Hi guys!
New on the forum.
A even cheaper solution is to make yourself a bag. I made a spreadsheet after the formulas of a biabrewer member that is very useful.
The second spreadsheet is for a simpler bag, not a fustrum one.
Quote from: bionut on October 14, 2013, 05:14:36 PM
Hi guys!
New on the forum.
A even cheaper solution is to make yourself a bag. I made a spreadsheet after the formulas of a biabrewer member that is very useful.
The second spreadsheet is for a simpler bag, not a fustrum one.
Not everyone, in fact most won't have, an overlocker or the necessary skills. But yeah nothing wrong with making your own.
Sent using a complex system of semaphore and ninjas.
You don't need an overlocker to do it. A regular double stitch will work. Mine was sewed by hand, so you don't even need a sewing machine :D
If you do not have the money to buy a custom one you can make it fairly easy.
Welcome to the forum bionut.
Cool spreadsheets, thanks for sharing. You can't beat geometry and excel :P
What material do you need to make one of these bags? And do you need special thread?
Use Swiss voile curtain material and nylon thread. Natural fibres will rot.
Sent using a complex system of semaphore and ninjas.
so long as ye appreciate the potential weight of the grain bag after mashing 6-10 kg of grain...pretty difficult to lift.......like lead ;)
Thanks Eoin :))
The ones on your website look the berries btw O0
The wet weight of my own brew bag is about 25kg. They really need to be strong. I've tested our seams and was unable to tear them apart by hand, this is where an overlocker is preferable. It's a dangerous business drawing a wet bag at 65c. The massive pressures come from twisting the bag to squeeze it, but this is an essential element of BIAB if you ask me. I had one of the early bags fail in this phase once, then changed to the looped design to take the pressure. It was actually a drawstring that failed because of twisting, none of the seams failed. If you're doing your own and your grain bill is over ten kg, be very careful.
Sent using a complex system of semaphore and ninjas.
Thanks for the kind welcome :)
Yes you need swiss voile (simple voile, white) and polyester thread. Can't be simpler than that. I will post some pictures of my hand sewed bag in a few days.
Quote from: bionut on October 14, 2013, 08:38:33 PM
Thanks for the kind welcome :)
Yes you need swiss voile (simple voile, white) and polyester thread. Can't be simpler than that. I will post some pictures of my hand sewed bag in a few days.
Do you twist your bag to squeeze it out? If so, how do you do it safely? My process still needs some type of hoist to lift my bag safely.
Sent using a complex system of semaphore and ninjas.
Quote from: Eoin on October 14, 2013, 08:36:37 PM
The wet weight of my own brew bag is about 25kg. They really need to be strong. I've tested our seams and was unable to tear them apart by hand, this is where an overlocker is preferable. It's a dangerous business drawing a wet bag at 65c. The massive pressures come from twisting the bag to squeeze it, but this is an essential element of BIAB if you ask me. I had one of the early bags fail in this phase once, then changed to the looped design to take the pressure. It was actually a drawstring that failed because of twisting, none of the seams failed. If you're doing your own and your grain bill is over ten kg, be very careful.
TT
Sounds that i need to find a taylor to make my bag stronger :) until then i will work with what i have...
Quote from: Eoin on October 14, 2013, 08:41:58 PM
Quote from: bionut on October 14, 2013, 08:38:33 PM
Thanks for the kind welcome :)
Yes you need swiss voile (simple voile, white) and polyester thread. Can't be simpler than that. I will post some pictures of my hand sewed bag in a few days.
Do you twist your bag to squeeze it out? If so, how do you do it safely? My process still needs some type of hoist to lift my bag safely.
TT
You can squeeze it in a bucket and then pour the squeezed wort back in the kettle ;) I forggot to mention that my bag is hand stiched 3 times, so is strong enough... i will try to stitch it the right way though...
Quote from: bionut on October 14, 2013, 08:45:20 PM
Quote from: Eoin on October 14, 2013, 08:41:58 PM
Quote from: bionut on October 14, 2013, 08:38:33 PM
Thanks for the kind welcome :)
Yes you need swiss voile (simple voile, white) and polyester thread. Can't be simpler than that. I will post some pictures of my hand sewed bag in a few days.
Do you twist your bag to squeeze it out? If so, how do you do it safely? My process still needs some type of hoist to lift my bag safely.
TT
You can squeeze it in a bucket and then pour the squeezed wort back in the kettle ;) I forggot to mention that my bag is hand stiched 3 times, so is strong enough... i will try to stitch it the right way though...
Not knocking it man, in the spirit of homebrew we're DIY types :-)
I'm just trying to pass on my experience with the materials and their tolerances.
Sent using a complex system of semaphore and ninjas.
Ooo, i have to mention also that i am a newbie brewer, so i don't use a lot of malt for a 20 L beer. Next time i will weight the wet bag to see how much it holds.
Quote from: Eoin on October 14, 2013, 08:36:37 PM
The wet weight of my own brew bag is about 25kg.
25kg :o I've got a heap of old coal bags, would they do :P
My boiler is 70l, my grain bill is about 13kg dry for a normal gravity beer.
Sent using a complex system of semaphore and ninjas.
well a kg grain will weigh another kg when wet... so Eoin has his hands full liftin his brewbag...Id say he has a winch screwed to the ceiling beams :D
serious though even a normal English bitter 40 pint brew will have nearly 10-11 kgs in the bag........so make ur bags strong enough.
Tip from me... test ur grain bag with wet sand ( 2 euros from the local builders shop) if u can swing that around without signs of tearing or stitch stress ur grain will hold.
hate to hear any of ye had an effed brew day and a big clean up with sticky grain everywhere ;)
Quote from: Il Tubo on October 14, 2013, 09:11:50 PM
Eoin, you need to make less beer! :o
Hmmm more actually, drinking far too much shop bought recently.
Gonna fix that in a few days, ESB planned and ready to go.
I might even take a few photos and do a writeup for the site. If I can hide the dangerous pull I do......
Sent using a complex system of semaphore and ninjas.
Well, my keggle is 50 litres, so i won't have 25 kg of grains :)
I would like a 70 l boiler though :D
Cheers!
I try an DIY everything I can. Love to DIY as much as possibly for my brew setup. However, you won't make better than Eoin Mags Bags. I have 100% faith in mine. It's excellently made and fits kettle perfectly. If I wasn't using one of those I'd probably just go for a circular sheet of voile and gather the open end to lift it. That way there's no seams to give. Mashout temp is pretty hot and I can't imagine cleaning up the mess after bursting the bag!