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VARIABLE AREA FLOW METERS

Variable area flow meters are simple and versatile devices that operate at a relatively constant pressure drop and measure the flow of liquids, gases, and steam. The position of their float, piston or vane is changed as the increasing flow rate opens a larger flow area to pass the flowing fluid. The position of the float, piston or vane provides a direct visual indication of flow rate. Design variations include the rotameter (a float in a tapered tube), orifice/rotameter combination (bypass rotameter), open-channel variable gate, tapered plug, and vane or piston designs.

Either the force of gravity or a spring is used to return the flow element to its resting position when the flow lessens. Gravity-operated meters (rotameters) must be installed in a vertical position, whereas spring operated ones can be mounted in any position. All variable area flow meters are available with local indicators. Most can also be provided with position sensors and transmitters (pneumatic, electronic, digital, or fiberoptic) for connecting to remote displays or controls.

 

FEATURED MANUFACTURER FOR VARIABLE AREA FLOW METERS

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From inline to low volume flow meters  Brooks offers high-performance gas and water flow measurement instruments for your application.

Key Applications

  • Basic liquid (including water) or gas flow measurement

  • Rotating equipment flow measurement

  • Process analyzers

  • High-pressure flow on offshore oil platforms

  • Chemical injection

  • Purge liquid or gas metering

 
 

MORE VARIABLE AREA FLOW METER MANUFACTURERS

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Offers wide selection of variable area flow meter and switches products

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Tapered bore in-line indicators for flow rate.

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Plastic variable area flow meters are radially-installed dis-mountable meters for measuring the rate of flow in industrial pipework applications