Envco – Environmental Equipment

RF Series Ramp Flumes are low cost fl umes built for easy installation and high accuracy.

Rugged Design
The Ramp Flumes are built from high grade 16 gauge galvanized steel and will resist most corrosive environments. The design utilizes rigid fl anges and bracing to allow the use of soil as a backfi ll during installation.

Easy Shipping
The flumes are shipped unassembled to minimize cost of freight. The RF3.5, RF7, and RF10 units (with maximum fl ow rates from 3.5 to 10 cubic feet per second) can be shipped by UPS.

Simple Installation
Installation of a Ramp Flume is simple and straightforward. The fl ume can be transported to the installation site by hand, horse, truck, or ATV. The large ramp fl umes are heavy and will require excavation equipment for lifting and site preparation. However, surveying and complicated excavation are not required, so the cost of installation will be minimal. When installing, simply ensure that the fl ume is level from end to end and side to side. Only a nut wrench and screw driver are necessary for assembly, but gloves should be used for safety during installation.

High Accuracy and Low Maintenance
Extensive testing and evaluation under fi eld and laboratory conditions have shown that the RF-Series Ramp Flumes consistently achieve accuracy to within 3% when properly installed. The increased fl ow velocity in the throat section discourages sediment accumulation in this part of the fl ume. The approach section near the gauge has a self-cleaning function that provides long intervals for debris-free operation and consistent accuracy. This allows for long periods of operation between cleanings and maintenance.

Ordering Information
RF3.5 Flow Range (cfs) 0.1 to 3.5 Flow Range (gpm) 45 to 1,571 (28 kg)
RF7 Flow Range (cfs) 0.1 to 7.0 Flow Range (gpm) 45 to 3,142 (39 kg)
RF10 Flow Range (cfs) 0.1 to 10.0 Flow Range (gpm) 45 to 4,488 (48 kg)
RF20 Flow Range (cfs) 0.5 to 20.0 Flow Range (gpm) 224 to 8,976 (181 kg)
RF40 Flow Range (cfs) 1.0 to 40.0 Flow Range (gpm) 448 to 17,952 (302 kg)
RF60 Flow Range (cfs) 1.5 to 60.0 Flow Range (gpm) 672 to 26,928 (332 kg)