Happy HolidaySs Giveaway - Last Sponsor Giveaway of the Year!

Come Enter the BrewDeals/FastFerment Giveaway!


Home Brew Forums > Home Brewing Beer > Fermentation & Yeast > Question about CFH - cubic foot per hour - on regulator
Reply
 
LinkBack Thread Tools
Old 01-09-2012, 06:52 PM   #1
Earthson
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2010
Location: Edmonton
Posts: 19
Likes Given: 1

Default Question about CFH - cubic foot per hour - on regulator

Bit the bullet and picked up a welder o2 bottle today, for aerating wort. I also picked up an argon regular(modded for o2), so I could really dial down the o2 to a reasonable amount.

Problem is that the flowmeter is not psi, but CFH - cubic foot per hour. Starts at 5 CFH and goes up to 40 CFH. I just can't figure out where to set it. Anyone have any experience with this?

The guys at the welding supply shop said to set it at 10. But, I would really like a little more confirmation on the right setting, and time to leave it on.

(I've heard that you can over oxygenate your wort. Is that true?)

Earthson is offline
 
Reply With Quote Quick reply to this message
Old 01-09-2012, 11:06 PM   #2
beerman1957
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
beerman1957's Avatar
Recipes 
 
Join Date: Apr 2009
Location: Sierra Vista AZ, AZ
Posts: 205
Liked 2 Times on 2 Posts

Default

Holy smokes, that sounds like a LOT of 02! I would start at the lowest for sure, but I have never seen this type of gauge. I guess if you have a diffusion stone, it may not matter. 5 minutes of o2 is usually enough for me.

__________________
beerman1957 is offline
 
Reply With Quote Quick reply to this message
Old 01-09-2012, 11:32 PM   #3
TheWall
Feedback Score: 0 reviews
Recipes 
 
Join Date: Oct 2011
Location: Midland, Michigan
Posts: 19
Default

4 CFH (assuming this is not SCFM) can be converted to L/min. According to the book "Yeast" by Chris White and Jamil Zainasheff, at 1 L/min for 1 minute, 20 L of wort (~5 Gallons) will be aerated to ~9.2 ppm O2.

So at 4 CFH * 1 hr/60 min * 28.3 L/ft3 = 1.87 L/min of O2

Run that for about 60 seconds through your wort and you'll be good. If it is SCFM, then you need to adjust for temperature. But you can still find out exact numbers with some calculations.

Hope this helps!

__________________
TheWall is offline
 
Reply With Quote Quick reply to this message
Old 01-10-2012, 03:38 AM   #4
Earthson
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2010
Location: Edmonton
Posts: 19
Likes Given: 1

Default

Thanks TheWall,

I was thinking about a minute on the lowest setting I could. I'll just play around and see what happens


Earthson is offline
 
Reply With Quote Quick reply to this message
Reply



Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
3.5 hour lag time silver02ws6 Fermentation & Yeast 1 08-15-2011 02:45 AM
48 hour starter joeybeer Fermentation & Yeast 2 04-06-2011 05:27 AM
2-3 Hour Starter...right for this situation? DannPM Fermentation & Yeast 11 02-23-2011 11:06 PM
2.5 hour lag ;) Newton Fermentation & Yeast 2 09-13-2010 03:48 PM
44 Hour Primary? pkincaid Fermentation & Yeast 3 09-03-2010 06:12 AM



Newest Threads

LATEST SPONSOR DEALS