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KB
Joined: 06 Nov 2014 Posts: 334 Location: Virginia
Working on: Next brew
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Link Posted: Sat Jul 29, 2017 7:16 pm Post subject: Stir plate keeps throwing stir bar |
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I'm using the Fermentap Magnet Stir Plate from MoreBeer. Worked fine with a 2L flask.
Needed a larger starter for a lager so used a 5L flask with a little bit more than 2L liquid. The stir plate keeps throwing the stir bar.
Is the stir plate too small for a 5L flask?
If not, what size (length) stir bar is recommended for a 5L flask with the stir plate?
Thanks.
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kal Forum Administrator
Joined: 12 Dec 2010 Posts: 11122 Location: Ottawa, Canada
Drinking: Pub Ale, Electric Creamsicle, Mild, Pliny the Younger, Belgian Dark Strong, Weizen, Russian Imperial Stout, Black Butte Porter
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Link Posted: Sat Jul 29, 2017 8:01 pm Post subject: |
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Not sure myself as I've not used that stir plate. Have you asked the manufacturer? They'd probably be the best to offer suggestions. The specs at MoreBeer do say it can be used with a 5L flask. It may be stir bar dependant however.
You may have to run it slower too with a 5L flask. Ramp up the speed slowly.
Kal
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Ozarks Mountain Brew
Joined: 22 May 2013 Posts: 737 Location: The Ozark Mountains of Missouri
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Link Posted: Sun Jul 30, 2017 12:04 am Post subject: |
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some brands of flasks have a high spot in the middle, which doesn't let the stir bar spin in the middle so it wanders then throws, I bet thats it
_________________ "Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world."
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siestakey
Joined: 10 Mar 2017 Posts: 49
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Link Posted: Sun Jul 30, 2017 2:19 am Post subject: |
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Were you using a wide stir bar? I was having trouble when I moved up to a 5L flask with the wide stir bar. Unless it is a large starter (3L or more) i usually use the small "normal" sized stir bar.
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KB
Joined: 06 Nov 2014 Posts: 334 Location: Virginia
Working on: Next brew
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Link Posted: Sun Jul 30, 2017 12:49 pm Post subject: |
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Ozarks Mountain Brew wrote: | some brands of flasks have a high spot in the middle, which doesn't let the stir bar spin in the middle so it wanders then throws, I bet thats it |
I purchased the 5L flask from a homebrew supply. Other than the overall size, the bottom is identical to my 2L flasks.
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KB
Joined: 06 Nov 2014 Posts: 334 Location: Virginia
Working on: Next brew
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Link Posted: Sun Jul 30, 2017 12:50 pm Post subject: |
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siestakey wrote: | Were you using a wide stir bar? I was having trouble when I moved up to a 5L flask with the wide stir bar. Unless it is a large starter (3L or more) i usually use the small "normal" sized stir bar. |
No, normal width, as far as I know, stir bar. Looks like a pill.
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kal Forum Administrator
Joined: 12 Dec 2010 Posts: 11122 Location: Ottawa, Canada
Drinking: Pub Ale, Electric Creamsicle, Mild, Pliny the Younger, Belgian Dark Strong, Weizen, Russian Imperial Stout, Black Butte Porter
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Link Posted: Sun Jul 30, 2017 12:57 pm Post subject: |
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Try a shorter stirbar possibly. Longer isn't always better.
Kal
_________________ Our new shop with over 150 new products: shop.TheElectricBrewery.com
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dp Brewing Company
Joined: 08 Jul 2013 Posts: 664 Location: Midwest
Drinking: Chocolate Taco, Raspberry Mango Cider, American X, Sandy Dunes
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Link Posted: Mon Jul 31, 2017 12:18 pm Post subject: |
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kal wrote: |
You may have to run it slower too with a 5L flask. Ramp up the speed slowly.
Kal |
This was the case for my last stir plate. You just had to find the sweet spot.
kal wrote: |
Try a shorter stirbar possibly. Longer isn't always better.
Kal |
Also great advice.
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kal Forum Administrator
Joined: 12 Dec 2010 Posts: 11122 Location: Ottawa, Canada
Drinking: Pub Ale, Electric Creamsicle, Mild, Pliny the Younger, Belgian Dark Strong, Weizen, Russian Imperial Stout, Black Butte Porter
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Link Posted: Mon Jul 31, 2017 12:48 pm Post subject: |
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For what it's worth, I tend to mostly use my 1-3/8" stir bars all the the time, on both 2L and 5L flasks. Most have a ridge in the middle. As mentioned by others, make sure the flask is flat in the center bottom. Some are not and you'll never get it to work right.
Kal
_________________ Our new shop with over 150 new products: shop.TheElectricBrewery.com
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