Envco – Environmental Equipment

Parshall, Palmer Bowlus, and “H” Flumes are constructed of high quality polyester resin and fiberglass. These flumes are durable, highly accurate, and easy to install.

These primary device flumes constrict an open channel’s flow either horizontally, vertically, or both horizontally and vertically. Once the flow is backed up behind the flume’s 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 lookup table.

Global Water’s three standard molded flumes include:
• The Parshall flume, which constricts primarily horizontally, and is design for rectangular or trapezoidal channels.
• The Palmer-Bowlus, which constricts the flow vertically and horizontally and can be molded to be inserted into an existing half-round pipe.
• “H” flumes, which attach to the ends of pipes where the water is free-falling.

Ordering Information
Order No. Flume Type Price
01-006 Flume Type Parshall Size 1"W
01-007 Flume Type Parshall Size 2"W
01-008 Flume Type Parshall Size 3"W
01-009 Flume Type Parshall Size 6"W
01-010 Flume Type Parshall Size 9"W
01-011 Flume Type Parshall Size 12"W
01-012 Flume Type Parshall Size 18"W
01-014 Flume Type Palmer-Bowlus Size 4"D
01-015 Flume Type Palmer-Bowlus Size 6"D
01-016 Flume Type Palmer-Bowlus Size 8"D
01-027 Flume Type “H” Size 0.5"H
01-028 Flume Type “H” Size 0.75"H
01-029 Flume Type “H” Size 1.0"H
* Larger sizes are available, please email for more information.

Accessories
Flume-SW8 Attached 8" Stilling Well
Flume-SWP2 2" Stilling Well Port
Flume-SG Staff Gauge
Flume-BT Bubbler Tube
Flume-WW Wingwalls (pair)
Flume-SW2 2" Stilling Well
Flume-CAC Concrete Anchor Clips