| 摘要 |
A sanitary positive displacement pump having increased internal clearances to allow increased operating pressures without detrimental wear while maintaining high volumetric efficiency. The invention includes rigid and accurate positioning of the liquid impellers to the shafts while maintaining ease of disassembly and assembly. The impellers are secured on the shafts by cooperating frusto-conical surfaces on each of a pair of nuts. A rubber retainer ring enables manual release of the nuts but prevents inadvertent spinoff.
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