PALMER BOWLUS FLUMES
Diagrams & Dimensions

palmer bowlus flume
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The Palmer Bowlus metering flume has been widely used since 1937 for measuring water and wastewater in open channels or pipelines that are not under pressure.  Some of the Palmer Bowlus’ most important characteristics include measurement accuracy, low head loss, minimum flow restriction and ease of installation in pipelines.  The Palmer Bowlus flumes are normally installed in a “U” shaped channel fed by a pipeline such as storm drains and sewers.  This convenient flume requires little redesign or special modification of circular conduits for installation.  The Palmer Bowlus flumes in channel liner are provided in a one piece 4 x D (diameter) configuration in sizes up to 15 inches in diameter.  For more information on monitoring Palmer Bowlus flumes see the FC200, Open Channel Flow Monitor.  For information on how to install a Palmer Bowlus Flume click HERE.

Accuracy:
The accuracy of the Palmer Bowlus flumes is comparable to that of Parshall or other types of Venturi flumes.  Research indicates that within the normal range of flows (from under 10% to 90% of flume capacity), measured flow rate is usually within + 3% of theoretical flow rate.

Table of Dimensions
Flume Size "D" D/2< "L" (2D) 4D H Sill Height D/6 Max Head (Ft.) Price
4 2 8 16 6 0.67 0.29 $402
6 3 12 24 8 1.0 0.39 $505
8 4 16 32 10 1.33 0.51 $660
10 5 20 40 12 1.67 0.69 $720
12 6 24 48 14 2.0 0.79 $740
15 7.5 30 60 17 2.5 0.96 $1055
(All dimensions in inches unless otherwise indicated.)

Table of Flow Data
Size 4" 6" 8" 10" 12" 15"
Max MGD 0.104 0.210 0.459 0.931 1.344 2.209
Max GPM 72.1 145.6 318.9 646.8 933.2 1534
Max CFS 0.161 0.324 0.711 1.441 2.079 3.418
Complete Flow Table
NOTE: Tables are only valid to the
Max Head height of the Palmer Bowlus flume. 		4" Table 6" Table 8" Table 10" Table 12" Table 15" Table

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