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Parshall Flumes
For Permanent Flow Monitoring Installations
Parshall flumes are the most widely used type of flume in the industry. Developed in 1922 by Ralph L Parshall, the Parshall flume was designed for the United States Bureau of Reclamation. Then it was used for permanent flow monitoring installations. Today, it does the same, however includes many options and accessories and is used for many reasons.
Parshall Flume Options & Accessories
TRACOM has worked with various wastewater management companies across the world for over 30 years. We understand that each system is different and needs various items to run most efficiently. This is why we provide a long list of options and accessories for Parshall flumes. Contact a specialist today to see which options work best for your company’s needs!
- Ultrasonic mounting brackets
- Bubble tubes
- Sample tubes
- Submerged probe cavities
- Stilling wells (attached and detached)
- Staff gauges
- Removable probe holders
- Inlet and outlet end adapters
- Pipe stubs
Flanged end connections - Flow straighteners
- Fiberglass grating
- Inlet and outlet wingwalls
- Multi-piece construction
- Nesting
- Chemically resistant gel coal
Parshall Flume Benefits
Because of their many benefits, Parshall flumes are used in a wide variety of applications. These flumes are often the first choice of many engineers and end-users, due to their certain abilities including:
- Wide Flow Ranges
- Resistance to Submersion
- Simple Flow Meter Calibration
- Self-Cleaning Design
Parshall Flume Applications
Parshall flume sizes range from 1” to 144” and can also be custom sized. They are an accurate and economical way for permanent flow monitoring. Over the years, TRACOM has helped wastewater management organizations use Parshall flumes in a variety of ways, such as:
- Sewage Treatment Plant Influent and Effluent
- Industrial Process Discharge
- Irrigation and Agricultural Runoff
- Dam Seepage
- Watershed Monitoring
Additional Examples
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Parshall Flume FAQ's
What is the difference between a Montana and a Parshall flume?
A Montana flume is essentially a shortened Parshall flume. It removes the throat and discharge section of the Parshall, allowing the same measurement options as a Parshall, at more than half the length. The downside is that a free-flow drop is recommended, as pipe stubs cannot be installed onto a Montana.
What size Parshall flumes does Tracom sell?
Tracom sells Parshall flumes. We make 1″, 2″, 3″, 6″, 9″, 12″, 18″, 24″, 30″, 36″, 48″, 60″, 72″, 84″, 96″, 120″, and 144″ sizes. The Parhsall flume size refers to the width of the flume at the throat section.
Technical Details
Product Data Sheet
Installation Instructions
Specifications
Flume sizes and their recommended flow ranges
| Size & Style | Recommended Flow Rates |
|---|---|
| 1” | 2 – 85 GPM |
| 2” | 3 – 210 GPM |
| 3” | 4 – 834 GPM |
| 6” | 22 – 1,754 GPM |
| 9” | 40 – 3,979 GPM |
| 12” | 146 – 7,336 GPM |
| 18” | 227 – 11,021 GPM |
| 24” | 296 – 14,853 GPM |
| 30” | 366 – 18,721 GPM |
| 36” | 434 – 22,618 GPM |
| 48” | 567 – 30,484 GPM |
| 60” | 995 – 38,426 GPM |
| 72” | 1,181 – 46,431 GPM |
| 84” | 1,828 – 54,489 GPM |
| 96” | 2,076 – 62,591 GPM |
| 120” | 2,575 – 162,414 GPM |
| 144” | 3,057 – 275,541 GPM |
| Note: 1” and 2” Parshall flumes are not recommended for sanitary flows | |
Discharge Tables
Drawings
- 1 inch Parshall with 4 inch stubs
- 1 inch Parshall
- 2 inch Parshall with 4 inch stubs
- 2 inch Parshall with 6 inch stubs
- 2 inch Parshall with 8 inch stubs
- 2 inch Parshall
- 3 inch Parshall with 6 inch stubs
- 3 inch Parshall with 8 inch stubs
- 3 inch Parshall with 10 inch stubs
- 3 inch Parshall
- 6 inch Parshall with 8 inch stubs
- 6 inch Parshall with 12 inch stubs
- 6 inch Parshall with 15 inch stubs
- 6 inch Parshall with 18 inch stubs
- 6 inch Parshall with nested 2 inch Parshall
- 6 inch Parshall with nested 3 inch Parshall
- 6 inch Parshall
- 9 inch Parshall nested in 48 inch Parshall
- 9 inch Parshall with 12 inch stubs
- 9 inch Parshall with 18 inch stubs
- 9 inch Parshall with 24 inch stubs
- 9 inch Parshall with nested 3 inch Parshall
- 9 inch Parshall
- 12 inch Parshall with 18 inch stubs
- 12 inch Parshall with 30 inch stubs
- 12 inch Parshall with nested 3 inch Parshall
- 12 inch Parshall with nested 6 inch Parshall
- 12 inch Parshall with nested 9 inch Parshall
- 12 inch Parshall
- 18 inch Parshall with 36 inch stubs
- 18 inch Parshall with nested 9 inch Parshall
- 18 inch Parshall
- 24 inch Parshall with 36 inch stubs
- 24 inch Parshall
- 30 inch Parshall
- 36 inch Parshall
- 48 inch Parshall
- 60 inch Parshall
- 72 inch Parshall
- 84 inch Parshall
- 96 inch Parshall
- 144 inch Parshall
- Parshall Master Dimensions
- Parshall with End Adapters Master Dimensions
