A centrifugal pump has the performance characteristics of the pump with the 6-in.-diameter impeller described in Fig. 12.7. Note that the pump in this figure is operating at \(3500 \mathrm{rpm}\). What is the expected head gained if the speed of this pump is reduced to \(2800 \mathrm{rpm}\) while operating at peak efficiency?

Transcribed Image Text:

(a) (b) Figure 12.7 (a) Open impeller, (b) enclosed or shrouded impeller, (c) complete pump assembly. (Courtesy of Flowserve Corporation.) 9