I just got this from my chem people and thought others may find it useful. You can check your glycol % with a hydrometer! Remember less glycol is better for heat transfer so put in just enough to cover your freeze point.
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am i missing something here?
I am really confused... On the chart Ted put up (and from what a ProChiller tech guy told me), a 35% v/v glycol mixture is supposed to be 1.037 SG or so. But if you look at the guide ProChiller put up in the Refrigeration section (http://www.probrewer.com/resources/r...ion/glycol.php) that same mixture is 27 Brix which is approximately 1.115 SG.
I feel stupid for bringing this up, because I must be missing something. Can anyone explain this discrepancy?
Thanks for your helpLast edited by rafters_brewer; 03-30-2007, 01:10 PM.
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Originally posted by rafters_brewerBut if you look at the guide ProChiller put up in the Refrigeration section (http://www.probrewer.com/resources/r...ion/glycol.php) that same mixture is 27 Brix which is approximately 1.115 SG.
http://www.dow.com/heattrans/tech/da...DOWFROST-47857 (select the Dowfrost technical data sheet)
I wish I could provide more to help resolve any questions. I will however extend my offer to test anyone’s glycol solution at no charge if they would like to send a small sample to us. (I will use my good old Refractometer that provides the freeze point in degrees F!)
Good luck,
Jim
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Cheers & I'm out!
David R. Pierce
NABC & Bank Street Brewhouse
POB 343
New Albany, IN 47151
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Originally posted by jimvgjrThe brix readings that you are referring to from our pocket chart was provided by a propylene glycol manufacturer. ... send a small sample to us. (I will use my good old Refractometer that provides the freeze point in degrees F!) Jim
If you look at The chart I put up (from Enerco Chemicals btw) the refractive index is much different number than the gravity number. Pro's chart says it is for reading using a refractomerter and not a hydrometer. However I cant figure a logical correlation between a Brix of 25.3 and "refractive index" of 1.3721? (I am using lines for 1/3 glycol on all three charts) I suggest you ignore these and use a hydrometer!
If reading with a spindle I would believe your tech and the enerco chart. David Prost's chart also confirms a 1/3 mixture of glycol = 1.034 sg, as does my empirical evidence of re-filling my line chiller reservoir- a known volume.Brewmaster, Minocqua Brewing Company
tbriggs@minocquabrewingcompany.com
"Your results may vary"
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Originally posted by Ted BriggsJim- that still doesn’t tell the volume of water or glycol to add!!
Jim
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