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 Variable Area Flowmeters
Swagelok® variable area flowmeters measure the flow rate of liquids and gases by means of a tapered tube and float. The float is pushed up by increasing fluid flow and pulled down by gravity as fluid flow decreases.
Features
- Simple installation
- Easy to read
- No wearing parts
- Limit switches available
- 10-to-1 turndown ratio (the lowest measurement is one tenth of the full-scale reading); measurement ranges are available in U.S. customary and metric scales.
- Meters are marked with the fluid media and unit of measure for which they are calibrated.
- Meters can be factory calibrated to customer process specifications.
More Information
Download the Variable Area Flowmeters—G Series and M Series catalog.
Download the Variable Area Flowmeters Installation Instructions.
Find variable area flowmeters in the product search.
G Series Variable Area Flowmeters (G1, G2, G3, G4, GM, and GP Models)
Swagelok G series models contain glass measuring tubes, which allow direct viewing of the process fluid and direct reading of the flow.
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Specifications
Measured Flow Ranges
• Air
• Water
Temperature
• Process
• Ambient
Maximum Inlet Pressure
Process Connections
Accuracy Class |
0.018 to 0.18 through 18 to 180 std ft³/h; 0.5 to 5.0 through 500 to 5000 std L/h
0.065 to 0.65 through 4.2 to 42 U.S. gal/h; 0.25 to 2.5 through 16 to 160 L/h
23 to 212°F (–5 to 100°C)
–4 to 212°F (–20 to 100°C)
Up to 145 psig (10 bar)
1/4 in. NPT; G 1/8 (ISO 228); G 1/4 (ISO 228)
1.0, 2.5, 4.0 |
M Series Variable Area Flowmeters (M1, M2, M3, and MH Models)
Swagelok M series models contain metal measuring tubes, which are used for difficult operating conditions where pressure, temperature, or both are factors. Because direct readings are not possible with metal tubes, these flowmeters are equipped with mechanical or electronic displays.
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Specifications
Measured Flow Ranges
• Air
• Water
Temperature
• Process
• Ambient
Maximum Inlet Pressure
Process Connections
Accuracy Class |
0.18 to 1.8 through 670 to 6700 std ft³/h; 5.0 to 50 through 18 000 to 180 000 std L/h
0.08 to 0.8 through 270 to 2700 U.S. gal/h; 0.3 to 3.0 through 1000 to 10 000 L/h
M1, M2: –40 to 302°F (–40 to 150°C)
M3, MH: –325 to 572°F (–200 to 300°C)
M1, M2: –4 to 158°F (–20 to 70°C)
M3, MH: –40 to 248°F (–40 to 120°C)
Up to 2888 psig (199 bar)
1/2 to 1 1/4 in. NPT;
1/2 to 1 in. ASME flange
1.6, 2.5, 4.0 |
Calibration and Testing
Every Swagelok variable area flowmeter is factory calibrated to the selected media, flow range, and accuracy class using clean, dry air for air flow range models and water for water range models. Meters can be calibrated to user-specific applications.
Cleaning and Packaging
All Swagelok variable area flowmeters are cleaned to remove dirt, debris, and burrs and are individually boxed. Oil- and grease-free cleaning are available on request.
Installation
Variable area flowmeters must be oriented vertically, except for the MH model, which is mounted horizontally. For complete installation information, see the Swagelok Variable Area Flowmeters Installation Instructions, G Series and M Series.
Options
- Electrical options
- Limit switches
- Output signal
- Junction boxes
- Optional conduit and cable glands
- Integral metering valve mounted on outlet
- Certificates and test reports
- Damping device
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