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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
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Component
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Aluminum
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Brass
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Stainless Steel
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High-pressure casing, end ports and tapered shaft
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Aluminum
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Brass
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Stainless Steel
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Seals
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Buna-N (STD), EPR and Viton® or Kalrez®
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Buna-N (STD), EPR and Viton® or Kalrez®
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Viton® with Teflon® backup, Buna-N, EPR or Kalrez®
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Transfer Magnet
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Teflon® coated Alnico
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Teflon® coated Alnico
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Teflon® coated Alnico
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Floating Orifice Disk
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Stainless Steel
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Stainless Steel
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Stainless Steel
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All other internal parts
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Stainless Steel
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Stainless Steel
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Stainless Steel
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MATERIALS OF CONSTRUCTION:
Non-Wetted Components
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Component
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Aluminum
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Brass
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Steel
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Window Tube
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Polycarbonate (STD), Pyrex
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Polycarbonate (STD), Pyrex
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Polycarbonate (STD), Pyrex
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Window Seals
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Rubber (STD), Teflon®
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Rubber (STD), Teflon®
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Rubber (STD), Teflon®
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Teflon, Viton and Kalrez are registered trademarks of duPont de Nemours & Co.
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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:
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DIM
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Series 3
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Series 4
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Series 5
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Series 5
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A
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1-7/8"
(48mm)
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2-3/8"
(60mm)
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3-1/2"
(90mm)
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3-1/2"
(90mm)
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B
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6-9/16"
(167mm)
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7-5/32"
(182mm)
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10-1/8"
(258mm)
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12-5/8"
(322mm)
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Port Sizes
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NPTF:1/4",3/8",1/2"
SAE:#6,#8,#10
BSP:3/8",1/2"
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NPTF:3/4",1"
SAE:#12,#16
BSP:3/4",1"
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NPTF:1-1/4",1-1/2"
SAE:#20, #24
BSP:1-1/4", 1-1/2"
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NPTF:2"
SAE:#32
BSP:2"
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PRESSURE DIFFERENTIAL VS FLOW RATE:
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