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Blogs
Cutthroat Flume Blogs
A collection of blogs on the proper selection, application, and use of Cutthroat Flumes.
The blogs cover a range of Cutthroat Flume topics, including:
- Standard sizes
- Developing intermediate sizes
- Free flow equations
- Submerged flow corrections
- End connections and transitions
- Corrections for settling
- Integration into Packaged Metering Manholes
- and more...
Extended Height Flumes for Additional Flow Capacity
Do you need more flow capacity than a given flume will handle but are tight on space? If so, one option might be to look at using an EXTENDED HEIGHT flume.
Calibrating Parshall Flumes
One of the advantages of using a device like a Parshall Flume is that, properly installed and applied, there is NO NEED TO CALIBRATE THE FLUME!
Montana Flume: What's In a Name?
One of the more misunderstood flumes used to measure open channel flow is the Montana (Short Parshall) flume…but it doesn’t have to be! The Montana flume is a modification to the Parshall flume where both the throat and discharge sections have been removed…
Hawaiian Parshall Flumes
Using Parshall Flumes in Hawaii Openchannelflow offers a range of Parshall Flumes for a variety of flow measurement applications in Hawaii. The primary use of Parshall Flumes in Hawaii is to measure sanitary / wastewater flows, but the flumes are also used to measure industrial…
Anatomy of A Flume
While it is important to understand the various sections of a flume (converging / throat / diverging) and their associated functions in proper flow measurement, from a practical standpoint it is also important to be able to identify the functional elements of a flume and the…
The Heady Problem of Foam (in Flumes and Weirs)
Foam in flumes or weirs is a headache. Its a source of measurement error. Frequently it requires maintenance and monitoring of a flow measurement site. Generally it's a pain in the neck.
Parshall Flumes at Wastewater Treatment Plants
Parshall Flumes at Wastewater Treatment Plants Over the years, Parshall Flumes have become common sights at wastewater treatment plants (WWTPs) across the US. The flumes can be found at a number of points throughout the plant. Headworks Many plants rely on Parshall Flumes to…
Raising Parshall Flumes to Overcome Poor Entrance Conditions
In space constrained applications it can be difficult to get the upstream conditions necessary for accurate flow measurement with a Parshall flume. While flow conditioners - usually perforated plates or stainless steel fingers - can be used in some installations, they aren't…
Pipe Slope and Flume Operation
When using a flume to measure pipe flow, the incoming pipe slope is a critical factor. Too great a slope and the flow into the flume will be too energetic and the flume won't produce accurate results. How a Flume Operates A flume operates by accelerating slow, subcritical flow to…
Installing a Domed Top Packaged Metering Manhole
Fiberglass Flow Metering Manholes from Openchannelflow are a great solution to the problem of needing to measuring below ground flows. The manholes are light weight, corrosion resistant, watertight, and come with flume, weir, or mag meter already factory integrated. The…
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