Flow Monitoring/Metering (Flumes)
Trapezoidal Flumes, Parshall Flumes, H-Flumes, and Palmer Bowlus Flumes all have a unique place in the wastewater industry and are used in monitoring sewage, plant effluent, storm water and irrigation water. Flumes are available with numerous accessories and adaptations to match your flow and installation requirements. Made of fiberglass reinforced polyester (FRP) they offer optimum corrosion resistance.
The Plasti-Fab Packaged Metering Manhole was an industry first and remains the most complete and easy-to-install flow measurement package on the market. The full range of flumes may be integrally molded into the composite manhole, along with inlet and outlet adapters, pipe stubs, and monitoring accessories for a complete package.
As a leader in corrosion resistant equipment for fluid measurement and control, Plasti-Fab has thousands of gages installed in corrosive environments around the world. Plasti-Fab products are fabricated from highly corrosion resistant composite fiberglass reinforced plastic (FRP) with a 25 year corrosion warranty.
Palmer Bowlus Flume
The Palmer-Bowlus flume is well know in the sanitary field, and has been used for over 60 years. It’s primary application is in pipelines, in round bottom channels or in manholes where it is often preferred because of cost and ease of installation that can minimize construction expense.
The H flume and related HS & HL flumes are gaining in popularity due to their ability to handle wide ranging flows that can vary by as much 100:1 or more from low to peak. Because of the unique throat, which resembles a weir in some respects, the H flumes provide excellent resolution at low flows and still have capacity to capture peak flow readings on many 15 to 25 year storm events.
Trapezoidal flumes fall into two principal groups, 60º V-notch flumes and larger trapezoidal flumes. The 60º V flumes have a sharp V-throat section similar to a V-notch weir and produce superior resolution for accurate flow measurement down to 1 gpm. The larger trapezoidal flumes, up to the 2 foot SRCRC flume, have flat floors and sloping sidewalls and can handle flows up to 32 MGD.
Used in monitoring sewage, plant effluent, storm water and irrigation water the Parshall flume is still the best known and most widely used for permanent installations. It is available in throat sizes from 1 inch to 12 feet. Parshall flumes are available with numerous accessories and adaptations to match your flow and installation requirements. Made of fiberglass reinforced polyester (FRP) Plasti-Fab Parshall flumes offer optimum corrosion resistance and are the industry leader in measuring flow. For extremely severe industrial effluents they are also available in Vinyl Ester, stainless steel or other special materials as needed.