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Practical Centrifugal Pumps
book

Practical Centrifugal Pumps

by Paresh Girdhar, Octo Moniz
April 2011
Beginner to intermediate content levelBeginner to intermediate
264 pages
8h 24m
English
Newnes
Content preview from Practical Centrifugal Pumps
100 Practical Centrifugal Pumps
The relationships derived above help to establish the characteristics of the pump at
different speeds, once the QH curve at the normal speed N is known.
The relationships derived are based on a major assumption that the efficiency remains
constant when transferring a point on one characteristic to the homologous point on
another characteristic.
The results obtained by these equations often differ from the values obtained in practical
application. The difference becomes larger when the speed change is more than ±25%.
Let us consider a point P
2
on the QH curve-c in Figure 5.8. The homologous points
P and P
1
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Publisher Resources

ISBN: 9780080480145