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Dry Moly Spray vs Spray Graphite on blower impellers to prevent buildup?

Post in 'The Pellet Mill - Pellet and Multifuel Stoves' started by Don2222, Oct 9, 2012.

  1. Don2222

    Don2222 Minister of Fire

    Joined:
    Feb 1, 2010
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    6,962
    Loc:
    Salem NH
    Hello

    I use TufOil Lubit-8 on all the motor shafts that Imacman recommended and it works great.

    This season I am trying dry moly spray that Stoveguy2esw recommends, on both blower fan blades. The spray graphite I used on the combustion blower last year just about wore off. The spray graphite on the convection blower last year did keep the dust down quite alot. I cleaned off the graphite which contained a small layer of dust embedded in the graphite. The spray moly is a little harder so I expect it may stand up better on the exhaust blower and not embed dust on the convection blower.

    We will see. Anyone else try it?

    See difference in spraying the two on here.


    See dry moly spray on convection blower squirrel cage fan blades below.

    Attached Files:

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  2. Harvey Schneider

    Harvey Schneider Minister of Fire

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    This sounds like a great idea. My first thought though was "Can it handle the flue temperatures?" I took a look at a product data sheet, and it says that it can handle 750F in an oxygen atmosphere and 2000F in an inert atmosphere. The stove flue gases should be oxygen depleted, but probably not oxygen free. The thing that I have no feel for is the temperature of the flue gases. Does anybody know how hot the gases are when they reach the blower? More importantly, has anybody else tried this and does it work?
    I will apologize right now for being a techno-geek. I am a retired engineer, I just can't help myself.
    CtPaul likes this.
  3. Don2222

    Don2222 Minister of Fire

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    Hello Harvey

    The flue gasses on a pellet stove are not as hot as a wood stove. Usually around 300 - 400 degrees.
  4. Don2222

    Don2222 Minister of Fire

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    Hello

    Here is another exhaust blower, I use it on.
    I like to use it to protect the blades. It sure is better than just cleaning the blades!

    Click on pic to enlarge.

    Attached Files:

  5. Don2222

    Don2222 Minister of Fire

    Joined:
    Feb 1, 2010
    Messages:
    6,962
    Loc:
    Salem NH
    Hello

    Got some results in now! Looking good!

    I coated the combustion blower impeller with the dry moly.

    After a few burns, I removed the blower and very little buildup!

    I only had to use a soft bottle brush (instead of a stainless steel wire brush) to clean off the ash and the dry moly was still there!

    See pic with yellow arrows that show small area where I used the bottle brush below!
    I am sold!
    Click to enlarge

    Attached Files:

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