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Swiftech 35X and D5 - Page 2

post #11 of 12
Quote:
Originally Posted by Crabid View Post
The general thought behind it is if you are flowing water through faster than the pump you could speed up the pump beyond it's design specs. And while it may not have gears, it will be inducting a current back to coils in the pump, which may in turn shorten its life.

Though as mentioned, it's somewhat harder to do to pumps than fans since they normally run so far below their max flow. In our systems anyway.


To OP
Also, when I said 40%, that was really just picked out the air, I had assumed below that you wouldn't get any flow worth mentioning but I stand corrected! If you get decent flow at 30% go for it. What I had meant by it is not to set it so low it would essentially not be producing any flow.
Quote:
Originally Posted by Martinm210 View Post
No, and if anyone says otherwise...got proof?

I've tested similar mixed pumps many times and don't see how there could be a problem mixing any of those or even DDC + D5.

Many people jump on a misconception that somehow the impellers need to match speeds, but that's not how centrifugal pumps work. The speed of the impeller simply translates energy into pressure energy and P1 at 4000 RPM could care less if P2 is operating at 4000 or 3000RPM.

About the only thing you would want to avoid is having a system flow rate exceed the max flow rate of the weaker pump. That's pretty hard to do with our highly restrictive systems.
To borrow Martin's words...
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post #12 of 12
Quote:
Originally Posted by tsm106 View Post
To borrow Martin's words...
To reuse my words:

Quote:
Originally Posted by Crabid View Post
Though as mentioned, it's somewhat harder to do to pumps than fans since they normally run so far below their max flow. In our systems anyway.
    
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