Multi-stage boiler feed pump - has pot-shaped housing and uses cylinder to house impellers and guide elements

摘要

Multistage boiler feed pump having several impellers (1) and guides (2) mounted in a cylindrical housing (3) acting as a guide tube, with the guides sealed against the housing by means of elastic seals (4). The cylindrical housing is thin walled in construction and sealed at the ends against the pot-shaped housing (8), with a narrow assembly gap (9). ADVANTAGE - Boiler feed pump having a housing with smaller external dimensions and in which the impeller components can readily be changed by removing the guide tube.