The key in running a successful water management operation is having the right tools for accurately measuring flow. While there are several tools that you can choose, one of the most effective is a weir. Installing a weir in your system provides several benefits, including consistently accurate readings and extreme durability. Weirs can also be installed in either a man-made or natural channel.
If you’re interested in using a weir for your flow management needs, there are several factors that you need to consider. However, the most important issue is the flow regime that you expect in your system. Read about possible weir flow regimes, and discover how you can improve the accuracy of your readings by purchasing your flow measurement tools from the right source.
When you install a weir in your system, there are two possible flow regimes. The first, and most common, weir flow regime is free flow. Free flow, or modular flow, means that there are now downstream conditions that may restrict your weir discharge, meaning your flow will spill over the nappe of your weir into the air. Free flow requires that the lowest point of your weir crest is higher than the lowest downstream water level.
Both contracted and suppressed weirs can be used in free flow conditions — contracted weirs automatically aerate flow, suppressed weirs need a vented nappe for aeration.
If the downstream conditions in your system prevent free discharge from your weir, then the flow is considered to be submerged. This is also known as non-modular flow. When your flow is submerged, you will experience flow readings that are higher than your actual flow rate. As you might expect, this will greatly impact the success of your operation.
Submerged flow requires your operators to perform a submergence correction calculation. This can be very complicated, which is why it’s best to avoid submerged flow if at all possible.
Choosing Weir Flow Regimes
Now that you know a little more about weir flow regimes, it’s time to learn which is the right choice for your operation. If your main goal is to use your weir to measure flow, then you should strongly consider installing under free flow conditions. A weir that operates under free flow conditions will provide much more accurate readings and lead to a more successful operation.
If you want to promote free flow conditions, you may need to install your weir slightly higher than you might anticipate. Installing your weir so that it operates under free flow conditions is the right choice for nearly every water management system.
Flow Measurement Tools
When it comes to flow measurement, there’s almost no better option than installing a weir. Although free flow conditions are best, weirs are also accurate under submerged conditions provided your operators understand how to make the necessary corrections. After learning about the different weir flow regimes, you need to purchase a high-quality weir from a trusted source likeTracom, FRP.
Shopping with Tracom means having access to the best flow management tools on the market today, including accurate, durable weirs.Contact us today to get a free quote and to learn more about our weirs and other flow measurement tools.
Measuring wastewater is one of the most difficult water management tasks that exists. While some wastewater flows are easy to access, others are very hard to measure because they are in open channel conditions and are below grade. If you need to measure below ground wastewater flow, there are a few factors that you need to consider to help you choose the right tool for the job.
With a little preparation, your operators should be able to take the accurate wastewater flow readings that your system needs. Here are a few tips for measuring below ground wastewater flow and advice for installing flow management tools in your system.
In some wastewater situations, it’s possible to measure the flow using a vault or an existing manhole. While this is a convenient solution for measuring your below ground wastewater flow, it also results in some complications that you need to consider.
With an existing manhole, your measuring device must fit entirely inside the manhole. This means that the flow will need to be very small, which is often not possible in wastewater applications. If using an existing manhole is your only option for accessing your wastewater flow, you should be sure to use a Palmer-Bowlus flume, a type of flume expressly designed for measuring piped sewer flows.
Packaged Metering Manholes
The majority of wastewater flows will be too large to measure using an existing manhole. In these situations, many wastewater flow management operations choose to use a packaged metering manhole.
A packaged metering manhole is a good choice because your flume will be integrated into the manhole, providing easy flow access. Additionally, your flume can be extended either upstream or downstream using the barrel included in your manhole. Most wastewater operations will find the success they need by installing a packaged metering manhole.
Whichever flow measurement operation you choose for your system, you need to think very carefully about the nature of your wastewater flow. For example, wastewater flows need to be both in open channel conditions and subcritical when entering your flume. While this is easy to achieve in sewer systems, it may be more difficult in other wastewater operations.
If the wastewater flow that you need to measure is supercritical, then you may need to install an energy absorbing manhole instead of a standard packaged metering manhole. Before choosing your flow measurement device, fully consider the nature of your flow and if it’s likely that it will need to be conditioned before entering your flume.
The Right Tools for Below Ground Wastewater Flow
Several considerations need to be made before you can successfully measure below ground wastewater flow. In addition to deciding how you will access your flow, you need to choose the right tools for the job. Finding the tools you need to measure below ground wastewater flow is easy when you work with the professionals atTracom, FRP.
Tracom specializes in offering top of the line fiberglass water management products, and our catalogue features all of the tools you need to measure wastewater flow, including Palmer-Bowlus flumes and packaged metering manholes.Request a quote from Tracom today and start shopping for the flow measurement tools that will best fit your needs.
Successfully operating a water management operation is extremely complicated. In addition to picking a flow measurement tool that you know will give you accurate readings, you need to be sure that your flow device can be incorporated into your existing system. This can be extremely complicated when you need to measure flows in non-full pipes.
While flumes can be transitioned into pipes, some of the most popular flumes were not designed for this purpose, making it very easy to experience flow measurement errors. Here are a few pipe to flume transition errors you need to avoid, and tips for installing the highest quality flow measurement tools possible.
Installing Too Low
If you want the flume in your system to work correctly, the flow approaching your flume needs to be calm and free from turbulence. Any upstream disturbance can reduce the accuracy of your readings and impact the success of your operation. To make sure your flow is at the proper rate, it’s imperative that your flume is installed level with the entry pipe.
When the flume is installed below the pipe, it has the potential to accelerate the flow in your system, limiting the effectiveness of your flume. During installation, make sure that you’re installing your flume so that it evenly transitions into your pipe.
While flow needs to be calm as it approaches your flume, it must be subcritical as it enters the flume. If your flow is allowed to reach supercritical rates before entering your flume, your operators will get wildly inaccurate readings. One of the main causes for accelerated flow entering a flume is a steep pipe slope.
If the slope of the pipe transitioning into your flume is too steep, it will accelerate your flow to a surprising degree. Commonly, steep pipes result in supercritical flow and less accuracy. Be sure that your pipe is as level as possible to prevent supercritical flow from entering your flume.
For your operators to get the accurate readings that you need, your flow must have a normal velocity profile as it approaches your flume. This means that you need to maintain proper upstream conditions. Unfortunately, upstream conditions can be impacted by a wide variety of factors, including how you transition your pipe into your flume.
For instance, if the pipe is installed too close to the converging section of your flume, it will be nearly impossible for your flow to distribute evenly or achieve the correct velocity profile. Install your pipe the correct distance from the flume’s converging section to avoid this serious problem.
Get Help with Pipe to Flume Transition
As you can see, transitioning a pipe into a flume is a very delicate operation. If you make one of many common errors during installation, you won’t be able to get the accurate readings that you need. The best way to make sure your pipe to flume transition is established correctly is to have the best tools for the job, and your top resource for high-quality water management products isTracom, FRP.
Tracom offers a broad catalogue of fiberglass flow management tools, and we can help you find the products you need for success.Contact Tracom today to learn more about our water management tools.
Measuring flow in an industrial operation can be extremely difficult without the right tools, and for many industrial systems the most effective measuring solution is a packaged metering manhole. Sometimes called flow metering manholes, packaged metering manholes provide for a convenient, versatile flow measurement solution that your operators will be sure to appreciate.
If you’re not familiar with packaged metering manholes but are considering installing one for your water management operation, it’s a good idea to learn more about the benefits of this flow measurement device. Learn the basics of flow metering manholes and discover the benefits of using this premier flow measurement tool in your water management operation.
One of the primary reasons that industrial water management systems are increasingly turning to packaged metering manholes for their measurement needs is flume integration. A packaged metering manhole includes your flume or weir in an enclosed location, providing easy access to your operators. The needs of your operation will determine the type of flume that you use.
For example, while it’s sometimes possible to using an H-flume, packaged metering manholes more commonly include Parshall flumes or Palmer-Bowlus flumes, as they are more capable of handling industrial flow. Having your flow measurement device integrated right into your manhole provides an increased level of convenience and versatility.
Choosing Manhole Covers
When choosing a packaged metering manhole for your water management system, you may be surprised to learn that there are a variety of manhole covers that you can choose. Different manhole covers serve different purposes, making it a good idea to learn more about your options before making a decision.
For example, if there is the possibility of vehicle traffic in your operation, you should consider a traffic reducer top, which is ideal for streets and parking lots. If you’re looking to give your operators easy access to your flow measuring device, a domed fiberglass top is usually the best choice. Aluminum tops are also available, but they are not commonly used.
Advantages of Flow Metering Manholes
If you’re still on the fence about packaged metering manholes and whether they’re the right choice for your system, it’s a good idea to learn about some of the benefits of this tool.
The primary benefit of a flow metering manhole is that they can be installed extremely quickly, meaning your system will only be down for a short period of time. In addition, these tools are highly resistant to corrosion, making them low maintenance. Packaged metering manholes also provide a wide range of measurement devices, many of them can be integrated in a factory.
Installing a flow metering manhole for your system provides several advantages that you won’t be able to find with other flow measurement tools.
Shop for Flow Metering Manholes
Clearly, flow metering manholes are the tool that you need when you’re looking for a durable, convenient solution for measuring flow for your water management system. When you’re ready to take advantage of the numerous benefits of flow metering manholes, you need to start shopping withTracom, FRP.
Tracom is proud to offer our customers a great inventory of fiberglass water management tools, including packaged metering manholes, and we would be happy to help you find the equipment that your system needs.Learn more about our products today and find out how Tracom can help you.
While there are a wide variety of flow measurement tools that you could employ in your water management operation, few are as versatile and effective as H-flumes. By choosing an H-flume, you’ll be getting an extremely sensitive measurement tool that is also resilient in the face of sedimentation and debris accumulation. For free-spilling discharge measurement, there’s no better tool than an H-flume.
However, like almost every flow measurement tools, making sure you get the most out of your H-flume depends on proper installation, which can be difficult if you don’t know the right steps. Read this quick H-flume installation guide that will help you incorporate this extremely useful flow measurement tool into your operation.
Sizing Your Flume
The first and most important step in planning your H-flume installation is ensuring that your flume is the correct size. Contrary to what you might believe, this can be extremely difficult and requires estimating four different flow rates. Without these numbers, you won’t be able to size your flume correctly, causing future problems for your operation.
The four flow rates that you need to calculate are average flow, minimum flow, maximum flow and surge flow. Once you know these numbers, you can accurately choose the size of your H-flume.
After sizing your H-flume to correctly handle the typical flows in your system, you next need to consider the conditions at the installation site. Unfortunately, not every installation site will be suitable for your H-flume. Examining the site before you begin the installation process may save you quite a deal of effort and frustration.
First, you need to consider the upstream conditions. For instance, the upstream flow entering your flume should be the right velocity and properly developed. You should be certain that turns in your channel are as far away from your flume as possible.
Second, you need to correctly position your flume. Your H-flume should be placed completely level in your channel and the v-shaped notch of your flume should be pointed downstream. When placing in a natural channel, you will need to anchor your flume and make sure that there is no risk of flow bypassing your flume.
Thirdly and finally, you need to examine your potential downstream condition. The main reason for this is that H-flumes are extremely vulnerable to submergence. If submergence is a concern, an H-flume may not be the right choice for your operation. You will also need to be certain that discharge is able to spill freely if want the most accurate readings possible.
Follow Your H-Flume Installation Guide
With these simple tips, you should be able to easily and successfully install your H-flume. However, before you can start following your H-flume installation guide, you need to purchase your H-flume, which is why you should work with the water management professionals you’ll find atTracom, FRP.
The benefit of working with Tracom is having access to a huge inventory of dependable fiberglass water management tools. One of our representatives can help you browse through our catalogue until you find the tools that you need to improve your water operation’s level of success.Ask for a quote from Tracom today so that you can start equipping your system with fiberglass H-flumes.
If your water management system depends on flow measuring flumes, you have several factors to consider to make sure you’re getting the accurate readings that you need. However, the most important factor to take into account is the velocity of the flow approaching your flume. Flumes cannot operate correctly unless the flow is subcritical. If flow is too energetic or poorly developed, your operators won’t be able to take consistently accurate measurements.
When it’s necessary to reduce the velocity of your flow before it reaches your flume, there are several tools you could choose, but none is more effective than an energy absorbing manhole. Here are a few facts about energy absorbing manholes that you need to consider when your operation is experiencing turbulent flows.
Energy Absorbing Manhole Operation
If you’re not familiar with energy absorbers, then you might not know how energy absorbing manholes work. Learning more about the functionality of these tools is a good starting point when you’re considering installing an energy absorbing manhole in your water management system.
Inside an energy absorbing manhole is something known as a dissipating baffle. The baffle works to slow down the energetic flow and absorb its energy. Once the flow passes around the bathroom, it will be more consistent and its energy will be reduced, after which it will pass out of the energy absorbing manhole and into your flume. By installing an energy absorbing manhole, you’ll be able to slow your flow before it enters your flume.
Where to Install Your Manhole
Once you’ve learned more about how an energy absorbing manhole is used, it’s common to wonder where this tool will be installed in your water management system. Typically, your energy absorbing manhole will be installed upstream from a packaged metering manhole, which will contain your flow measurement device. There are several reasons for this install location.
First, installing your energy absorbing manhole in the same location as your metering manhole reduces the labor required for the task. Secondly, positioning your energy absorber near your flow measurement device makes it much easier for you to control the energy of your flow, improving the accuracy of your readings and leading to more consistent success.
While it’s the best solution, installing an energy absorbing manhole in conjunction with a packaged metering manhole is not a strict requirement. However, by combining these tools, you will be increasing the versatility and consistency of your flow measurement operation.
Purchase Energy Absorbing Manholes
Although it’s not a concern for every water management operation, energetic and poorly developed flows can pose a big problem. If your flume doesn’t receive subcritical flows, your operators won’t be able to take the accurate readings that your system needs. Fortunately, when you experience turbulent flows, you have the option of installing energy absorbing manholes.
To get the energy absorbing manholes and other flow management tools that you need, you should consider shopping withTracom, FRP. At Tracom, we understand the needs of water management systems and our focus is on providing the fiberglass tools that they need for success. Whether you need an energy absorber or some other piece of equipment, Tracom is your best resource.