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Negative pressure for keg transfers?
It seems to me that you could employ a vacuum pump (modified bike pump?) to negatively pressurize a keg for small volume racking where you might otherwise use a positive displacement pump (but don't have one because it costs as much as an automobile). Top cropping yeast and racking from a barrel both come to mind as possible applications. Thin gauge and straight featureless sides on a keg are likely a dealbreaker, but is this a workable system?
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Should work great if you want a keg full of foam.
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Vacuum transfer works fine on non-carbonated beer.
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Why pump at all? Merely using pressure to push is pretty dang common.
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Quite honestly, it never occurred to me to use this on carbonated beer, or for routine keg filling. I agree with Moonlight on this, and I don't generally pump or pull when pushing is an option. I just think there are a few situations where this might just do the trick. Obviously pushing is an option with a barrel transfer, but pulling seems like it might be a bit better to me (of course this would be done under a co2 blanket).
Last edited by Vendetta; 03-06-2009 at 09:21 AM.
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