Blog 2016-11-12T09:52:33+00:00

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Differences Between Submerged and Free Weir Flow

When you install a weir in your system, there are a variety of factors that must be considered, including your likely flow regime. Both free flow and submerged regimes can greatly affect the functionality of your weir, which is why it’s so important to understand the difference between the two.

Once you’re clear on what separates free low and submerged conditions, you should be able to get the most out of the weir in your operation. Learn more about submerged and free flow conditions, how they affect your weir, and get a few tips for dealing with each of these flow regimes.

Submerged Flow and Weirs

Submerged low results when the downstream conditions are altered, resulting in less water discharging over your weir. While this isn’t necessarily a cause for concern, it can interfere with the measurements taken by your operators. If the weir in your system is currently experiencing submergence, the readings taken by your operators will show that your flow rate is much higher than it is in reality. If you don’t take this into account, your operation’s success will likely be deceased.

Fortunately, it’s possible to correct for submergence by making some small calculations. However, this means that your operators will need to understand the proper method for submergence correction.

Free Flow Conditions

Free flow occurs when the downstream conditions in your system are unaffected. This is also known as modular flow. If you have a free flow regime, it means that water is freely spilling over the nappe of your weir.

The level of water will need to be lower than your weir crest’s lowest point of elevation for free flow to occur. The size of your weir notch will determine whether or not your nappe is aerated.

Which Flow Regime is Better?

Now that you know about the two potential flow regimes and how they can affect your weir, you can decide which better suits your system.

Although your weir can function in both submerged and free flow conditions, free flow is always the better choice. With free flow conditions, your measurements will be considerably more accurate, and your operators will be able to take these readings without having to perform complicated calculations. However, if you want to maintain free flow conditions in your system, you will need to make sure your weir is installed correctly, meaning it will need to be installed higher than you might expect.

Install a Weir in Your System

When installing a weir in your water management operation, preparing for the expected flow regime is of the utmost importance. However, what’s even more important is having the highest quality tools possible. Fortunately, when you need a first-rate fiberglass weir for your water management operation, you only need to shop with Tracom, FRP.

The focus of the team at Tracom, FRP is helping our customers find the fiberglass water management products that will help them succeed. If you browse our catalog, you’ll find some of the best fiberglass products on the market today, including weirs that will function in both submerged and free flow conditions. Talk to us about your needs today so that we can help you purchase the water management tools you need.

Which Flume is Best for Sewer Flows?

if you need to measure sewer flows, it’s likely that you’ll install a packaged metering manhole. However, if you want to get the most out of your manhole, it’s important that you equip it with the right flume.

There are a wide range of flumes that can be installed in a packaged metering manhole, some of which are perfect for managing sewer flows and some that simply aren’t suitable for this task, meaning you need to be very careful about the flume you are using. Here are a few tips to help you choose a flume for sewer flows that you can take accurate measurements that will help your operation succeed.

Parshall Flumes for Sewer Flow

The Parshall flume is the ideal tool for most flow management applications, and this includes measuring sewer flows. There are several reasons that the Parshall flume makes for the perfect sewer flow management option, including its wide throat that allows solids to easily pass through the flume.

Another benefit of using a Parshall flume for sewer flow is that they can easily be corrected for submergence, which can be an issue in sewer applications. It’s also likely that your operators are already familiar with the proper way to use Parshall flumes.

Trapezoidal Flumes

For many sewer flow management operations, particularly those where solids are a concern, the best flume to choose is the Trapezoidal flume. The unique shape of this flume is specifically designed to pass solids, which means you are unlikely to experience clogs when you install this flume in your system.

Trapezoidal flumes are also designed to handle a wide range of flow types and are particularly adept at managing low flows. This can be very beneficial in sewer operations where the flow rate isn’t consistent. Finally, trapezoidal flumes are available in multiple styles and sizes, meaning you can find an option that fits the needs of your operation.

Palmer-Bowlus: The Ideal Sewer Flume

When you’re looking for a flume for sewer flows, your best bet is choosing the flume that was specifically designed for this flow type: The Palmer-Bowlus flume.

Because Palmer-Bowlus flumes are available in several styles, you can install them in new applications or retrofit them into existing applications. These flumes also offer multiple points of measurement, meaning your operator can measure flow wherever it is most convenient. Palmer-Bowlus flumes are also self-cleaning in certain circumstance, reducing the amount of regular maintenance that your operators will need to perform.

For measuring sewer flows, there are few solutions better than installing the Palmer-Bowlus flume.

Purchase a Flume for Sewer Flows

Now that you know about a few of the flumes available for measuring sewer flows, you should be able to choose the primary device that’s right for your operation. If you need help choosing a flume for sewer flows, or if you’re ready to purchase a flume, then you should be sure to work with Tracom, FRP.

Tracom is a leading producer of fiberglass water management products, including multiple styles of flumes, and we would be glad to provide your operation with the tools it needs for long-term success. Contact Tracom today.

Measuring Flow with a Bubbler Flow Meter

If your operation depends on accurate flow measurements it’s important that you choose the right flow measurement tools. While it’s common to assume that the best option for flow measurement is an ultrasonic flow meter, this isn’t always the case. In fact, in many applications, the most versatile option for measuring flow is installing a bubbler flow meter.

If you’re not familiar with the benefits of a bubbler flow meter, it’s a good idea to learn a little more about this tool and how it can boost the success of your operation. Here are some reasons that you should install a bubbler flow meter in your system and advice for choosing your primary management device.

Resistant to Flow Turbulence

When you’re choosing a flow management tool for your system, the most important factor to consider is your type of flow. Certain measurement tools, such as ultrasonic meters, require level, calm flow to function properly, meaning they wouldn’t work in an operation with non-uniform flow. Luckily, bubbler flow meters do not have these limitations.

A bubbler flow meter can measure virtually every type of flow imaginable and is unaffected by common factors such as debris, foam, or changes in the temperature of the flow. If you want a measurement device that will work regardless of the flow conditions, you should choose a bubbler flow meter.

Accuracy and Calibration

Obviously, the most important factor when choosing a flow measurement device is picking a solution that will provide you with consistently accurate readings, and in terms of accuracy, there is no better option than a bubbler flow meter.

A bubbler flow meter is one of the most accurate measurement devices in the world, particularly with low flows. In addition, unlike other flow management tools, bubbler flow meters are capable of self-calibration, putting less pressure on your operators. With this tool in your system, you’ll be able to take accurate readings day in and day out.

Bubbler Meter Disadvantages

Before you install a bubbler flow meter in your system, it’s important to check out a few of the disadvantages of this tool. This should help you decide if installing a bubbler meter is the right choice for your system.

The only real drawback of a bubbler meter is that it relies on an air compressor, which is a moving part that can experience wear over time. This means that it’s possible your air compressor will malfunctioning, interfering with the measurement of your bubbler meter. Also, bubbler meters need a power supply so that the air compressor can work properly, which means that a bubbler meter may not be the best choice in remote applications.

Install a Bubbler Meter

If you’re looking for a consistently accurate flow measurement tool for your operation, look no further than the bubbler meter. However, before you can install a bubbler meter, you will need to choose a primary flow management device for your system, which is why you need to start shopping with Tracom, FRP.

Tracom offers a wide range of dependable primary devices, including fiberglass flumes in multiple styles and weir boxes. Contact us right away to find out which of our tools matches your operation.

How Long Will My Parshall Flume Last?

Out of all the different flow management tools that you could choose for your system, none provides the versatility and accuracy of the Parshall flume. These flumes can be installed in a variety of applications, and when cared for correctly, should consistently perform the way that you need and deserve.

While there are several questions that people have when thinking about installing a Parshall flume, the most common is how long their flume will last. Unfortunately, there is no simple answer to this question, as the lifespan of a Parshall flume can depend on several factors. Here are a few tips to help you determine your Parshall flume lifespan and advice for making this useful tool last as long as possible.

What’s Your Material?

There are several factors that play into Parshall flume lifespan, but the most important issue is the material from which your flume was constructed. Generally, Parshall flumes will be constructed from stainless steel, galvanized steel, or fiberglass, and each of these materials will have individual lifespans.

Under normal flow circumstances, one of the longest lasting of Parshall flume materials is stainless steel. Stainless steel generally holds up well under tough conditions and should last for multiple decades. However, in applications where corrosion is likely, the lifespan of stainless steel flumes will be shorter.

Fiberglass flumes are nearly as long-lasting as stainless steel flumes, and in many cases, may be the better option. Typically, a fiberglass flume will last for twenty years or more and resists UV damage better than almost any other flume material. Unlike metal flumes, fiberglass flumes are not at risk for corrosion. However, when the flow has grit, it can scrape away the laminate used in fiberglass flumes and reduce their lifespan.

When cost is a concern, many people choose galvanized steel flumes. While they are more affordable than other flume types, galvanized steel flumes have significantly shorter lifespans, and are at high risk for corrosion.

What Causes Corrosion?

If you choose a stainless steel or galvanized steel flume, you should be prepared to deal with corrosion, which can be caused by several factors. For instance, gases in your flow can cause tremendous corrosion, particularly if there is high oxygen content. Hard water, meaning water that contains high mineral content, can also cause corrosion in metal flumes. If you suspect your flume will be exposed to corrosive materials, fiberglass is the best choice.

Regular Maintenance

While there are several threats to the lifespan of your flume, keeping your flume in tip-top shape can be as easy as having your operators perform regular maintenance. Make sure that your operators are frequently checking your flumes for signs of damages and are taking steps to correct his damage when detected. By scheduling regular maintenance, you should be able to boost your flume’s lifespan.

Invest in a Parshall Flume

If you want the longest Parshall flume lifespan possible, your best bet is installing a fiberglass flume, and your top resource for quality fiberglass flumes is Tracom, FRP.

Tracom offers Parshall flumes made from long-lasting fiberglass, meaning the flumes that you purchase from us are sure to last for years to come. Learn more about our products today.

Information About Domed-Top Manholes

If you need to install a manhole in your operation, there are several styles that you could choose. However, in most circumstances, the best option is installing a domed-top manhole.

Domed-top manholes provide a wide range of benefits, including durability and ease of access. That being said, installing a domed-top manhole isn’t always the right choice, meaning it’s a good idea to examine this issue in a little closer detail. Here is some brief information about domed-top manholes that should show you the benefits of these tools and help you decide if they fit your needs.

When You Shouldn’t Use a Domed-Top Manhole

Before we get into the benefits of dome-top manholes, it’s a good idea to take a quick look at the situations where this manhole style is not recommended.

Basically, if you’re installing a manhole in an area where traffic is likely, whether pedestrian or vehicular, you should not use a domed top manhole. The reason for this is very simple: Domed-top manholes will protrude a foot above grade. Because domed-top manholes are elevated above grade, they should only be used in non-traffic areas. Installing this style of manhole in a high-traffic area while exposing your manhole to damage and may threaten the safety of passersby.

Domed-Top Manhole Benefits

Now that you now that you can only use domed-top manholes in an area with no traffic, it’s time to take a look at some of the biggest benefits of choosing this style of manhole.

First and foremost, because the domed-top manhole rises above the ground, it helps prevent water from infiltrating your manhole, meaning that your equipment will be protected from moisture damage. Another big benefit of domed-top manholes is that they provide easy entry and exit for your operators, meaning they can quickly take readings or perform necessary maintenance.

As long as you install your domed-top manhole in the right locations, you should only benefit from this versatile tool.

How the Dome is Attached

If you’re interested in installing a domed top manhole in your system, it’s a good idea to learn a little bit about how the domed-top will be attached to your manhole.

To make sure the domed-top can easily open and close while staying secure, it will be attached to your manhole using a piano hinge made from stainless steel. Generally, this hinge will be connected to a hinge block that is mounted in your manhole. To improve security, many people choose to add a padlock to their domed-top. A gas strut can be used to keep the manhole top open.

Install Domed-Top Manhole

Although there are several manhole top styles that you could choose, none provides you with the versatility of a domed-top manhole. If you want to install a domed-top manhole in your operation, then you need to work with the right manufacturer, which is why you should get in touch with the experts at Tracom, FRP.

In the Tracom catalog, you’ll find almost every flow management tool you could want or need, including manholes with a variety of top styles. Ask us any questions you may have about our fiberglass products and find out how our team can help you.

Important Facts About Weir Box Functioning

When you need to effectively manage and measure flow, there are a variety of tools that you could choose. While most people’s instinct is to choose some style of flume and equally great option is installing a weir box in your system.

Because they offer a variety of customization options, weir box can be built to fit your exact needs, which is important for most water management operations. However, since weir boxes are less well-known than other flow management devices, you might not know why this tool is such an excellent option for managing your flow. Here are a few simple facts to help you learn how a weir box works and advice for buying this device for your flow management needs.

Weir Box Sizing and Flow Condition

To function the way that you need, your weir box must be properly sized. If your box is sized incorrectly, it can negatively impact the accuracy of your readings and the success of your operation. You must be sure that the crest of your weir is the proper height above your weir box floor and that weir notch is placed correctly in the weir pool. You may need to adjust the position of your weir plate to accomplish these goals.

Some weir boxes will need a flow conditioning tool to address turbulent flow conditions. Fortunately, weir boxes can be equipped with an under or over flow baffle that will reduce flow turbulence.

Mounting the Weir Plate

The most important piece of equipment in a weir box is the weir plate. Generally, the weir plate will be installed on a bulkhead in the weir box, and can even be mounted at the end of the box if you’re attempting free spilling discharge. While many weir plates are made of stainless steel, you could also choose a fiberglass weir plate if you want increased durability.

Your weir plate can be constructed with a variety notch styles, including common options such as trapezoidal and v-shaped. Be careful, because the notch style that you choose will have a direct impact on the accuracy of your readings.

Flow Management

Another characteristic that makes weir boxes different from other flow management tools is that flow can enter and exit your weir box in multiple figurations. In some operations, for instance, the flow will rise into the weir box, and in other systems, a pipe will be connected to the weir box so that flow can enter. There are also multiple solutions for having flow exit your weir box, including free spilling discharge or having the flow piped out.

Purchase a Weir Box

Now that you know a little bit more about how a weir box works, you might be interested in installing this dependable flow management tool in your system. If so, then the best way to get the weir box that you need is shopping with Tracom, FRP.

At Tracom, our specialty is connecting our customers with top-notch fiberglass tools, including weir boxes. Whatever your needs in a weir box, you’ll find your perfect match in our catalog. Request a weir box quote today so that you can purchase your perfect flow management tool.