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Category - Flumes
Blog
Fiberglass Grating Covers for Flumes
When installed in manholes or potential pedestrian traffic areas, flow monitoring flumes can be a hazard. A typical flume installation represents an open trough that that an operator can inadvertently step or fall into. On large flumes with large pipe stubs, the danger can…
Measuring Pipe Flows with Cutthroat Flumes
Like many flumes, the Cutthroat flume was originally conceived to measure agricultural / irrigation flows. Over time, however, the Cutthroat flume has been adapted to measure open channel pipe flows. Specially shaped transitions (end adapters) allow the Cutthroat…
Measuring Watersheds with H Flumes
A watershed is an area of land that feeds all surface and ground water into a single body of water (stream, river, lake, etc.). Watersheds can combine to form progressively large watershed networks that drain into progressively larger bodies of water. Watersheds are…
Where to Measure Flow in a Parshall Flume
One of the problems that we see again and again is confusion as to where the flow should be measured in a Parshall flume. We've seen flow measured: In the throat In the converging section (random location) In the converging section at a distance 2/3 the length of the…
Turbulent Flow and Parshall Flumes
One of the requirements of accurate flow measurement with a Parshall flume is a tranquil flow approaching the flume. Poorly balanced, surging, or turbulent flows will adversly affect the systems accuracy for both instantaneous and totalized flow.
Flow Conditioners for Flumes
Many times flumes have to be installed in applications where the flow cannot be properly conditioned before it enters the flume. For those applications, Openchannelflow offers Energy Absorbers and Tranquilizing Racks to helps dampen and condition the flow entering the…
Insulated Flume Covers
Insulated flume covers from Openchannelflow can help to provide better flow data during cold weather periods by eliminating frost / ice build up on the flow meter sensor as well as insulate the space above the flume. When used in conjunction with a strip, pipe, or immersion…
Parshall Flumes and ASTM D1941 & ISO 9826
Above Ground Flume Enclosures
To protect flumes in above ground applications, Openchannelflow has developed a range of fiberglass enclosures that factory integrate small flow measuring flumes. Enclosure integration: Safeguards the installation - restricting access to the flume and flow meter Reduces the…
Water Conservation and Nested Parshall Flumes
One of the nice things about the Parshall flume is that it lends itself well to flows that shift dramatically over the life of the flume. In applications where water conservation has occurred and the flows that a Parshall flume was designed are no longer occurring, a…
Measuring Pipe Flows with Trapezoidal Flumes
Originally developed to provide both low-end sensitivity and wide flow, Trapezoidal flumes have expanded beyond the agricultural applications they were designed to measure a wide range of pipe flows. Trapezoidal flumes can be found on pipes measuring: Dam…
Advantages of Parshall Flumes
Used to measure municpal sewage, industrial effluent, dam seepage, storm water, and irrigation / agricultural flows, the Parshall flume is the best known and most widely used primary device monitoring water in open channels and non-full pipes. Parshall flumes offer a number of…
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