WMO pump to drive centrifuge

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Atlanta, GA
I recently ordered an oil filter type centrifuge from the PA bio guy. Now I need to make it work. The supplier seems to recommend a 1/3-1/2 HP continuous duty motor and a carbonizer pump, which I understand is a vane type pump and used in the foodservice industry (think that's right). Like everything, there are advantages and disadvantages to vane style pumps. My initial thought was "why not use an auto pump?" I know they will make 100+ psi if you shim the bypass. Speaking of that they have a bypass, which may eliminate another part. Gear style pumps do well with high viscosity fluids, like cold oil. Most importantly, I have old (and new) Chevy Melling pumps sitting around in my parts bins.

I bounced the idea of using one of these off the PA guy and he nicely told me that's a pretty dumb idea. I still don't understand why. I was thinking about putting the pump in the drum, attaching to a housing I would fabricate, and putting a driveshaft in the middle of that. The motor would sit on top of the barrel, mounted to (something) and hopefully stay away from most of the heat. That would allow me to hard plumb a lot of the connections using copper or AL tubing, which I think would be nice. The pump would sit in the oil and therefore be well lubricated.

I know a lot of others are using power steering pumps. To me, this seems like a decent idea. I have welders, plasma cutters, even a lathe, so I don't think it will look that bad. The only thing I can think of is I may need to use pulleys to get the pump up to ~3000 rpm. So please chime in - is this a stupid idea?
 

reset2

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I'm thinking engine oil pumps pump a lot of oil. Shouldn't need that much RPMs but just guessing. Do a mockup first.

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coachgeo

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I'm thinking engine oil pumps pump a lot of oil. Shouldn't need that much RPMs but just guessing. Do a mockup first.

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put in a bypass to bleed off oil before centrifuge as a way to regulate the psi. To high psi causes damage.. and also if I understand this right it honestly does not clean as well cause oil gets pushed out to soon with contaminates still in it.
 

Reworked LMTV

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I have a centrifuge, the standard kind. I studied everything I could on these. The PA Biodiesel guy seems to lack an basic understanding of physics. This is my prototype, capable of processing 200-300 gallons a day or so. Have not run the 3116 on any of it yet. Tractor likes it. Looking closely at flash point testing. You really should post process WMO with a filter, like the sock filters from Duda, in case something gets missed.
 

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