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 1296 - Latest photo update 2021/12/10 18:48:01
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 ( 8 )
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 ( 47 )
Oil Skimmer ( 8 )
Our Shop ( 37 )
Peristaltic Pump ( 32 )
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 )
Sight Glass ( 6 )
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 )
 Small Settling Tank
The oil we burn here in the machine shop always has a bit of water that has settled to the bottom of the drums. In time I'm faced with the task of dealing with several gallons of mix. In the past I've setup the skimmer to strip the oil from the water but I wanted something faster. So a while back I picked up a scrap expansion tank from a steam system. It's 5 feet tall and 12 inches in diameter and holds about 30 gallons. Perfect for this task.
Here is the tank ready to be modified. Started by using the band saw to cut off the bottom end bell so I can flip it around. After cutting, I tacked some angle iron to the end bell and drove it out of the cylinder.
Here is the tank ready to be modified. Started by using the band saw to cut off the bottom end bell so I can flip it around. After cutting, I tacked some angle iron to the end bell and drove it out of the cylinder.
This is the end bell removed. Next the end bell was bored and faced in preparation for the bung to be welded on. Bung was welded onto the end bell on the rotary table.
This is the end bell removed. Next the end bell was bored and faced in preparation for the bung to be welded on. Bung was welded onto the end bell on the rotary table.
After some time I was able to install the end bell into the cylinder in the desired orientation and welded it on using the rotary table. After welding was completed the tank was evacuated of all the air and hydrostatically tested using the garden hose. This isn't a pressure vessel but 50 psi water finds leaks in a hurry. All the welds were sound but there was a crack from one of the tack welded pieces I used to drive the bell square. Quickly welded the leak and re-tested. Held and leak free.
After some time I was able to install the end bell into the cylinder in the desired orientation and welded it on using the rotary table. After welding was completed the tank was evacuated of all the air and hydrostatically tested using the garden hose. This isn't a pressure vessel but 50 psi water finds leaks in a hurry. All the welds were sound but there was a crack from one of the tack welded pieces I used to drive the bell square. Quickly welded the leak and re-tested. Held and leak free.
I then welded on some angle iron legs and an eighteen inch disk for the base. This will allow me to move it around by rolling like a bottle. Note the plugs in the valves, just in case. Nobody likes leaks. Remove when needed. Too easy to bump a valve in a busy shop. This is a view looking down. With the legs it's 6 feet tall and requires a step ladder to fill. Cut a 2 inch hole in the top with a hole saw. The inverted end bell serves double duty as a funnel.
I then welded on some angle iron legs and an eighteen inch disk for the base. This will allow me to move it around by rolling like a bottle. Note the plugs in the valves, just in case. Nobody likes leaks. Remove when needed. Too easy to bump a valve in a busy shop. This is a view looking down. With the legs it's 6 feet tall and requires a step ladder to fill. Cut a 2 inch hole in the top with a hole saw. The inverted end bell serves double duty as a funnel.
After filling the tank with all the mixed oil I had on hand I let it sit for a few days before cracking the valve and draining the water. I ended up draining about 7.5 gallons of water from the 20 or so gallons of mix I started with. The water is very rusty and this is due to the tank. If you would have seen how dirty I was the day I built the tank... you'd understand. ;)  
After filling the tank with all the mixed oil I had on hand I let it sit for a few days before cracking the valve and draining the water. I ended up draining about 7.5 gallons of water from the 20 or so gallons of mix I started with. The water is very rusty and this is due to the tank. If you would have seen how dirty I was the day I built the tank... you'd understand. ;)  
Numeric Control, LLC
PO Box 916
Morton, WA 98356