A centrifugal pump adapted to pump a solid/liquid mixture, comprising:

An impeller rotatable about an axis, Instrument Manifolds said impeller having a suction side and a gland side; a static volute, said impeller being adapted to rotate inside said static volute: a plurality of raised vanes on the suction side of said impeller, Filterwherein the clearance between said vanes and said static volute is greater than the predicted size of the largest solid particle in a normal design particle size distribution of said solid/liquid mixture; and axially adjustable sealing means adapted to reduce or substantially eliminate the clearance between the rim at the eye of said impeller and the extended inlet spout of said static volute, FILTER SERIESwherein said sealing means comprises a substantially annular member at least partially housed within an annular slot or recess in said static volute.

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2011-11-30

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