Simple Centrifuge
Clean waste vegetable oil (WVO), bio diesel, lube oils, and even hydraulic oil in your garage
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Photo Gallery - This gallery represents the work over several years. Some designs have been replaced and/or updated as time progressed. Most images contain a date stamp visable on the large version. Please note the date when viewing. We are always experimenting with new concepts and designs. If you have any questions about any photo please contact us.
Total photos in gallery 1280 - Latest photo update 2016/07/11 12:37:36
Asterisk(*) indicates new photos in the past 30 days
Adapter 56C to 56J ( 15 )
Algae Recovery ( 42 )
Bacterial fermentation ( 1 )
Balancer Mandrels ( 8 )
Bearing replacement ( 25 )
Botry Culture ( 2 )
Building a gantry ( 16 )
Chestnut Extract ( 9 )
CNC Coolant ( 6 )
Coconut Oil ( 8 )
Construction ( 43 )
Contaminated diesel ( 2 )
Craig's Machine ( 31 )
Cross Drill End Bell ( 10 )
Crude oil ( 5 )
Custom motor shaft ( 23 )
Experimental Motor ( 19 )
Explosion proof motor ( 3 )
Feed Cone ( 29 )
Feed Cone with Fins ( 6 )
Feed Tube ( 3 )
Filter Paper ( 7 )
Ford on WMO ( 2 )
Foundry ( 5 )
Foundry 2 ( 18 )
Gear pump ( 2 )
Grinding fluid ( 19 )
Grinding fluid 2 ( 14 )
Heaters ( 9 )
History ( 11 )
Homemade Diesel ( 7 )
Homemade diesel 2 ( 41 )
Homemade Diesel 3 ( 15 )
Homemade Diesel 4 ( 12 )
How it works ( 3 )
Hydraulic Oil ( 3 )
Keyless Bushing ( 11 )
Lab Centrifuge ( 16 )
Lab Centrifuge 2 ( 18 )
Lapidary Cutting Oil ( 2 )
Lock motor shaft ( 6 )
Magnesol removal ( 6 )
Microwave heater ( 7 )
Misc. Mods ( 4 )
Mitsubishi 4x4 on WMO ( 10 )
New Feed Cone ( 16 )
New Feed Tube ( 7 )
New Rotor 2013 ( 24 )
New rotor design ( 16 )
Oil and Contaminants ( 42 )
Oil Skimmer ( 8 )
Our Shop ( 37 )
Peristaltic Pump ( 29 )
Powder Coating ( 10 )
Renderings ( 8 )
Retrofit rotor for WVOD ( 17 )
Rework Mount ( 10 )
Rotor fins ( 34 )
Rotor Fins One Piece ( 6 )
Seal ( 6 )
Sea Weed ( 4 )
Sediment removal ( 16 )
See thru lid - Building ( 16 )
See thru lid - Testing ( 28 )
Skim Tube ( 56 )
Skim Tube for VCO ( 8 )
Small Settling Tank ( 14 )
Tanks ( 9 )
Tanks - Complete System ( 13 )
Tap drain ( 10 )
Testing Seal Screws ( 6 )
Tests by fuelfarmer ( 22 )
Turn key machine ( 38 )
Two part rotor ( 30 )
Ultrasonic filter cleaning ( 8 )
Updates ( 26 )
Users Machines ( 34 )
Vacuum pickup ( 3 )
VW on WMO ( 7 )
Water-Oil Seperator ( 7 )
Water trap ( 5 )
Wine Clarification ( 4 )
WVO Heat Tests ( 7 )
WVO Pump ( 6 )
WVO Tests ( 14 )
Water-Oil Seperator
Over the years I've thought about adding a weir to allow the centrifuge to be used as a separator to remove oil from water. The flat top rotor makes this modification easy to implement. This is a clear polycarbonate lid with a clear baffle/weir. The gap between the lid and the weir is about a quarter inch. This turned out to be a very interesting experiment. Not easily seen in the photos but it appears the oil is thicker near the top of the rotor vs. deeper in the rotor. It's always interesting to see how fluids continue to behave normally even while subjected to increased gravity.
Any prototype starts with a CAD model. After cutting out the parts on the cnc mill captive nuts were pressed into the weir plate. The lid and the weir plate are separated but some rubber grommets.
Any prototype starts with a CAD model. After cutting out the parts on the cnc mill captive nuts were pressed into the weir plate. The lid and the weir plate are separated but some rubber grommets.
The centrifuge was then turned on and the rotor was filled with clear water. Notice how the spinning liquid forms a vertical wall in the center of the rotor. For this test I'm using a mix of WVO and water. The oil/water mix was slowly added to the centrifuge. The oil separated readily in the center and water escaped the rotor along the weir gate.
The centrifuge was then turned on and the rotor was filled with clear water. Notice how the spinning liquid forms a vertical wall in the center of the rotor. For this test I'm using a mix of WVO and water. The oil/water mix was slowly added to the centrifuge. The oil separated readily in the center and water escaped the rotor along the weir gate.
Notice how the level of the oil is closer to the center of the rotor than the water escape point. This is due to the oil being lighter than the water.    
Notice how the level of the oil is closer to the center of the rotor than the water escape point. This is due to the oil being lighter than the water.    
Numeric Control, LLC
PO Box 916
Morton, WA 98356