Centrifugal pump operation and characteristics 117
A
B
C
D
F
E
Q – US-gpm
100
100
0
Power %
Regulation
Comparison of
methods
A
=Bypass regulation
B=Valve throttling
C=Hydraulic/hydrostatic drive
D=Mechanical drive
E=Eddy current drive/clutch
F=Variable frequency/speed regulation
Figure 5.26
Comparison of methods of regulation
5.13 Range of pump operation
When sizing and selecting centrifugal pumps for a given application, the pump efficiency
at design should be taken into consideration. The pump characteristics indicate the point
of BEP and its variation with respect to the flow rate Q.
This is an important factor; however, it is almost improbable that the pum ...
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