When you choose a Parshall flume for your water management operation, the size of your flume is the most important factor to consider. The Parshall flume, unlike other flume styles, offers standard dimensions, regardless of the size of the flume that you choose. Because of the standardization of Parshall flumes, many people assume that they can simply pick a flume and install it in their system, but this may not be the case when installing a small Parshall flume.
The sidewall height of your small Parshall flume can vary, depending on the flume’s size and, if you’re not careful, you may choose a primary device that doesn’t fully meet your needs. Here is some information about the sidewall height of small Parshall flumes that you should consider before installing this device in your operation.
Different Flume Sizes
If you’re interested in installing a small Parshall flume in your system, it’s important to keep in mind that these flumes come in a range of sizes, all of which have different sidewall heights. Small Parshall flumes range from one to three inches and, depending on the size you choose, the sidewalls can be as short as six inches and as tall as two feet.
Because the sidewall heights in these flumes can differ greatly, you need to be certain that the flume that you choose can accommodate your system’s maximum flow rate. Failing to keep in mind the flow rate in your system when choosing your flume can lead to a variety of problems, including inaccurate measurements.
Tips for Picking a Flume
As mentioned, correctly sizing your Parshall flume requires you to determine the flow rates in your system. While it’s common to be concerned mostly with the maximum flow rate, you also need to be sure that you determine the minimum flow rate in your system. If the minimum flow rate in your system is too low, you may need to choose a type of flume that is specifically designed to handle low flows, such as the Cutthroat flume.
After you’ve determined your flow rates, you can compare them to the discharge table of your flume to make sure your device suits your system. If you find that your flume cannot handle your typical flow rates, you’ll need to choose a new device.
Picking Your Material
Once you’ve sized your flume, you’ll choose a material for the device. While some operations choose to construct their Parshall flumes out of sheet metal, using fiberglass is almost always the better choice, particularly in a permanent installation. Fiberglass is one of the most durable materials you could choose for your flume and will resist most types of environmental damage. Not only will this help your device last well into the future, it will eliminate most of your continual maintenance needs.
Purchase Small Parshall Flumes
If you’re ready to invest in small Parshall flumes for your operation, Tracom, FRP is your go-to resource. We produce Parshall flumes in a range of sizes, and we can help you select a fiberglass flume that will fit perfectly into your system. Contact Tracom today so we can tell you about our products and help you choose a primary device.
