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Centrifugal Pump Minute Posts

How to Prevent Pump Cavitation Using NPSHa Calculations

One of the most common phenomena that can lead to damaged centrifugal pumps is cavitation. When your centrifugal pump is cavitating, it can lead to premature seal, bearing or other part failures. In this Centrifugal Pump Minute, we break down how to identify when your centrifugal pump is cavitating and how you can prevent it through consistent pump monitoring
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The Important Role of Shaft Seals on Your ANSI Centrifugal Pump

A leaking ANSI centrifugal pump can create costly, time-consuming repairs and potentially hazardous working conditions, making proper sealing techniques crucial in pump set-up and maintenance. No matter the type, your pump’s shaft seals should be inspected and replaced regularly as part of essential centrifugal pump maintenance. In this Centrifugal Pump Minute, we discuss the importance of shaft seals and the options available for your ANSI centrifugal pump.
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Your Complete Guide to Centrifugal Pumps

Need to understand how to read a centrifugal pump performance curve? Looking to learn about the differences between multiple impeller designs? Ever been curious about the history of centrifugal pumps? You’re in luck! Check out this comprehensive centrifugal pump guide.
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Self-Priming Pumps or Suction Line Check Valves

In an ideal pumping scenario, your pump will always be located beneath the fluid level, allowing gravity to easily feed the fluid into the pump, thus completing the priming process. However, when an application calls for the pump to be located above the liquid level, which of these is a more robust and reliable solution: a) a self-priming centrifugal pump or b.) an end suction pump with a check valve? For the answer, check out our latest Centrifugal Pump Minute.
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Pump Inspection: ANSI B73.1 Centrifugal Pump

Why is centrifugal pump inspection so important? Simple: by following a centrifugal pump inspection process, you can help ensure safe and reliable pump performance. But what does this process involve? Read our Centrifugal Pump Minute for answers.
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Maintaining Alignment on ANSI Centrifugal Pumps

One of the primary causes of centrifugal pump vibration is misalignment, but this can be controlled by monitoring, and – if necessary – realigning the pump and motor shafts. In fact, not only is pump alignment a critical factor in eliminating pump vibration, but it can also help eliminate other pump problems and avoid total pump failure. In this Centrifugal Pump Minute, we provide the steps pump operators should follow to ensure both the pump and motor shafts are aligned.
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Vibration Dangers for Centrifugal Pumps

While smooth centrifugal pump performance is the goal of every operation, occasionally, centrifugal pumps can develop issues that lead to costly downtimes. This includes centrifugal pump vibration, which is one of the clearest signs there’s a problem in the pump system. So, what are the keys to solving vibration and minimizing its hazards? Find out by reading the latest Centrifugal Pump Minute.
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Centrifugal Pump Troubleshooting Guide

After 70 years in the pump industry, we’ve seen a thing or two when it comes to centrifugal pump operations, including common pump problems. That’s why we’ve developed this new troubleshooting guide, which describes some of the common pump issues your operation may encounter, their likely causes, and what to do about them.
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How to Install Cartridge and Component Seals on a Griswold® 811 ANSI Series Pump

Maintaining your Griswold® 811 ANSI Series Centrifugal Pumps is a simplified process thanks to their advanced engineering. Installing or replacing the seals is a particularly crucial part of basic maintenance to avoid fluid leaks, ruptures and other safety hazards. To help make the installation process easier, this Centrifugal Pump Minute provides a quick and handy guide for installing either a cartridge or component-type seal.
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Griswold® Technical Capabilities

At Griswold®, our team of experts makes sure that customers get everything they need out of their centrifugal pumps, and nothing they don’t. How do we do it? By offering the equipment and support customers need to keep operations on track: quality manufacturing, extensive testing, and exceptional customer service. In this Centrifugal Pump Minute, we take a closer look at the technical capabilities that have allowed us to remain on the cutting-edge of centrifugal pump technology for more than 70 years.
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Alignment: ANSI B73.1 Centrifugal Pump

In this Centrifugal Pump Minute, James Farley, Griswold Product Manager, illustrates how to properly align the couplings on a centrifugal pump. Proper coupling alignment is critical to minimizing pump vibration and maintaining reliable performance.
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Vibration: ANSI B73.1 Centrifugal Pump

In this Centrifugal Pump Minute, James Farley, Griswold Product Manager, discusses how high-level vibration can be extremely damaging to the pump, as well as what components are most vulnerable to vibration damage. James also covers detection technology and ways to better analyze vibration effects on the pump.
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Pump Inspection: ANSI Centrifugal Pump

In this Centrifugal Pump Minute, James Farley, Griswold Product Manager, reviews how to perform proper pump inspection for a typical ANSI centrifugal pump. Using the Griswold test lab, James shows the steps and wear points that should be noted during the inspection.
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DOE Pump Efficiency

The upcoming DOE efficiency requirements for pumps will be disruptive to the pump industry and it is important for manufacturers and customers to become prepared. In this post, we are not covering all aspects of the regulation, but highlighting key features and providing good references for gaining a deeper understanding of the requirements.
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How to Measure Total Dynamic Head

In this Centrifugal Pump Minute, James Farley, Griswold Product Manager, discusses total dynamic head, and its importance when assessing a pumps performance in the field. Using the Griswold test lab, James shows the difference in measuring discharge pressure versus measuring differential pressure.
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Operating at Best Efficiency Point

In this Centrifugal Pump Minute, James Farley, Griswold Product Manager, discusses best efficiency point and a good target for efficient pump operation. Using the Griswold test lab, James shows what factors affect pump efficiency, and how to optimize the performance of your pump.
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Affinity Law Impeller Trim

In the first part of this two-part Centrifugal Pump Minute, James Farley, Griswold Product Manager, discusses the pump Affinity Law and how to apply it. James then uses the Affinity Law to estimate a pumps performance when the impeller diameter is changed.
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Affinity Law RPM

In this Centrifugal Pump Minute, James Farley, Griswold Product Manager, discusses the Affinity Law formula that can be used to predict pump performance when changing speeds. Using the Griswold test lab, James provides a real-world example of the accuracy of the Affinity Law.
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Determining available system NPSHA

In this Centrifugal Pump Minute, James Farley, Griswold Product Manager, reviews how to determine available system NPSHA for a pump that is installed and operational. Using the calculation needed to determine NPSHA, James presents example tests that will establish system performance and possible pump cavitation.
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Welcome to the Griswold Centrifugal Pump Minute Blog

At Griswold, we’re known as the global experts in centrifugal pump technology. Personally, we enjoy being known as the industry thought leaders, and believe this reputation sums up our evolution and efforts over the past few decades. However, we also recognize that in order to build on a company legacy that dates back over 70 years, we need to better share our unmatched application knowledge and technical capabilities with the world.
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