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

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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Steam Basics Part 17: Condensate Pump Discharge Balance Valves

Steam Basics Part 17: Condensate Pump Discharge Balance Valves

Last week we talked about the critical relationship between the steam condensate return temperature and proper pump NPSHR. This week we'll look at the role the discharge balance plays in assuring....

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How To Read A Pump Curve - Part 2

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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