Blog

When we think of steel flumes - whether they be Parshall, Cutthroat, or H type – we are concerned with both the high (stainless) and low (galvanized) end of the market. While fabrication techniques are identical, the applications for steel flumes differ considerably.

The 120-inch Parshall Flume is the second largest of the prefabricated Parshall flumes available. The flume is used to measure larger surface water flows, primary water rights channels, and flows at larger wastewater treatment plants. The size of the flume is such that it must…

The primary uses of the 96-inch Parshall Flume are to either measure surface waters (watersheds / catchments / water rights) or sewage flows at wastewater treatment plants. Like the other large Parshalls, the 96-inch Parshall Flume ships in two pieces for field assembly.

At industrial sites where a Packaged Metering Manhole has been installed it is quite common to see a Parshall flume integrated into the manhole. As part of a site visit to assist a local customer, Openchannelflow personnel took the video below to help visualize what a Parshall…

As Parshall Flumes get larger there are fewer applications that they fit beyond measuring surface waters and treatment plant flows. Even then, the 84-inch Parshall Flume is not frequently used - the flow rates for these applications are usually smaller or larger than the 84-inch…

Depending on what the constituents make up an industry's flow stream, a sewer system's owner (city / county) may require pre-treatment and metering before the industry is allowed to discharge to the sewer.  For many industries, plant downtime is a major concern when…

Of the various methods Openchannelflow has developed for conditioning flow for flumes, Tranquilizing Racks are the most common.  Tranquilizing Racks are vertical "fingers" that extend down into the flow to break up poor velocity profiles and develop uniform, straight line…

For industries required to measure and / or sample their effluents prior to discharging to a municipal sewer system or surface water, finding sufficient area to install a primary device can be a struggle.  In many instances, it is difficult to find a site that provides…

Openchannelflow has designed a bubbler flow meter tube for flumes and weirs that is unique in the marketplace.  The tube is one continuous piece of thick walled tubing.  The top of the bubbler tube - where the traditional compression coupling is found - is swaged to…

Pure and simple, Openchannelflow makes fiberglass Parshall flumes.  We aren’t resellers, we aren’t distributors, and we don’t job shop production. Catalog companies and “design” resellers simply don’t have the close-coupled integration of…