Fluid flow machine

F - Mech Eng,Light,Heat,Weapons – 03 – B

Patent

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103/105

F03B 11/08 (2006.01) F04D 7/04 (2006.01) F04D 29/12 (2006.01) F04D 29/42 (2006.01)

Patent

CA 1330908

ABSTRACT A centrifugal pump wherein the housing defines an annular chamber which is disposed downstream of the impeller and surrounds the shaft seal. The chamber receives a hollow cylindrical or frustoconical shroud which spacedly surrounds the shaft seal and protects it from solid particles in the conveyed fluid. A non-contact type annular seal between the impeller and the housing surrounds the shroud.

602640

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