Flowmetrics is a leading manufacturer of turbine,
rotameters, positive displacement flowmeters
and associated flow electronics suitable
for liquids and gases.
 
The variable area flowmeter or rotameter is a flow measuring device which
has been constructed to produce a differential pressure. The area of the flow
restriction is tapered to maintain constant differential pressure.  They are
made with a vertical tapered tube through which the fluid or gas moves in an
upward motion. A metering float, usually 316SS, is free to move within the
tube. At no flow conditions the float rests at the bottom of the tapered tube. As
fluid flow increases, the sum of the buoyancy force and the fluid force on the
float eventually exceeds the weight of float and the float rises. By graduating
the tube the float can be used to indicate flow level.

This is one of the simplest and most reliable methods of measuring flow.
The benefits are:

  • Economical: The least expensive method of measuring flow in pipes
    size 3 inches and under.
  • Ease of installation: Easily installed in any vertical section of pipe - no
    piping run requirements.
  • Simplifies maintenance: They include removable caps which provide
    easy access for cleaning the metering tube.

The rotameters are extensively used in the process control industry - to
measure flow of liquids, gases and vapors such as steam.
Flow meter sizes available - tube size
From 1/8 to 2 1/4 inches
Flow meter tube
Borosilicate glass
Floats
Standard - 316SS. Optional - Teflon, PVC,
Hastelloy C
End fittings
Standard - Carbon Steel or epoxy painted.
Optional - 316 SS, 304SS, brass, aluminum,
hastelloy C, PVC and solid teflon
"O" Rings
Buna, Viton, EPR or Teflon (as required by
process conditions)
Accuracy
up to ± 1% full scale possible
Repeatability
± 0.5% Full scale
Process connections
NPT, MS and vertical/horizontal flange
Operating temperature
up to 250°F
Leading Edge Management LLC
P.O. Box 207, Ellicott City, Maryland 21041
Phone: 410-747-1120; Fax: 410-747-1170; Email: info@leadingedgemgt.net
“Focused on improving your measuring”™
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