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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
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Brass
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Stainless Steel
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End ports
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Brass
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Stainless Steel
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Seals
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Buna-N
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Viton®
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Spring (VRB Series)
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Stainless Steel
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Stainless Steel
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Turbine and Casing
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Polysulphone
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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:
S
ee 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
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1/4" - 1/2" SIZES
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3/4" - 1" SIZES
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A
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1-3/4" (45 mm)
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1-3/4" (45 mm)
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B
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3/4" (87 mm)
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5-3/8" (137 mm)
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Port Sizes
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NPTF: 1/4", 3/8", 1/2"
SAE: #6, #8, #10
BSPP: 3/8", 1/2"
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NPTF: 3/4", 1"
SAE: #12, #16
BSPP: 3/4", 1"
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PRESSURE DIFFERENTIAL VS FLOW RATE:
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