Centrifugal Pump Minute

Vibration: ANSI Centrifugal Pump

Vibration: ANSI Centrifugal PumpJune 13, 2019

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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Vibration: ANSI Centrifugal Pump

Pump Inspection: ANSI Centrifugal Pump

Pump Inspection: ANSI Centrifugal PumpMay 15, 2019

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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Pump Inspection: ANSI Centrifugal Pump

DOE Pump Efficiency

DOE Pump EfficiencyMarch 27, 2019

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...

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DOE Pump Efficiency

How to Measure Total Dynamic Head

How to Measure Total Dynamic HeadOctober 12, 2018

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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How to Measure Total Dynamic Head

Operating at Best Efficiency Point

Operating at Best Efficiency PointSeptember 12, 2018

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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Operating at Best Efficiency Point

Affinity Law RPM

Affinity Law RPMAugust 9, 2018

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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Affinity Law RPM

Affinity Law Impeller Trim

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 Impeller Trim

Determining available system NPSHA

Determining available system NPSHAJuly 2, 2018

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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Determining available system NPSHA

Welcome to the Griswold Centrifugal Pump Minute Blog

Welcome to the Griswold Centrifugal Pump Minute BlogJuly 1, 2018

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...

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Welcome to the Griswold Centrifugal Pump Minute Blog

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