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Keep in mind...I did not set up the centrifuge to purify the oil for the furnace, I did it so that my diesel equipment would run on it without damage. Being able to centrifuge my furnace oil was just a side benefit. I ran my furnace for years without the centrifuge; the only benefit I have...

I centrifuge the oil separately from the furnace; the setup I built is on a skid and can be moved around my shop. I pump oil from 55 gallon drums into my "dirty" holding tank. When it is full, I start the centrifuge...the oil gravity drains through a couple of 10 micron filters, a series of...

This is very similar to mine: http://wolverinetechnologiesllc.com/centrifugeindex.html I have a small purification plant setup, with two 275gal IBC's, an immersion heater, some magnets, and the centrifuge. I kind of whipped it together as an experiment so the fabrication is a bit crude, but it...

Thanks for the compliments! When I first constructed this furnace, I was not centrifuging the waste oil. I was simply screening it when I pumped it into my holding tank, and then running it through the napa spin on filter and the goldenrod water trap. This method required frequent changes of...

I no longer have the furnace in front of me...but I am fairly certain I used 3/8" line for the feed and return lines, and 1/4" line for the nozzle supply. Yes, no need to worry about constant level any longer. However, I still wanted to be able to preheat the oil with that furnace, so I...

Glad you were able to find a few potential projects! The number of furnaces on CL seems to go up during early winter, but there are always some available around here year round. If you make it down this way, I'm an hour or two west of Portland...shoot me a PM and you're welcome to come check...

Lots of people have asked for schematics! I have never taken the time to draw any up...there are differences from furnace to furnace that would make complete schematics impossible. On the conversions I have completed, I just lay out the components inside of the furnace, and then start wiring...

I am currently running a Napa 1348 simply because it fits 3 of my vehicles and it is cheap. The filter body is pretty small...so I have to change it more frequently than a larger filter. IIRC the filter media is somewhere slightly less than 30 micron...29 maybe? Lots of filters fit the same...

Thanks! My furnace in my shop has been in use for quite a few years now and I have had relatively few problems with it (a few nozzle clogs, a couple of heater elements, and periodic cleaning). The oil pressure in the recirc system is near zero; there is no restriction in the return line, so...

Welcome to the forum! Looks like we have a few firefighters on here...I am the assistant chief on my local volunteer fire department. I concur on securing the source of waste oil first. The first furnace I built about 10 years ago was designed to get rid of my own surplus, no more than...

Sounds like an awesome project! I'd love to see some pics of it when you have it set up and operating... If you're ever up further north on the Oregon coast, send me a message and you can drop by and look at my setup...

I cannot guarantee that all of them will pump waste oil, but I do believe that they will (based on pump design). I have several of the McCann's ones; they seem to be plentiful, relatively inexpensive, and easy to get parts far. Other brand pumps look very similar. One of mine has literally...

Try a carbonator pump...I've had good luck with them over the last few years. I use several of them in my shop for various pumping duties. They are durable and don't require a large air supply. Not as fast as a diaphragm pump, but reasonably inexpensive and they work well with waste oil.

If you're talking about using the pump to move oil from your bulk tank into a siphon tank, I don't think it will work. The first problem is that the pump only runs when the burner is running. The way I have mine wired (and the way I recommend that it be done) is that the float switch prevent...

RonRock has some good advice... It should take about a minute or so for the fan to kick on, and it should run for a minute or so after you shut the burner off. There is likely a schematic sticker somewhere on your machine; I usually see them inside of the blower (lower) door.

Yep; it does. I've run a bit of peanut and rapeseed oil through mine with no problem. I did have to bump up the nozzle temp to make it burn properly, but it did work just fine.

A few things could be happening: the PID controller may not be adjusting for the overshoot (you would need to change timing settings in the controller). If the temp stays high while the burner is running, you may have insufficient airflow through the blast tube (adjust the air shutters), or you...

The element in the nozzle block is a cartridge type heater; it is designed to operate without being immersed in a fluid. Its temperature is controlled by the digital PID controllers; so it isn't allowed to heat up past 180 F.

Excellent video!

Not sure of the exact flow rate; but my shop compressor has 80 gallons of storange, and it runs once or twice every hour. I'd guess the furnace is using around 2 cfm.