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Old 04-24-2010, 01:25 PM   #1
TheMarquis
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Default Another forgot to purge keg, plus I shook it!

So I forgot to purge my keg after filling it yesterday and I also shook the hell out of it after it cooled down most of the way with 25 PSI on it. I did get pretty close to filling it full so there wasn't that much headspace in it from the beginning. I just went ahead and purged it but I'm afraid the damage is done. Is there hope or anything I should do? Should I take the gas off and keep purging it to let it go flat and start over? It's pretty carbonated (or oxygenated) already.

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Old 04-24-2010, 01:49 PM   #2
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Beer out-gasses CO2 during the racking process, so the headspace will have little oxygen in it. Purging is a good idea, but it is unlikely you'll have a problem.

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Old 04-24-2010, 02:03 PM   #3
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We'll see you in a few days when you asking, "why am I pouring all foam".

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Old 04-24-2010, 02:17 PM   #4
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Quote:
Originally Posted by wildwest450 View Post
We'll see you in a few days when you asking, "why am I pouring all foam".
Because of oxygen being in it or because of the method?
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Old 04-24-2010, 05:02 PM   #5
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Because if the beer was chilled before you carbonated at 25 psi, it will foam. Now, if you carbonated at 25 psi and then chilled it, no problem.

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Old 04-24-2010, 05:05 PM   #6
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Quote:
Originally Posted by david_42 View Post
Because if the beer was chilled before you carbonated at 25 psi, it will foam. Now, if you carbonated at 25 psi and then chilled it, no problem.
out of curiosity ,why?
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Old 04-24-2010, 05:13 PM   #7
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It didn't reach equilibrium with the gas on at 25, so overcarbonation isn't my issue.

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Old 04-24-2010, 05:53 PM   #8
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Quote:
Originally Posted by david_42 View Post
Because if the beer was chilled before you carbonated at 25 psi, it will foam. Now, if you carbonated at 25 psi and then chilled it, no problem.
If I'm in a hurry and shaking my keg to carb, I chill it first, then put about 30psi on it, shake the crap out of it, and repeat 2 to 3 more times. Never have foam problems here. I could see it being way overcarbed if he just chilled it and set it at 25 psi to carb without shaking though.
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Old 04-26-2010, 03:04 AM   #9
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I wouldn't worry about it. Even purging isn't perfect. You pressurize, pull the ring, wait, pull the ring, wait, pull the ring. The whole time CO2 is mixing with "air" and your simply lowering the ratio of the two. It's nearly impossible to get ALL oxygen out of a keg, even with little headspace.

I'm sure it could be argued either way, but unless you plan to leave it in there to age for a LONG time, I wouldn't worry about it.

Drink on! I'm guessing the keg will be empty long before that oxygen gets to your beer. (At least that's been my experience so far)

And shaking a keg is fine. Yea, overcarbing sucks. Don't do that. I sometimes shake to speed up the process. In fact I'll do that next weekend when I take my fresh Irish Stout to FL on vacation. I'm NOT waiting 3 weeks! Just make sure you shake to get close you your desired volumes, but not over. Then let it finish naturally in a day or two.

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What does the primary pressure gauge on the tank tell us? That's right, the temperature. Put it on a scale if you want to know how much is in it...
Put some duct tape over the gauge - Or better yet - Replace the high pressure gauge with a plug - High pressure gauges are useless!

Last edited by SweetSounds; 04-26-2010 at 03:07 AM.
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