Palmer-Bowlus
The Palmer-Bowlus flume
takes its name from its inventors, Harold Palmer and Fred Bowlus. The
flume was developed for the Los Angeles County Sanitation Department in
the mid-1930’s. The flume was specifically designed to be a simple and
effective wastewater flow-measuring device. The flume is essentially a
restriction in the channel and is sized according to the width of the
flume (typically, but not always, the width of the pipe it is connected to).
Palmer-Bowlus flumes
are available from TRACOM in three different styles:
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4D+1”
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Permanent Style
- 2” top and end flanges
- Integral approach
section
- Point of measurement
inside of flume
- Available with inlet and
outlet end bulkheads to connect to existing pipe
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6” 4D+1” Style with
Stainless Steel
Ultrasonic Mounting Bracket
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2D+1”
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Portable
Style
- 2” top and end flanges
- Shorter lay length than
4D+1” style
- Point of measurement
upstream (outside) of flume
- Cannot be provided with
bubble or sample tubes, submerged probe or Drexelbrook cavities,
or staff gauges
- Available with outlet
bulkhead to connect to existing pipe
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4” 4D+1” Style (top)
4” 2D+1” Style (bottom) Comparison
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Insert
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Insert
Style
- 2D+1” length
- No top or end flanges
- No support ribs
- Intended
to install into the lower half of an existing pipe
- Point of measurement
upstream (outside) of flume
- Cannot be provided with
bubble or sample tubes, submerged probe or Drexelbrook cavities,
or staff gauges
- Not available with inlet
or outlet bulkheads
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6”, 8”, and 10” Insert
Flumes
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For new construction
the 4D+1” style is preferable due to the integral approach section. The 2D+1” style is more common in retrofit
constructions where space is a concern, although problems can occur in
that the head measurement is made upstream from the flume itself.
Unlike the 4D+1” and
2D+1” styles, the Insert style does not have inlet or outlet flanges and
is intended to fit into existing pipe.
Options and
Accessories
- Ultrasonic mounting
brackets
- Bubble tubes
- Sample tubes
- Submerged probe cavities
- Stilling wells (attached
and detached)
- Staff gauges
- Removable probe
holders
- Inlet and outlet
bulkheads
- Pipe stubs
- Flanged end connections
- FRP grating
- Riser boxes
- Transition entrances
- Nesting
- Multi-piece construction
- Chemically resistant gel
coat
Listed below are
various Palmer-Bowlus flume sizes and their recommended flow ranges.
Specifications -
Installation
Instructions - Typical Drawing
If you would like additional information, pricing, or
assistance in sizing and specifying a flume, please fill out and submit our flume application form.
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