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................................ Special Applications

Figure 8.2: Typical non-clog pump (Reproduced with permission of Flowserve Corporation)

This type of pump defies the normal design custom on a centrifugal
pump of having the discharge being one size smaller than the suction.
In spite of the focus on the solids size in the selection and purchase of
pumps for municipal waste, the major problem in these pumping
applications tends to be the stringy material. This material can invade
the eye of the impeller, wrap itself around the shaft nut, and eventually
clog the pump.

8.1.3 Pipelines and mines
These applications usually require very large pumps that are subjected
to high levels of abrasive wear of different types.

9 Gouging abrasion occurs when coarse, angular particles tear
fragments of the wearing surface.

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