Loading... Please wait...
 

NEWSLETTER


To Ponder

    "There are only two ways to live your life: one is as though nothing is a miracle; the other is as though everything is a miracle."

    Albert Einstein

Flumes

  • Image 1
  • Image 2
  • Image 3
  • Image 4

Price:
Call for quote
SKU:
TRACOM - FRP Flumes
Brand:



Product Description

TRACOM offers seven type of flumes for open channel flow monitoring: Parshall, Palmer-Bowlus, H-Type, Trapezoidal, Cutthroat, RBC, and Montana.  Each flume has its own advantages and disadvantages and it is recommended that before selecting a flume that the characteristics of each flume be considered. Please share your specific application with us so we can make a proper recommendation and quotation.  

Level vs Flow comparison tables

Parshall / Palmer-Bowlus Flume Typical Discharge Capacities

Trapazoidal / HS / H/ HL / RBC Flume Typical Discharge Capacities

Weir & Flume Discharge Equations


Following are some highlights of the various flume choices:

Parshall

  • Most widely used type of flume for permanent installations
  • Standard design conforms to U.S. Department of the Interior, Bureau of Reclamation, Water Measurement Manual
  • Available in throat widths of 1” to 180”
  • Resistant to the effects of submergence
    • 50% for 1” - 3” flumes
    • 60% for 6” and 9” flumes
    • 70% for 12” - 96” flumes
    • 80% for 120” - 600” flumes
  • Self-cleaning in most circumstances (not recommend for sanitary use in 1” and 2” sizes)
  • Available in nested configurations
  • Available with end adapters to connect to existing pipe
  • Simple flow meter calibration
  • Maximum flow rates from 85.3 GPM – 467,200 GPM with standard wall heighths
  • Installation requires drop in conduit invert from inlet to outlet

 

Palmer-Bowlus

  • 4”-108” sizes available (sized by throat width)
  • Three primary styles:
    • 4D+1” (permanent style with integral approach section)
      Point of measurement inside of the flume
    • 2D+1” (short sectioned flume with only the trapezoidal ramp)
      Point of measurement upstream of the flume
    • Insert style (2D+1” length but no end flanges and O.D. of flume is I.D. of pipe)
      Potential problems with accuracy due to reduced flume width
  • Available with bulkheads to connect to existing pipe
    • 4D+1” – inlet and outlet
    • 2D+1” – outlet only
    • Insert style – N/A
  • No invert drop required
  • Easily installed in manholes or round bottom channel
  • Maximum flow rates from 55.2 GPM – 198,535 GPM
  • Proprietary design varies from manufacturer to manufacturer
  • Smaller useful range of flows
  • Sedimentation at lower flow velocities
  • Requires 25 straight run pipe diameters upstream

 

HS / H / HL-Type

  • Standard design conforms to U.S. Department of Agriculture, Field Manual for Research in Agricultural Hydrology
  • Available in a wide range of sizes from 0.4’ HS – 4.0’ HL
  • Developed for agricultural runoff
  • Approach section and inlet bulkhead available for connection to existing pipe
  • Simple flow meter calibration
  • Flat bottom for self-cleaning of small debris
  • Wide range of flows
  • Maximum flow rates from 36.0 GPM – 52,509.6 GPM
  • Discharge must be unimpeded or spill freely from flume
  • Cannot operate under submerged conditions
  • Require 3-5 times the maximum head in straight channel upstream of the flume

 

Trapezoidal

  • Initially designed to measure flows in irrigation channels
  • Conforms to the normal shape of ditches (minimizing transition)
  • Operates under higher degrees of submergence than Parshall flumes
  • Straight through bottom permits the passage of debris
  • Excellent usable head at low flow rates
  • Maximum flow rates from 43.0 GPM – 663.8 GPM (Small to Extra Large 60 Degree V Trapezoidal)
  • End adapters are available for Small, Large, and Extra Large 60 Degree V Trapezoidal flumes to connect to existing pipe

 

Cutthroat

  • Similar to Parshall flumes except with flat bottom and no extended throat
  • Developed for use in flat gradient channels
  • Operates satisfactorily under both free and submerged flow conditions
  • Sized by flume length and throat width
  • Simpler construction than Parshall flumes
  • Simple flow meter calibration
  • Flat bottom for self-cleaning of small debris (1” and 2” throat widths not recommended for sanitary flows)
  • Maximum flow rates from 52.6 GPM – 43,494 GPM
  • Not available with standard end adapters to connect to existing pipe
  • Most common uses include stream gauging and flow splitting

 

RBC

  • Developed for use in small furrows and unlined canals
  • Simple construction
  • Scaled versions of the general flume
  • Five throat widths (50mm, 75mm, 100mm, 150mm, 200mm)
  • Ideal for very low flow rates
  • Maximum flow rates from 22.98 GPM – 790.79 GPM
  • Inlet and outlet wingwalls recommended for use in unlined canals
  • Portable
  • Caution should be used in flows with solids

 

Montana

  • Design is a Parshall flume with the throat and discharge sections removed
  • Uses the same discharge table as a similarly sized Parshall flume
  • Standard design conforms to U.S. Department of the Interior, Bureau of Reclamation, Water Measurement Manual
  • Available in throat widths of 1” to 180”
  • Self-cleaning in most circumstances (not recommend for sanitary use in 1” and 2” sizes)
  • Available in nested configurations
  • Available with inlet end adapter to connect to existing pipe
  • Simple flow meter calibration
  • Maximum flow rates from 85.3 GPM – 467,200 GPM
  • Cannot withstand any degree of submergence
  • Not commonly used

REQUEST QUOTE

Please contact us directly for a quotation

Call (415) 808-2469

EMAIL

Viewed

Testimonials

    "Thank you for everything. I truly thought customer service had been placed in the Smithsonian, but it is so refreshing that you went above the call of duty. Keep up the good work, for it is people like yourself that will keep us coming back."

    Process Engineer
    Chemical Plant