Fibreglass Parshall Flumes and Options


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Product Description:
Since 1922, the Parshall Flume has been the most widely used type of flume for fixed flow monitoring installations. A special shaped open channel flow section can be installed in a ditch or canal to measure the flow rate.

Parshall Flumes are sized by throat width, and conform to standardized dimensions published in the U.S. Department of the Interior, Bureau of Reclamation.

Rather than try to make the flow application fit a particular type of flume, we carefully analyze the parameters so we can select an appropriate flume for the application. Options and modifications are available to ensure that the customer's requirements are fully met, and that additional instruments are easily interfaced with the flumes.

Untitled Document
Width
"W"
Ha
Head
Minimum Flow Rate
Ha
Head
Maximum Flow Rate
Inches
Feet
CFS
MGD
GPM
Feet
CFS
MGD
GPM
1
0.07
0.005
0.003
2.2
0.6
0.15
0.10
68.7
2
0.07
0.011
0.007
4.9
0.6
0.31
0.20
137
3
0.10
0.028
0.018
12.6
1.5
1.86
1.20
835
6
0.10
0.054
0.035
24.2
1.5
3.91
2.53
1750
9
0.10
0.091
0.059
40.8
2.0
8.87
5.73
3980
12
0.10
0.120
0.078
53.9
2.5
16.10
10.40
7220
18
0.10
0.174
0.112
78.1
2.5
24.60
15.90
11000
24
0.15
0.423
0.273
190.0
2.5
33.10
21.40
14900
36
0.15
0.615
0.397
276.0
2.5
50.40
32.60
22600
48
0.20
1.260
0.816
565.0
2.5
67.90
43.90
30500
60
0.20
1.550
1.000
696.0
2.5
85.60
55.30
38400
72
0.25
2.630
1.700
1180.0
2.5
103.00
66.90
46200
96
0.25
3.450
2.230
1550.0
2.5
139.00
90.10
62400
120
0.30
5.740
3.710
2580.0
3.5
292.00
189.00
131000
144
0.33
7.930
5.130
3560.0
4.5
519.00
335.00
23300

Typical Options
  • Staff Gauge - available in various widths and markings including flow data
  • Stilling Well - Integral or remote, 6", 8", 10" or 12" ID, with or without plug
  • Bubbler Tube - Stainless steel, 1/4" ID, integral to flume
  • Sampler Tube - Stainless steel, 3/8" ID, integral to flume
  • Inlet and Outlet End COnnection - Integral or removable
  • Pipe Connection - Neoprene boot or ANSI pipe flange connection
  • Special Chemical Resistant Fabrication - pH range of 1 to 14
  • Ultrasonic Transducer Bracket - Fixed at 14" or 24" or adjustable
  • pH Sensor Cavity - Fabricated to fit most sensors
  • Wing Walls and Bulk Heads - Custom fabricated to meet job requirements
  • Nesting Options - Standard or special design
  • Energy Absorption Racks - Fixed or removable
  • Standard or Special Depths - Including surge boxes
  • Enclosed Flumes - For odor control
  • Flume Covers - Grating, fibre sheeting, clear polycarbonate
  • Montana Cut Design - Available in all standard sizes
  • Special Design - Will meet your special project needs