Bag squeezing and adjusting grain absorption ratio?

[MattyIce]

How are you guys adjusting from the normal gran absorption ratios if you squeeze or drain for prolonged periods of time?

 

[Oginme]

I measure the volume of water in and the wort collected. Correct the wort volume for the temperature expansion (about 2.5% at 154F) and the difference is the amount of wort left with the grain. Divide this my the weight of grain to get a factor of volume per unit weight of grain.

 

[chickypad]

I find I get .125 gal/lb absorption on my regular mash tun and .08 to .09 gal per lb with BIAB depending on how hard/long I squeeze. Sounds like some guys go as low as .05-.06 but I'm not that strong or that patient.

 

[chisena]

I find that if I squeeze my bag gently over prolonged periods of time, I get maximum extraction....

 

[chickypad]

You guys and your bags. It never ends.

 

[pricelessbrewing]

How are you guys adjusting from the normal gran absorption ratios if you squeeze or drain for prolonged periods of time?

Change 0.125 gal/lb to something else, like 0.08 or 0.04 even for some people depending on their setup. I stick to 0.08 and always end up within .1 gallons of my targeted final volume.

 

[TexasWine]

Change 0.125 gal/lb to something else, like 0.08 or 0.04 even for some people depending on their setup. I stick to 0.08 and always end up within .1 gallons of my targeted final volume.

I'm right around there too. 0.07 gal/lb.

 

[MattyIce]

Thanks for the replies, gents.

 

[chickypad]

Thanks for the replies, gents.

And girls?

 

[chisena]

And girls?

Do you squeeze bags too?

 

[Gavin C]

~0.045 gallon/lb is my setting in beersmith

 

[OzzyBrew]

I don't squeeze, nor do I do any sort of sparge. My process is simple, I brew in a bag. Using my wilser bag and hoist I simply raise the bag out of my wort, and let it gravity drain as I bring my wort to a boil. I don't crush too fine, but I have started mashing for 75 minutes. That gets me to about 75% eff....so I'm happy with that. No need for a flour mash or sparge.

 

[shetc]

I admit it , I always squeeze my bag, I can't stop myself.

 

[hopkincr]

I squeeze and squeeze, etc. I use the SimpleBIABCalculater (and have used the Priceless one as well), and that "corrects" for squeezers.

 

[MattyIce]

I have used .08 for my last couple batches. It has been pretty darn close.

 

[jason.mundy]

I don't squeeze, nor do I do any sort of sparge. My process is simple, I brew in a bag. Using my wilser bag and hoist I simply raise the bag out of my wort, and let it gravity drain as I bring my wort to a boil. I don't crush too fine, but I have started mashing for 75 minutes. That gets me to about 75% eff....so I'm happy with that. No need for a flour mash or sparge.

A lot of the points that OzzyBrew brings up are the reason why I do BIAB. I do it to reduce steps, reduce time, and reduce worry.

When the mash is done, I pull the bag and let it drip into the kettle while I come up to a boil. I try not to fiddle with it. My wort volume is what I collected. I compare that to what I expected.

If I routinely guess low, then I'll adjust my calculations to make my guesses more accurate... I'd rather do that than keep burning my hands or introducing new equipment/variables to get that last bit of wort out.

 

[hafmpty]

I don't squeeze, nor do I do any sort of sparge. My process is simple, I brew in a bag. Using my wilser bag and hoist I simply raise the bag out of my wort, and let it gravity drain as I bring my wort to a boil. I don't crush too fine, but I have started mashing for 75 minutes. That gets me to about 75% eff....so I'm happy with that. No need for a flour mash or sparge.

When the mash is done, I pull the bag and let it drip into the kettle while I come up to a boil. I try not to fiddle with it. My wort volume is what I collected. I compare that to what I expected.



If I routinely guess low, then I'll adjust my calculations to make my guesses more accurate... I'd rather do that than keep burning my hands or introducing new equipment/variables to get that last bit of wort out.

This is my plan. Want to quote this so I remember and can find it easily.