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Question: Impeller type - cbr (what does it mean?)?

(Posted by: voonchoon on 2009-06-11 01:11:34)

Hello, i have seen some data sheet stating impeller type:CBR Anyone know what it means? Is it referrring to the same thing as RCI (retreat curve impeller)?

Posted by: Technobuff on 2009-06-11, 22:17:06

CBR seems to refer to the seal on the shaft of an impeller pump, that is similar to automotive water pump seals. They seal via a rubber bellows- like arrangement over a pressure spring pressing a carbon flat- faced seal to the rotating impeller face. The lowered pressure at the pump inlet aids in keeping the seal watertight.