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Thread: The wet stuff from an air duster \ compressed air.

  1. #17
    MCRN Tachi Ttaskmaster's Avatar
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    Re: The wet stuff from an air duster \ compressed air.

    Quote Originally Posted by DanceswithUnix View Post
    lol, there was me picturing you with that big compressor feeding a diddly little airbrush.
    Well, I did say paintbrush...

    Quote Originally Posted by DanceswithUnix View Post
    I guess after using the compressor on something like an old computer PSU I'm too busy trying to get to breathable air to worry about brushing off the remnants.
    Err.... You're holding 100 litres of compressed air - Blow the clouds away from you. Failing that, don't point the exit toward your face in the first place...?

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    DDY
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    Re: The wet stuff from an air duster \ compressed air.

    Quote Originally Posted by Ttaskmaster View Post

    Err.... You're holding 100 litres of compressed air - Blow the clouds away from you. Failing that, don't point the exit toward your face in the first place...?
    I can be outside and standing downwind and still have this happen

    https://youtu.be/_4ezPvzKe5M?list=PL...B7B05670F&t=80

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    Re: The wet stuff from an air duster \ compressed air.

    Quote Originally Posted by DDY View Post
    I can be outside and standing downwind and still have this happen

    https://youtu.be/_4ezPvzKe5M?list=PL...B7B05670F&t=80
    Ha ha ha ha. 100% Accurate.

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    DDY
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    Re: The wet stuff from an air duster \ compressed air.

    Ah.

    Of course that would happen if I stood downwind.

    I meant upwind!

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    root Member DanceswithUnix's Avatar
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    Re: The wet stuff from an air duster \ compressed air.

    Quote Originally Posted by Ttaskmaster View Post
    Err.... You're holding 100 litres of compressed air - Blow the clouds away from you. Failing that, don't point the exit toward your face in the first place...?
    That just mixes the huge dust/air cloud even better

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    MCRN Tachi Ttaskmaster's Avatar
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    Re: The wet stuff from an air duster \ compressed air.

    Quote Originally Posted by DDY View Post
    I can be outside
    Yeeeeeeeeeeeah, I think I found yer problem right 'ere, mate......

    Quote Originally Posted by DanceswithUnix View Post
    That just mixes the huge dust/air cloud even better
    Jeez..... OK, everyone bring yer rigs round to my house. I'll dust 'em out for you and teach you bunch of plums how it's done......
    Somebody pick up some milk on the way, though - I'm gonna need extra for all the cups of tea!

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    Senior Member watercooled's Avatar
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    Re: The wet stuff from an air duster \ compressed air.

    A couple have people have basically said this already, but 'compressed air' is NOT COMPRESSED AIR. The most common ones you get now use some sort of hydrocarbon propellant e.g. butane/propane, much like a can of deodorant or pretty much any other common aerosol, with a few exceptions.

    Of course, that sort is flammable and will warn you as such on the can. The other, less common, less-flammable type usually use some form of HFC propellant, basically the same group of substances used as refrigerants in air con etc.

    Whatever they use, it needs to be compressible into a liquid at a pressure manageable by a cheap can at room temperature - that ain't happening with air. So the liquid that escapes is just the propellant that's been forced out, usually due to inverting the can or something, and it will boil off exactly as it does inside the can, to form the gas. Hence why the can also cools down if you use it a lot. Potential concerns with that are it will cool down whatever it's on which could be an issue e.g. frostbite/thermal shock if there's enough of it, and the fact a flammable one will be, well flammable.

  8. Received thanks from:

    wilko (23-11-2018)

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    Re: The wet stuff from an air duster \ compressed air.

    Quote Originally Posted by watercooled View Post
    A couple have people have basically said this already, but 'compressed air' is NOT COMPRESSED AIR. The most common ones you get now use some sort of hydrocarbon propellant e.g. butane/propane, much like a can of deodorant or pretty much any other common aerosol, with a few exceptions.

    Of course, that sort is flammable and will warn you as such on the can. The other, less common, less-flammable type usually use some form of HFC propellant, basically the same group of substances used as refrigerants in air con etc.

    Whatever they use, it needs to be compressible into a liquid at a pressure manageable by a cheap can at room temperature - that ain't happening with air. So the liquid that escapes is just the propellant that's been forced out, usually due to inverting the can or something, and it will boil off exactly as it does inside the can, to form the gas. Hence why the can also cools down if you use it a lot. Potential concerns with that are it will cool down whatever it's on which could be an issue e.g. frostbite/thermal shock if there's enough of it, and the fact a flammable one will be, well flammable.
    Thanks Watercooler for another verbose explanation. Much appreciated.

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    Re: The wet stuff from an air duster \ compressed air.

    Catch your green fingered neighbour with his leaf blower in the garden and ask him for a quick @#$% job. Hehe

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