PARSHALL, PALMER BOWLUS, AND "H" FLUMES
Primary
Devices for Open Channel Flow Measurement
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FEATURES:
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The Palmer-Bowlus constricts the flow vertically and
horizontally and can be molded to be inserted into
an existing half-round pipe.
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The Parshall flumes constrict primarily
horizontally, and are design for rectangular or
trapezoidal channels.
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"H" flumes attach to the ends of pipes where the
water is free-falling.
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On this page:
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Additional Information:
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Global Water offers water flumes constructed of high
quality polyester resin and fiberglass. These flumes
are durable, highly accurate, and easy to install.
Global water offers primary device flumes that
constrict an open channel's flow either horizontally
or vertically or both. Once the flume flow is backed
up behind the constriction, there is a defined
relationship between the upstream water level and the
open-channel flow through the constriction. This
relationship can be determined either by an equation
or a look-up table.
Global Water offers three standard molded flumes: the
Palmer-Bowlus Flumes, the Parshall Flumes, and the H
Flumes.
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The Palmer-Bowlus constricts the flow vertically and
horizontally and can be molded to be inserted into
an existing half-round pipe. Click HERE for
Diagrams and Palmer Bowlus flume table of
Dimensions.
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The Parshall flumes constrict primarily
horizontally, and are design for rectangular or
trapezoidal channels. Click HERE for
Diagrams and Parshall flume table of Dimensions/Flow
Data.
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H
flumes attach to the ends of pipes where the water
is free-falling. Click HERE for Diagrams and
H-flume table of Dimensions.
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Installation
For a flume to work properly, there must be freely
flowing water out of the flume. The flow cannot be
backed up downstream or the reading will be erroneous
and misleading. Make sure that you have free-flowing
water without major inflows downstream of the flume.
The open channel flow measurement can be made by using
a float in an adjacent stilling well, a
pressure
transducer, or by an ultrasonic sensor.
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Contact us
directly to obtain a quote for the following flumes:
Palmer-Bowlus Flume
U shaped channel flume specifically designed for
monitoring flows in pipes.
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$Varies
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Parshall
flume
Industry standard rectangular flume used to
monitor streams and channels.
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$Varies
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H flume
Used to monitor free fall outflow from pipes or
channels when a Palmer-Bowlus or Parshall Flume
will not work.
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$Varies
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ACCESSORIES |
Attached 8" Stilling Well
All stilling wells will be on the left hand side,
facing down stream, unless otherwise specified. |
$845 |
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2" Stilling Well
All stilling well ports will be on the left hand
side, facing down stream, unless otherwise
specified. |
$85 |
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Staff Gauge
All staff gauges will be in inches unless
otherwise specified. |
$121 |
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Bubbler Tube
1/4 inch OD stainless steel. |
$99 |
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Wingwalls (pair)
45 degree angle flat wing walls. |
$675 |
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Concrete Anchor Clips
Charge is per clip, the number of clips varies
with flume size. Example Parshalls over 12 inch
normally require 8 clips. |
$20 |
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RELATED PRODUCTS
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FC200 Open Channel Flow Monitor
Monitor and display total and current flow,
datalogging options available.
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$1425
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WL15X Water Level Logger
Record water level and using a depth to flow table
convert the data into flow data.
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$795
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FP101 Flow Probe
Water velocity probe for determining open channel
flow. |
$695 |
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