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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
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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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#304 Stainless Steel
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Seals
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Buna-N (STD), EPR, Viton® or Kalrez®
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Buna-N (STD), EPR, Viton® or Kalrez®
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Viton® with Teflon® backup (STD), 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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Stainless 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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Buna-N (STD), Teflon®
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Buna-N (STD), Teflon®
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Buna-N (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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Measuring Accuracy:
±2.5% of ful
l-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) S
tainless 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
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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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