Avoiding Pump Cavitation in Open Systems: Why Pump Suction Pressure and Water Temperature are Critical

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Avoiding Pump Cavitation in Open Systems: Why Pump Suction Pressure and Water Temperature are Critical

How can you be certain that the pump you select will not cavitate in the system you are designing? By now it should be clear that such certainty is a matter of analyzing the following variables…

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Avoiding Pump Cavitation in Open Systems: How to Determine NPSHA and NPSHR

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Avoiding Pump Cavitation in Open Systems: How to Determine NPSHA and NPSHR

In our previous blog we explained the physics behind that noisy, destructive phenomenon known as cavitation – the result of too little NPSH at the suction of the pump. Today we’re going to dig a little deeper into…

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Avoiding Pump Cavitation in Open Systems: The Dynamic Relationship Between NPSH, Vapor Pressure and Temperature

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Avoiding Pump Cavitation in Open Systems: The Dynamic Relationship Between NPSH, Vapor Pressure and Temperature

Anyone involved in the design or application of fluid pumping systems is familiar with NPSH or Net Positive Suction Head. We typically equate NPSH with one singular question: Is there enough…

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How To Read A Pump Curve - Part 2

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One of the most important lines on a pump performance curve is the Net Positive Suction Head (NPSH) curve.  Discreetly applied either below or above the pump performance and efficiency curves, this single plotted line is the key to avoiding cavitation. Required NPSH or NPSHR for a given pump increases with flow.  So, using the pump curve shown in Figure 1, we can see that the NPSHR for this Model 1510 B & G pump with a 8” impeller and 800 GPM and 33 Feet of Total Head is 12 feet of head. 
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