No-contact sealing solution for pumps

Bauer Springs has considerable experience in precision blanking and grinding, combined with a capacity for high volume production. This ensures that it is able to supply quality components, held to very close tolerance limits, for use in a wide range of engineering applications where product performance and reliability are paramount.

Christian Bauer, parent company of Bauer Springs, is claimed to be the world's only manufacturer of pump vanes to miniature dimensions. These are produced from high-speed and roller bearing grade steels, in a range of sizes, either with or without notches to suit varying motor radii assemblies.

The clearance tolerances of the vanes moving within the rotor slots present a great production challenge, which involves precision engineering covering evenness, parallelism, and both angular and dimensional stability, together with surface roughness, all to be maintained within the micron range. Rotors are mounted eccentrically within a housing and the vanes, operating with pinpoint accuracy under centrifugal force and spring pressure, create a no-contact seal with the housing so that the pumps run both quietly and with high efficiency.