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Old 11-24-2010, 03:09 AM
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Default Centrifuge RPm

Is the only reason for high RPM (6000) flow rate. or can you get the same cleaning from 3450 rpm at a lower flow rate

Thanks Kevin
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Old 11-28-2010, 04:49 AM
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6000 rpm puts more g-forces on the oil leading to the ability to run faster rates of oil flowing thru the CF. I've noticed that my 3 phase motor draws less amps of power from the FVD inverter when spinning the CF at 6000 rpm, and I've still been running the same flow rates as I would have at 3450. Running about 1 amp of power draw at 6000rpm, vs the 2.4 amps of draw at 3450, so I use less power while spinning faster:-)

I also usually make a second pass to my oil at significantly higher flow rates like 20gph, but really a single pass at 5 to 10 GPH @ 6000 rpm gives me oil that won't clog 1 absolute bag filter.
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Old 11-28-2010, 06:07 AM
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There is overkill to anything. At 3500 rpm and 8 gmh, I am seeing very good results.
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Old 11-28-2010, 01:30 PM
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Quote:
Originally Posted by 02ShortFatbottom View Post
Is the only reason for high RPM (6000) flow rate. or can you get the same cleaning from 3450 rpm at a lower flow rate

Thanks Kevin
Yes.

More RPM's theoretically allows more through-put with same results. The reason I got a CF was to filter higher volumes faster. I have a 6000rpm CF.

There has been some discussion about 'splashing' with CF's. This is where the oil introduced to the CF hits the 'wall' of oil in the rotor and splashes some potentially dirty oil out of the rotor into the 'clean' area. I know Bruce and Clay have modified their rigs to mitigate this. If you look at Simple CF's 'feed cone' you can see where they have addressed this issue.

It's logical the 6k rpm CF would be more susceptible to splashing. Clay might be right...
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Old 11-28-2010, 06:13 PM
Clay Clay is offline
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Quote:
Originally Posted by skyskijason View Post
It's logical the 6k rpm CF would be more susceptible to splashing. Clay might be right...


Yes, If I run faster than 8 gph i see more splashing. there more than likely is a way around that but hey, I got time to wait as 8 gph comes out clean and dry.
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Old 11-30-2010, 02:54 PM
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Basic 3450 115V motor is pulling 6amps = ~690 watts of power
3 phase motor running from 230v inverter @ 3450 is pulling 2.4amps = ~764 watts
3 phase motor running from 230V inverter @ 6000 shows pulling 1amp = ~318 watts

So running 6k the motor is more efficient and uses less power by more than half. Course the numbers from the inverter could be lying to me, but it tells me how many amps its supplying to the 3 phase motor.

3ph motor brand new cost me $60 shipped and the inverter was $70 shipped and though it said it was used, I didn't see a mark on it. Looked new to me.


Feeding the oil behind the oil wall in the bowl means you never have the incoming oil mixing with the oil trying to exit the bowl, and you will not have any splashing regardless how fast you want to run your oil. Granted I still run slower speeds, cause I que up 275 gallons at a clip and I sell a good amt of oil so I want to be 100% sure it is clean/dry as it possibly can be.


I'll prolly end up buying a Simple CF without a motor sooner or later and just using my 3phase on it since that I feel would produce prolly the best/fastest cleaning CF on the market.
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Old 11-30-2010, 06:17 PM
Clay Clay is offline
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3 phase is more efficient no doubt. But how many average Joes have 3 phase wigint in there garage or shop?
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Old 12-04-2010, 09:02 AM
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I don't have 3phase in my garage. But for $40-$115 there is this nifty box that is called a VFD inverter that gives you 3 phase power from a 115v line or 230v line. I have a 230v 10ga extension cord running to my garage and that powers my CF via the three phase VFD. I can run at any speed I'd like, though I find 6000 is the best since it is more efficient power usage wise.

I recently figured out a bit of a problem that's been plaguing me about oil pooling in the CF and not running out the hose and I've been able to ram up to 12gph an hour and my oil is coming out as clean and dry as it was at 5gph. Plan to push a little faster and see where the "break" point is, but at 6k and piping a little positive pressure air from the motor's fan thru the CF I get awesome de-watering coupled with insanely clean oil fast.

I only wonder how much better a simple CF with a 6000 rpm motor would be I needs me one of those.
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