.2 GPM [0.8 LPM] |
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Maximum Operating Temperature: 250ºF [121ºC] |
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Maximum Operating Pressure: 200 PSIG [14 bar] |
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Pressure Differential: See graphs below. |
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Filtration Requirements: 37 micron (400 U.S. mesh) minimum |
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| MECHANICAL: |
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DIM |
1/4" - 1/2" SIZES |
3/4" - 1" SIZES |
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A |
1-3/4" (45 mm) |
1-3/4" (45 mm) |
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B |
3/4" (87 mm) |
5-3/8" (137 mm) |
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Port Sizes |
NPTF: 1/4", 3/8", 1/2"
SAE: #6, #8, #10
BSPP: 3/8", 1/2" |
NPTF: 3/4", 1"
SAE: #12, #16
BSPP: 3/4", 1" |
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| PRESSURE DIFFERENTIAL VS FLOW RATE: |
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