MULTISTAGE CENTRIFUGAL PUMP

摘要

A multi-stage centrifugal pump which includes a plurality of stages the impellers of which are mounted on a shaft common to all stages. All the stages are mounted within a tie-frame carrying pump inlet and delivery connections and are arranged between an inlet end member and a delivery end member. The end members and the casings of each stage are arranged in abutting relationship so that they are urged in a direction towards the inlet member by the delivery pressure acting on a combination of a delivery end cover and the delivery end member, the inlet end member being held against movement relative to the tie-frame while the delivery end member is capable of movement relative to the tie-frame, sealing means being provided between the tie-frame and the movable member.