Casings And Diffusers

The Volute Casing Pump This pump (refer to Figure 1) derives its name from the spiral-shaped casing surrounding the impeller. This casing section collects the liquid discharged by the impeller and converts velocity energy to pressure energy.

A centrifugal pump volute increases in area from its initial point until it encompasses the full 360° around the impeller and then flares out to the final discharge opening. The

FIGURE 3 Horizontal single-stage double-suction volute pump (the numbers refer to parts listed in Table 1) (Flowserve Corporation)
TABLE 1 Recommended names of centrifugal pump parts

Item no.

Name of part

Item no.

Name of part

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