Parshall Flumes

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Parshall Flumes 2017-11-16T12:41:33+00:00

Project Description

Parshall Flumes
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Parshall Flumes

Used in monitoring sewage, plant effluent, storm water and irrigation water the Parshall flume is still the best known and most widely used for permanent installations. It is available in throat sizes from 1 inch to 12 feet. Parshall flumes are available with numerous accessories and adaptations to match your flow and installation requirements. Made of fiberglass reinforced polyester (FRP) Plasti-Fab Parshall flumes offer optimum corrosion resistance and are the industry leader in measuring flow. For extremely severe industrial effluents they are also available in Vinyl Ester, stainless steel or other special materials as needed.

Parshall flumes solve a broad range of flow and installation problems:

  • Permanent installation in concrete or earthen channels
  • “Montana” or short section flumes for certain space critical locations
  • Free standing flumes with Wing Wall or End Adapters
  • Ha Head Gage – permanently molded into the side of the flume ensures a smooth sidewall
  • Nested Flumes for planned future expansion or downsizing due to water conservation
  • End Adapters for Piped Installation – From 1″ to 36″ throat size
  • Packaged Metering Manholes for below grade installation – From 1″ to 36″ throat
  • “Magic Bottom” to cure Submergence or Leveling problems
  • Tranquilizer Racks or Energy Absorbing units to reduce turbulence or velocity
  •  Additional customization options:
  • Threaded Taps
  • Permanent Cross Ties
  • Caulking Collars
  • Slip Flanges with 150 lb. bolting connections
  • Neoprene Boots with Stainless Steel Bands
  • Head Gages in MGD, GPM, CFS, Etc.
  • Capacitance Probe Side Cavity with Stainless Steel Ground Plate
  • Top Grating
  • Sectioning for undersized openings
  • Nesting smaller flume
  • Two Vial Bubble Level
  • Tranquilizing Racks
  • Energy Absorbing Basins
  • Many specially engineered solutions available, such as integration into Packaged Metering Manholes –consult representative or factory

Two Pipe Stubs

Features

  • Neoprene Boots and Bands
  • Inlet and Outlet Adapter
Sample Drawing

Magic Bottom

Features

  • Correct flumes that are out of level
  • Condition incoming high velocity
  • False floor that can be retrofitted into existing parshall flumes.

Parshall Flume

Features

  • Wide Flow Range
  • Dimensionally Stable
  • Maintenance Free
Sample Drawing

Single Pipe Stub

Features

  • Neoprene Boots and Bands
  • Inlet or Outlet Adapter
  • Custom Solutions
Parshall Flume Other Accessories

Other Accessories

Features

  • Ultrasonic mounting Bracket
  • Bubble pipe with Cavity
  • Sample pipe with Cavity
  • Stilling Well
Sample Drawing
Throat Size Flow Range – GPM Equation  Q = CFS   (H = Head in Feet)
1″ * 2 – 90 Q = .338 H 1.55
2 ” * 5 – 175 Q = .676 H 1.55
3 “ 15 – 830 Q = .992 H 1.547
6 “ 25 – 1,750 Q = 2.06 H 1.58
9 “ 45 – 3,900 Q = 3.07 H 1.53
12 “ 160 – 7,200 Q = 4.0 H 1.522
18 “ 230 – 11,000 Q = 6.0 H 1.538
24 “ 295 – 14,800 Q = 8.0 H 1.55
30 “ 365 – 18,700 Q = 10.0 H 1.559
36 “ 435 – 22,600 Q = 12.0 H 1.566
42 “ 565 – 30,490 Q = 16.0 H1.578
60 “ 700 – 38,420 Q = 20. H1.587
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