Page 43 - Centrifugal Pumps 2E
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Impeller Design 29
Figure 3-1. Required performance of new pump.
Step 2: Select vane number and discharge angle.
The desired head rise from BEP to zero GPM is 20% continuously
rising (Figure 3-1). To produce this head rise, the impeller should be
designed with six equally spaced vanes having a 25° discharge angle
(Figure 3-2).
Step 3: Calculate impeller diameter.
From Figure 3-3:
