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Thread: Compressed air Vessel. Moisture?

  1. #1
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    Default Compressed air Vessel. Moisture?

    Now I need all the wisdom out there. As far as I know when a vessel is pressurised no moisture can be formed inside. What about the physics behind this.
    Why is moisture formed when the vessel become empty. Come on guys, let us discuss this.
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  2. #2
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    Well goose, it would appear that condensation is the culprit! info can be found at http://extorian.co.uk/shooting/care.html Check out the "lubrication" section.
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  3. #3
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    Goose , when they pump air they say it is dry.But as we all can guess the fact is it is not 100% dry.
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  4. #4
    Protea FT Team '08

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    [quote1199279636=goose]
    Now I need all the wisdom out there. As far as I know when a vessel is pressurised no moisture can be formed inside. What about the physics behind this.
    Why is moisture formed when the vessel become empty. Come on guys, let us discuss this.
    [/quote1199279636]
    Speak to John next time you see him.he will tell you all about compressed air and moisture.
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  5. #5
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    by turning normal air into High Pressure air does not make it clean or dry by any means
    It depends on the filters that are used !
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  6. #6
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    Carry on guys, i think the answer is still out there.
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  7. #7
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    When air is compressed, the amount of water vapour that it can hold is reduced, hence any excess condenses in the compressor, in scuba compressors this excess is drained away through a valve as part of the filtering process. Hence the air in your scuba tank will contain a minute frayion of water vapour, however as soon as the pressure drops slightly the airs storage capacity increases, and the chances of the air becoming saturated and forming condensation are minimal.
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  8. #8
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    Thanks Gra, I can see the logic in that. It make perfect sense. So that's why it's recommended to keep your bottle and rifle charged. But now, that's the first part. Why is it that when the cylinders become empty, condensation starts again?
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  9. #9
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    When the compressed air in the storage cylinder is used up the temperature inside is reduced. This causes condensation to form inside the storage cylinder. This info is from the link I posted.
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  10. #10
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    Thanks Andrew, i'm happy now. You really gave it to me this time.
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  11. #11
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    Hee Heeeeeeeeee! at least we both now know what the cause of the problem is
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