Multi-stage pumps

Full Title

Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (F04D21/00 takes precedence) > Centrifugal pumps > for compressing or evacuating > Multi-stage pumps

3 direct subcodes

Child Classifications

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F04D 17/122
F04D 17/127
F04D 17/14 with means for changing the flow-path through the stages, e.g. series-parallel, e.g. side-loads, (surge control F04D27/02)