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 Water Flow
Home : Our Principals : GLOBAL WATER : Water Flow

Flumes: Parshall, Palmer-Bowles, "H"

Primary Devices for Open Channel Flow Measurement

FEATURES:

  • The Palmer-Bowlus constricts the flow vertically and horizontally and can be molded to be inserted into an existing half-round pipe.
  • The Parshall flumes constrict primarily horizontally, and are design for rectangular or trapezoidal channels.
  • "H" flumes attach to the ends of pipes where the water is free-falling.

Product Description

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.

  • The Palmer-Bowlus constricts the flow vertically and horizontally and can be molded to be inserted into an existing half-round pipe. 
  • The Parshall flumes constrict primarily horizontally, and are design for rectangular or trapezoidal channels. 
  • H flumes attach to the ends of pipes where the water is free-falling. 

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.

Options

Palmer-Bowlus Flume
U shaped channel flume specifically designed for monitoring flows in pipes.
Parshall flume
Industry standard rectangular flume used to monitor streams and channels.
H flume
Used to monitor free fall outflow from pipes or channels when a Palmer-Bowlus or Parshall Flume will not work.
ACCESSORIES
Flume-SWP2 2" Stilling Well Port
All stilling well ports will be on the left hand side, facing down stream, unless otherwise specified.  A 2" stilling well is required for use with submersible sensor.
Flume-SW2 2" Stilling Well
2" Stilling Well for use with the 2" stilling well port.
Flume-SG Staff Gauge
All staff gauges will be in inches unless otherwise specified.
Flume-BT Bubbler Tube
1/4 inch OD stainless steel.
Flume-SW8 Attached 8" Stilling Well
All stilling wells will be on the left hand side, facing down stream, unless otherwise specified.
Flume-WW Wingwalls (pair)
45 degree angle flat wing walls.
Flume-CAC Concrete Anchor Clips
Charge is per clip, the number of clips varies with flume size.  Example Parshalls over 12 inch normally require 8 clips.
 Printable Version (View: 4199 | Print: 676)

Next:
F400 VARIABLE AREA FLOWMETERS
F450 VARIABLE AREA INLINE FLOWMETERS
F460 INLINE FLOW METERS
F550 PANEL MOUNT FLOWMETERS
RF SERIES RAMP FLUMES

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Sentra Niaga Puri Indah Blok T3-10
Jakarta 11610 - Indonesia
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