Gear-pump pressure nozzle burner

Discussion in 'Burners and their construction' started by PatJ, Jun 9, 2019.

  1. oldironfarmer

    oldironfarmer Silver Banner Member

    Looking good!
  2. PatJ

    PatJ Silver Banner Member

    I am confident that this burner will work since it is used extensively in commercial heating units.
    There are some examples on the other forum of people using them to melt metal, and it seems like there were several in use, and it was quite popular for a while.
    I am not sure if there are examples of combo units posted here.

    This will not be a combo unit.
    I want the pump and motor well away from the furnace.

    I am stuck under a tsunami of work right now, so there is no prospect of making any progress on this for a while.
    This is going to become my main burner though as soon as I get it completed.
    No more air compressor for me.

  3. OMM

    OMM Silver Banner Member

    Pat, this is what I’m really looking forward to!

    you have ultimately got rid of compressed air and maintain an open vessel to keep adding fuel...

    I am curious to know how much does your pump station weigh?
  4. Jason

    Jason Silver Banner Member

    Hey Pat.... The only issue I ever had running the compressor on my burner was once it failed to kick back on. I was running the furnace for about 15minutes and noticed I hadn't heard the compressor. Seems some lame brain forgot to flip the circuit breaker back on... Wonder who that could be?:oops:

    I would like the freedom from the hose across the ground. I have bad dreams about dropping a hot tool on that hose and the carnage it would cause!:eek:

    I'm with OMM... I do like being able to add fuel without shutting down. I can do that now.
  5. OMM

    OMM Silver Banner Member

    Jason, I love your set up, but I’d like to refine it. I don’t know if it is possible. But I will give it a try. I have an air compressor that weighs maybe 500 pounds and 5 hp with 17 CFM with a max of 155 psi.

    I am super interested in simplifying this is....pressurizing the fuel with out a pressurized vessel. I consider this very interesting.
  6. PatJ

    PatJ Silver Banner Member

    I oversized the motor (I used a 1/3 hp motor), and so it is a bit heavier than necessary.
    I would guess my pump/motor combination will weigh 40 lbs max., perhaps 30 lbs.
    The gear pump weighs almost nothing; perhaps 5 lbs.

    My pressure switch has stuck on my air compressor twice.
    I heard this bad noise that sounded like the belts slipping and the compressor locking up, and I ran into the shop and saw the air gauge way above the setpoint, perhaps up to 175 psi.
    The safety valves were not going off, so I must have been just below their setting.

    I have a good air compressor, but am tired of watching it and making sure it works correctly.
    And I don't want to have to buy another one some day.
    The gear pump and motor are cheap compared to the price of a good air compressor.
    I forget the exact cost of these items, but you can find them on ebay.
    The gear pump was maybe $100.00.
    The motor was about $100.00 if I remember correctly, and a smaller one (smaller than 1/3 hp) would work and would be cheaper.

    Last edited: Jun 17, 2019
  7. OMM

    OMM Silver Banner Member

    I am applauding you for trying something new/Different. If I went with the motor pump, I would probably go with DC three phase. You are where you are. I look forward to your testing.
  8. PatJ

    PatJ Silver Banner Member

    But its really old-school stuff.
    These things have been around since I got on the forum back in 2011 or so, and were on the forum long before I came along.

    The only thing I have done is separate the pump and motor from the burner tube and nozzle, and I would guess I am not the first to do this either, but I can't point out an example at the moment.

  9. OMM

    OMM Silver Banner Member

    My old household furnace ran a very similar tip (red fuel). I do believe you’re running waste oil???
  10. PatJ

    PatJ Silver Banner Member

    No, I run diesel, but at some point I will have a two tank setup, and will start on diesel and then switch to waste oil (via a 3-way fuel valve).

    I found several people on the old forum who used the home heating units with a foundry.
    I cannot find anyone who made up an arrangement with a remote pump and motor though.

    Here are a few videos I found.

    He has a propane bottle way too close to the flame/furnace for my comfort.
    Those things will explode if overheated.
    The propane is not necessary for a diesel start. Not sure about a waste oil start.
    I don't like the electronic igniter, since that is just one more thing to break, and is not required.
    Last edited: Jun 17, 2019
  11. PatJ

    PatJ Silver Banner Member

    Here is a combo unit from A to Z.
    The part about the nozzle starts at 11:40.
    I won't be using the electrodes, but I will use a return oil line which will connect to the side of the nozzle adapter (they do not use a return oil line in this video).

    Last edited: Jun 17, 2019
  12. PatJ

    PatJ Silver Banner Member

    A video on a pumped nozzle spray pattern.


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