Question about CFH - cubic foot per hour - on regulator - Home Brew Forums
Register Now For Free!

 Home Brew Forums > Question about CFH - cubic foot per hour - on regulator

01-09-2012, 06:52 PM   #1
Earthson
Recipes

Feb 2010
Edmonton
Posts: 19

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?)

01-09-2012, 11:06 PM   #2
beerman1957

Recipes

Apr 2009
Sierra Vista AZ, AZ
Posts: 211
Liked 3 Times on 3 Posts

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.

01-09-2012, 11:32 PM   #3
TheWall
Recipes

Oct 2011
Midland, Michigan
Posts: 19

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!

01-10-2012, 03:38 AM   #4
Earthson
Recipes

Feb 2010
Edmonton
Posts: 19

Thanks TheWall,

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

 Thread Tools

 Similar Threads Thread Thread Starter Forum Replies Last Post silver02ws6 Fermentation & Yeast 1 08-15-2011 01:45 AM joeybeer Fermentation & Yeast 2 04-06-2011 04:27 AM DannPM Fermentation & Yeast 11 02-23-2011 11:06 PM Newton Fermentation & Yeast 2 09-13-2010 02:48 PM pkincaid Fermentation & Yeast 3 09-03-2010 05:12 AM

 Forum Jump User Control Panel Private Messages Subscriptions Who's Online Search Forums Forums Home Sponsor Showcase     Sponsor Showcase Home Brewing Beer     Beginners Beer Brewing Forum     General Beer Discussion     Fermentation & Yeast     All Grain & Partial Mash Brewing     BIAB Brewing     Extract Brewing     Gluten Free Brewing     General Techniques     Recipes/Ingredients     Equipment/Sanitation     Electric Brewing     Automated Brewing Forum     DIY Projects         Kegerators & Keezers         Brew Stands         Cleaners & Cleaning         Chillers & Stir Plates         Kettles, Mash Tuns & Hot Liquor Tanks         Fermenters     Bottling/Kegging     Label Display & Discussion     Brew Science     Lambic & Wild Brewing     Hops Growing     Home Brewing Photo Forum     Brewing Software Wine, Mead, Cider, Sake & Soda     Winemaking Forum     Mead Forum     Cider Forum     Soda Making     Kombucha & Fermented Tea Forum HomeBrewTalk.com Recipe Database     Homebrew Lager Recipes     Homebrew Ale Recipes     Homebrew Sours & Wilds Recipes     Specialty, Fruit, Historical, Other Homebrew Recipes     Mead Recipes     Wine Recipes     Cider Recipes Home Brew Market     Sampling and Critiquing and Beer Swapping     For Sale     Want to Buy     Group Buys     Homebrew Crowdfunding Food and Beverage     Cheese Making Forum     Cooking & Pairing     Coffee Brewing & Roasting     Meat Smoking, Curing and Sausage Making Home Brewing Community     General Chit Chat     Drunken Ramblings and Mindless Mumbling     Commercial Brew Discussion     Beer Blogs & Articles     Company Reviews Brewing Events & Local Gatherings     North West Homebrew Forum     South West Homebrew Forum     Great Lakes Homebrew Forum     South East Homebrew Forum     North East Homebrew Forum     North Central Homebrew Forum     South Central Homebrew Forum     International