Wastewater treatment plants have complex systems that rely on a number of components to function...
Check valves are among the most widely used valves in industrial systems today, yet they’re often misunderstood. We’ll cover how they work, where they shine, and the pros and cons you need to know to make the most of them.
Why Use Check Valves?
The primary job of a check valve is to prevent the backward flow of fluid. Without them, pumps and equipment are at risk of serious damage, and fluid could end up in places it absolutely shouldn’t—creating costly problems. If you value the longevity of your system and the reliability of your equipment, this simple valve becomes an essential piece of the puzzle.How Do Check Valves Work?
Check valves are remarkably straightforward in their design. They operate automatically, opening and closing in response to fluid flow. When fluid flows in the right direction, the valve’s internal component (a disc, ball, or flap depending on the model) opens to allow the passage of fluid. When the flow stops, or worse, reverses, the valve slams shut, preventing the unwanted backflow.
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Prime Applications
Check valves aren’t just one-trick ponies—they’re indispensable across various industries and applications, including:
- Water and wastewater treatment
- Injection lines
- Washdown systems
- Cooling towers
- Boilers
- Condensate lines
- …and many more.
Wherever flow direction must be controlled, you’ll likely find a check valve doing its job quietly behind the scenes.
Advantages: Why They’re So Great
The genius of the check valve is that it requires no external power to do its job. It operates automatically, so even if your facility loses power, the valve will keep functioning—shielding your pumps and other equipment from damage and preventing the dreaded backflow disaster.
Disadvantages: The Flipside
Check valves can be prone to some common issues, such as:
- Noise: The distinctive "slamming" sound when they close.
- Water hammer: A sudden pressure surge when the valve shuts.
- Reverse flow: If not properly sized or selected, check valves can let fluid flow the wrong way.
Now, here’s where things often go sideways: Check valves are sometimes incorrectly sized or used as an on/off switch, which can lead to premature wear, excessive pressure drop, and inefficient pump operation. This leads to wasted energy, higher operational costs, and more maintenance—none of which are good for your bottom line.
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Bottom Line: Choose Wisely
In short: Check valves are simple yet vital, but only when they’re properly selected and applied. Get it right, and you’ll have a hardworking valve that quietly keeps your systems safe and efficient. And don’t just wing it… Reach out to one of our engineers who understands the nuances of valve sizing and selection.
Professional Pump, a leading distributor of pumps and valves in Michigan and Northwest Ohio, can assist you with a well-chosen check valve that will improve your system’s performance, reduce downtime, and ultimately save you money.
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