For water systems that rely on accurate flow measurements, it’s common to combine the primary measuring device, such as a flume or weir, with a secondary device. However, because flow can be turbulent, many operations choose to mount their secondary device inside of a stilling well.
If you’ve never used a stilling well in your system before, it’s a good idea to learn more about this common tool and how you can best use it in your operation. Learn a few common facts about stilling wells, and advice for purchasing and installing this versatile measurement tool in your operation.
Stilling Well Basics
The first thing that you need to understand before installing a stilling well in your system is what this device is for and how it works. As its name might suggest, a stilling well is a chamber that is isolated from the main flow in your weir or flume. The level of the water in the stilling well will match the level in your primary device, but will be less energetic.
Because the flow inside of the stilling well is less turbulent, it makes the perfect location for installing a secondary measuring device like an ultrasonic meter or a bubbler. With a stilling well, your operators will be able to take much more accurate readings, increasing the success of your system.
Attached and Detached
When you install a stilling well inside of your flume or weir, you will have two different options, attached and detached. Each style has its own advantages, so it’s a good idea to examine them in closer detail.
An attached stilling well is incorporated into your flume or weir, usually through welding or molding. Detached stilling wells are located outside of your primary flow measuring device, and are connected to the flow using tubing.
Using an attached stilling well can be difficult depending on the type of flume you use, as certain flumes, like Trapezoidal flumes, do not have the type of flat sidewalls that are suitable for attachment. On the other hand, with a detached stilling well, it can be very easy for the tubing to become disconnected.
While stilling wells are generally a useful tool, there are certain applications where they simply cannot be employed. Primarily, a stilling well should not be used in a system where there is high risk for sedimentation, such as with sanitary flows. In these systems, it’s very likely that the inlet of your stilling well will become blocked, preventing flow from entering the chamber.
You should also think twice about using a stilling well for cold water flows. If ice forms, it can block the inlet, requiring frequent maintenance from your operators. While immersion heaters can be used to prevent this, it means an added expense.
Purchase Stilling Wells
Although there are some factors that you need to keep in mind, a stilling well is a great choice for any system that wants to take accurate measurements by installing a secondary device. To get the high-quality stilling wells that your system needs, your best option is working withTracom, FRP.
Tracom produces flow management products like flumes and weirs, as well as accessories like stilling wells. We can help you equip your operation with the tools that you need.Contact Tracom today.
When you need to accurately measure flow in your operation, the best tool that you can choose is a flume. However, there are certain situations where a single flume won’t suffice, such as when you need to measure a range of flows. Fortunately, if you want to measure different flow ranges using flumes, you have the option of using nested, or dual range flumes.
Nested flumes are a versatile solution for measuring multiple flow ranges, and can be employed in a variety of ways. Learn more about nested flumes, and find out how you can install this flow measuring tool in your water management system.
What Are Nested Flumes?
If you’re interested in using nested flumes in your system, then it’s a good idea to learn more about these flumes and how they’re used. The easiest way to understand nested flumes is to think of them as a combination of a small flume and a large flume. As you might expect, the smaller flume is placed inside the larger flume, allowing them to effectively measure different flow ranges.
Nested flumes can be used to measure different types of flow. For example, nested flumes can be used to measure high to low flows, low to high flows and seasonal flows in outdoor applications. When you need to measure multiple flow ranges, your best solution is a nested flume.
Types of Nested Flumes
Now that you know more about nested flumes and how they work, you need to learn which types of flumes can be nested. Fortunately, multiple styles of flumes can be nested, including some of the most popular flume options. Parshall flumes are the most common type of nested flume. However, Cutthroat flumes and Montana flumes can also be nested.
Interestingly, the smaller interior flume does not have to be the same style as the exterior flume. For example, HS/H flumes and Trapezoidal flumes can both be used as interior flumes even though they aren’t suitable for the exterior flume.
Once you’ve chosen the type of flume that you wish to be nested, you need to decide how it will be installed. Nested flumes can be installed using several different methods depending on the needs of your system.
Nested flumes meant to measure low to high flows are usually factory installed, as they are temporary. If you need to measure high to low flows, you will need a permanent field installation. Finally, for measuring seasonal flows, you will likely choose a removable installation so that your nested flume can be reinstalled whenever you need to measure different flow ranges.
Consider how you will use your nested flume and you’ll easily be able to choose your correct installation type.
Install Nested Flumes
For operations that need to measure dual flow ranges, there is no better tool than a nested flume. If you’re interested in installing nested flumes in your system, then you need to get them from the right source, which is why you should shop withTracom, FRP.
Tracom’s specialty is offering high-quality fiberglass flumes that are perfect for nesting. When you browse the Tracom catalogue, you’ll easily be able to find the tools that your system needs for long-term success.Request a quote from Tracom today.
Running a water management operation requires taking a wide range of measurements. In addition to measuring the flow in your system, many systems must measure the water level of their channel, and one of the best tools for accomplishing this goal is an ultrasonic flow meter.
If you’re considering using an ultrasonic flow meter in your operation, it’s a good idea to learn how this tool works and some of the issues that can impact its performance. Here is information about how an ultrasonic flow meter works, and advice for installing this measurement tool in your system.
How Ultrasonic Flow Meters Work
An ultrasonic flow meter is one of the most versatile, accurate measurement tools on the market today because it uses sound to determine the water level in your system. When an ultrasonic flow meter takes a reading, it emits a high-frequency sound puce towards the surface of your flow, where it will hit the water and create an echo. The flow meter measures how long it takes the echo to return to the meter, and this is how it determines the flow level.
At the initial setup, the ultrasonic meter is usually installed with a predetermined flow level, which can either be with no water or a small amount of water. This is done to calibrate the meter so that its readings will be accurate.
Now that you know the basic functioning of an ultrasonic flow meter, it’s a good idea to learn about a few of the different types of interference that your flume may encounter. Understanding these interferences will make sure that you get the most utility possible from your flume.
Most of the risks to your flow meter are environmental in nature. For example, strong winds can interfere with an ultrasonic sensor, as can solar heating. Also, an uneven flow surface due to foam or turbulence can cause inaccurate readings. If there are obstructions in the water, it’s also possible for a false echo to occur.
If you want to make sure that your flow meter functions properly, it’s crucial that you take precautions to avoid the types of interference mentioned in the previous section. In systems where solar heating is a risk, you can install a sensor shade to protect your flow meter. Some operations choose to increase their echo strength to counteract turbulent surface flow.
It’s also important your system can accommodate an ultrasonic meter. Channels that are less than six-inches wide or experience constant turbulence should choose a different level measuring option.
Install Flow Meters
For most water management systems, the best way to measure water level is by using an ultrasonic flow meter. These tools are accurate, and extremely easy to use. If you want to install an ultrasonic flow meter in your system, you need to make sure you have a matching flow management device like a flume by shopping withTracom, FRP.
Tracom is proud to offer our customers an impressive selection of water management products, including measuring devices like flumes and weir boxes. Our tools will improve the accuracy and success of your operation.Request a quote from Tracom today.
In water management operations across the world, the most popular measurement tool is a flume. However, while these tools are commonly used, many people don’t understand the many crucial parts of this complicated device. To get the most out of the flumes in your water management system, it’s important to understand all of the different flume parts and how they work.
Here are a few facts about the parts of a flume, and advice for installing high-quality fiberglass flumes in your water management system.
One of the most important parts of the flume is the dimensional bracing. This piece is installed at the top of your flume, and makes sure that the following sections maintain the right dimensions. Without the bracing, the wall of a flume would not stay separated, making this device completely unusable.
Flow Surface and Anchor Clips
The part of the flume that most people are familiar with is the interior flow surface. As you might expect from its name, this is the flume part that is actually in contact with the flow in your system. If you use fiberglass flumes, this part can also be referred to as the gloss surface.
Another important flume part is the anchor clip. These clips help attach the flume to a concrete channel. However, contrary to what you might believe, the anchor clips will not keep the flume in place. Some other security devices, such as sandbags, are needed to accomplish this purpose.
Flanges and Stiffening Ribs
Some parts of the flume are crucial for adding stiffness to the device. For example, two of these pieces are top and end flanges. The top flanges keep the straight edges of your flume rigid, increasing the functionality of your flume. Top flanges can also be used to help with installing a hanging flume.
Stiffening ribs also provide rigidity for your flume. Generally, these pieces are installed on the floor or sides of a flume that are meant to be on flat surfaces. Stiffening ribs are usually constructed using PVC or cardboard. However, it is common to encounter poor bonding when using one of these construction materials.
The flume exterior, the outside of the flume, is the simplest piece. The exterior of the flume is where any accessories, such as the anchor clips, are attached. It is also possible for the exterior of the flume to be made in varied styles. For example, the exterior of fiberglass flumes are often patterned, whereas PVC flumes can be smooth.
Examine the Parts of a Flume Yourself
As you can see, the flumes in your water management system include a variety of important parts. Without these pieces, your flume would not function correctly and you would not be able to take the accurate readings your water system needs. Now that you understand the parts of a flume, you need to purchase high-quality flumes for your system from Tracom, FRP.
In the Tracom inventory, you’ll find a wide range of fiberglass water management products, including a gigantic selection of flumes. With Tracom products, your system will have a consistent level of success. Contact Tracom today for more information.
The Parshall flume is one of the most accurate, versatile flow measurement tools in the entire world. However, while the Parshall flume is accurate, you need to make sure that you are using it the right way, which means promoting the proper upstream conditions.
If your upstream conditions aren’t ideal, it will be very difficult for your operators to take the accurate readings that you need, potentially impacting the success of your system. Fortunately, maintaining upstream conditions is easier than you might think, particularly when you have the right tips at your disposal. Learn how you can ensure the right Parshall flume upstream conditions, and find out how you can get the highest quality Parshall flumes possible.
Measuring flow is extremely complicated, and requires several basic conditions. To get the accurate readings that you need, the flow entering your Parshall flume needs to be subcritical. This means that its velocity shouldn’t be too high, and its surface must be free from turbulence.
To prevent turbulence, you need to be sure that your flow is approaching your Parshall flume in a long, straight channel. Generally, this can be accomplished by having an approach that is ten to twenty times the width of your Parshall flume throat.
Similarly, your flow needs to be evenly distributed, meaning the surface of the flow is uniform. To ensure even distribution, the floor of the approach channel must be level. If the floor of your channel isn’t level, you will likely see surface turbulence.
Other Upstream Requirements
Once you’ve ensured the basic requirements for proper upstream conditions, there are a few other tasks you should complete to make sure the flow entering your flume is subcritical.
First, there should be no bends directly upstream of your flume. Any bend in the upstream channel can affect flow distribution and potential velocity. Second, you need to be certain that the flow smoothly transitions from the channel to your flume. The easiest way to do this is to install side wing walls that gradually converge. Finally, if you’re working with a natural upstream channel, you must maintain the banks and prevent vegetation to preserve your flow.
You also need to think about the likelihood that submergence will occur with your flume. While Parshall flumes can still function in submergence conditions, it makes things much more difficult. If submergence is a possibility, you can install your Parshall flume so that it is slightly above the floor of the channel. Following these guidelines will ensure that you’re able to take the accurate readings that you need.
Get Help with Parshall Flume Upstream Conditions
If you want to get the most out of your Parshall flume, then it is imperative you’re maintaining the right upstream conditions. Fortunately, as we have seen, preserving your upstream conditions is easy when you follow the right tips. After your Parshall flume upstream conditions are secure, you need to purchase your flume from a trusted manufacturer likeTracom, FRP.
Tracom offers a wide selection of fiberglass products including Parshall flumes, and we can provide you with the flow management tools that you need.Contact Tracom to get more information about our catalogue and to request a product quote.
When it comes to managing and measuring flow, the best choice is a flume. However, depending on the needs of your operation, you may need to connect your flume to a pipe, which poses a wide range of difficulties. In particular, you need to make sure that the downstream or upstream slope of your pipe is not steep enough to affect the rate of your flow.
If you’ve never connected a flume to a pipe before, it’s important to get a few tips about pipe slope and to learn how it can impact your system. Learn more about pipe slopes for fiberglass flumes, and why you need to be certain that your operation has the right tools.
To get the accuracy that you need out of your flume, you need to be certain that the upstream of your flow is subcritical. If the pipe upstream of your flume is too steep, it can massively increase the speed of your flow and impact the accuracy of your readings.
The appropriate pipe slope will largely depend on the length of the line. For instance, if the line size is 8 inches, then your upstream slope should be about 2 percent. Whatever the correct slope, any upstream pipe will need to include a straight run, meaning a section that is free from bends or elbows. Generally, you will need a straight run of 15 pipe diameters if you want to maintain a proper flow velocity.
If your pipe has a smaller capacity, your straight run can be slightly smaller. It may also be possible to use a flow conditioner if you’re having trouble with your slope or straight run, but it’s usually better to install everything correctly.
Making sure your upstream conditions are correct is the most important part of connecting your flumes to pipes, however, you also need to promote proper downstream conditions. Fortunately, the pipe slope conditions for the flow downstream of your flume are much simpler and more easily accomplished. Ideally, the downstream slope will be the same, or larger, as the upstream slope. Otherwise, you may experience flow backing up into your flume.
You also need to make sure that your downstream pipe is sized correctly. Just like with the slope, the size of your downstream pipe should be the same as your upstream pipe. Also, you will need a downstream straight run of at least 5 pipe diameters to prevent backup.
Pipe Slopes for Fiberglass Flumes Tools
Although it may take a little bit of effort, connecting a pipe to a flume and ensuring the right slope isn’t as difficult as you might think. However, you will need the right tools for the job, and the easiest way to get the right pipe slopes for fiberglass flumes is shopping withTracom, FRP.
In the Tracom catalogue, you will find a huge selection of high-quality fiberglass flow measurement tools, including flumes with end adapters perfect for piped flows. With our products, your operation will have the level of success that you need.Request a quote from Tracom today and equip your operations with the right fiberglass products.