Quote:
Originally posted by bigben2k
The CO pumps have a mechanical seal, to seal the shaft from the housing. I don't think it has anything to do with wether or not they're mag drive plus, as flyingass already stated, he took it apart and found brushes.
What he didn't mention though, is if the shaft drives the impeller directly.
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Yes, it has ALL to do with it.
Mag drive means that the movement of the motor is transferred to the pump impeller by means of magnets, one on the motor rotor and one on the impeller, as in the CM-series.
Sometimes the motor rotor = the impeller magnet, like in the Eheims or other mag drive pumps. There's no physical connection between motor rotor and pumpimpeller.
In case of the CO-series pumps, the shaft of the motor and the shaft of the impellor is the same shaft, and seal is assured by a mechanical isolation joint (= direct driven).
In case of mag drive, it doesn't matter if the motor has brushes, is brushless, or even if the motor is a combustion motor with gasoil...
Sorry if my english seems a little weird...
, it's only my third language (beneath Dutch & French).
CD
