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Old 09-24-2012, 02:32 PM   #1
Xpertskir
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Default Medical Regulator wort oxygenation--how many LPM and for how long?

This article has some good info, but medical regulators start at 1 liter per minute and I tend to think that less than 100% of O2 is absorbed when using a 2 micron stone.

http://www.byo.com/stories/wizard/ar...ewing-aeration

What do you flow rate use with your regulator and for how long? The non medical tank users who use a gas flow rate gauge of some sort would also be helpful to hear from.


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Old 09-24-2012, 05:15 PM   #2
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My rule of thumb is 70 seconds of o2 per 5 gal at 800cc per minute and +10% if I am over 1.070 through a .5 micron stone. I'm getting good results with this and am considering moving to 90 seconds at 700 cc per minute to see if I get better absorption rates. I don't have a dissolved oxygen meter so I don't have any way to validate this though.


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Old 09-24-2012, 05:57 PM   #3
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My oxygen tank has a built in regulator with two outputs. 2 and 4 LPM. I use the 2 LPM for about half of my fermenter's volume, which is about 10 minutes. I am using the inline oxy stone from morebeer.com (item FE390 I think)
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Old 09-24-2012, 10:39 PM   #4
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Score. Just realized my regulator has a .12 LPM setting, so I can just double the 45 seconds at .21 in the article and get close to the recommended 8 ppm
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Old 09-24-2012, 11:17 PM   #5
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Hey All,

Good thread. Wyeast has a good Q+A on this topic that can be found at:

http://www.wyeastlab.com/hb_oxygenation.cfm

If you're looking for a good oxygen system for use with a disposable tank regulator they can be found here:

http://morebeer.com/view_product/166...Partial_System

Hope this helps - Cheers!
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Old 09-25-2012, 12:02 AM   #6
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Thanks for that link, that's helpful. I went with this set up http://www.williamsbrewing.com/WILLI...STEM-P496.aspx

They have the regulator as well for the home depot 02 canisters but since I was given a medical one for free with a regulator, it was thankfully not needed.
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Old 09-25-2012, 01:34 PM   #7
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I am running a .5 LPM for 4 minutes with a .5 micron stone.

The rational behind this is that even if I did not get any O2 into solution the headspace is about 2 liters, so it should be fairly saturated. Any more than that and I figure what is not absorbed would just spill out the top of the carboy.

I'm not brewing the same beer enough to adjust the O2 and say if it is better or worse.



Quote:
Originally Posted by Jipper View Post
{snip}

If you're looking for a good oxygen system for use with a disposable tank regulator they can be found here:

http://morebeer.com/view_product/166...Partial_System

Jipper,

How would you recommend someone who is using this system answer the question this thread is about?


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