Multistage centrifugal pump has casing pipe, which comprises multi-stage pump body, which is surrounded under formation of flow guided annular space by casing pipe

摘要

The multistage centrifugal pump has a casing pipe (7), which comprises a multi-stage pump body, which is surrounded under formation of flow guided annular space by the casing pipe. Two pump elements are provided, in which the casing pipe ends (8,13) are arranged by radially adjacent sealing rings in a sealed manner. The casing pipe ends are calibrated in a matrix (14) in the area of the sealing surfaces (15,16) by radially force-effected cam follower on a sealing surface diameter.