Waste Oil Burner FAQ Sheet
1. Why is compressed air required?
Waste oil nozzles use air to help atomize heavier oils. Air atomizing produces much finer droplets than conventional pressure atomizing. The oil passage in the nozzle is also much larger which reduces clogging. We do not make onboard air compressors. There is one company that makes them and they are about $400 and may not make enough air for your application.
2. Why is the fuel pump removed?
Waste oil burner nozzles are designed to siphon fuel from a lower level (float tank) using air pressure. They atomize best like this and will provide the best efficiency and lowest emissions.
3. Can I pressure feed the nozzle?
Yes, but, this is a very sensitive adjustment and not easily done under 1gph firing rate. Feeding nozzles with a regulated down pump is terribly inconsistent. Flow rates will change depending on the oil type, temperature, and viscosity. 1/4psi can change your firing rate dramatically and the typical range for this pressure is 0-5psi. ckBurners highly suggests siphon feeding the nozzle. If you must pump feed, a metering pump is much better than reducing pressure on a stock pump.
4. Why do I need a longer blast tube?
This heater block needs to be housed in the blast tube and still have room to get a fuel line down in front of the burner housing in between the mounting flange. If your mounting flange is attached to the housing itself, you will need a new tube and flange.
5. What should I do for a float tank?
Any small 1-3gallon tank will work. You can use any cheap brass float valve but ckBurners suggests a 3/8” so the oil flows easier. An ammo can works great for the tank. The tank CANNOT be sealed, it must have at least a 1/8" hole to vent or leave the lid unlatched.
6. Why do I need at least a 12” deep combustion chamber?
Waste oil has a higher flashpoint, which makes it vaporize and burn slower making the flame longer. Measure from the mounting face to the back wall of the chamber. If there is a long insertion depth to reach a chamber liner, you will need to see a deeper length than 12".
7. Why do I need a new retention head?
Stock oil burner retention heads do not induce enough swirl into the air and fuel mixture for a good burn and flame shape. They also have too much recirculation that makes the oil land on the head and gum up the air passages.
8. What burner will work/will your kit fit my XX burner
Any burner with a 4” O.D. blast tube will work. Beckett AFG and AF burners are the easiest to find and convert. Other burners can be converted but it is not as straight forward, Our retention heads are designed to slip over a 4" outside diameter tube.
9. What if I need more than 225,000 BTU's?
You can pressure feed nozzles with 0-10psi to achieve very large firing rates. However, you may have nozzle drip issues. A delay on the air solenoid closing may be necessary to cut down on nozzle drip.
10. Where can i purchase replacement nozzles or different sizes?
We sell a full selection here at ckburners and they are ALWAYS in stock.
11. What air compressor should i use?
Any compressor capable of 2-3cfm at 4-15psi will work. This includes some air brush compressors, as well as a lot of cheap Harbor Freight models. California Air Tools makes a pretty good product and they tend to be more quiet.