 Rank: Newbie Groups: Registered
Joined: 1/16/2011(UTC)
Posts: 6
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Has anyone experianced melting there grad cyclinder testing their 2nd run of 190 P ? Just tweaked in my new still temp control and I am running about 95 % efficiancy but now this. Glass only above 180 proof ?
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 Rank: Administration Groups: Administrators
Joined: 2/10/2002(UTC)
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Your cylinder must have been acrylic... ethanol eats acrylic. 
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Rank: Newbie Groups: Registered
Joined: 1/16/2011(UTC)
Posts: 6
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Was from a local wine and beer supply shop. Probibly, have a glass one on order. worked fine with the 180 P but this later more purer batch must have breached its limit.
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 Rank: Advanced Member Groups: Registered
Joined: 8/17/2008(UTC)
Posts: 424
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Yeah, glass has a melting point of about 1000*c Hopefully your juice wasn't quite that hot! 
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Rank: Newbie Groups: Registered
Joined: 1/16/2011(UTC)
Posts: 6
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I have it dialed in pretty good with my simple little pot. Measured 190 proof before the cylinder disolved :)
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Rank: Senior Member Groups: Registered, Moderator
Joined: 4/14/2010(UTC)
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"so your saying the [COLOR=""Red""]proof[/COLOR] of the hooch melted it --- or the [COLOR=""red""][COLOR=""red""]temp[/COLOR][/COLOR] of the hooch melted the tube???
I have put 190 proof in my plastic measuring tube and never seen that happen. Not being testy just curious??"
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Rank: Newbie Groups: Registered
Joined: 1/16/2011(UTC)
Posts: 6
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It was the proof ..apparently not good above 180 p
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Rank: Senior Member Groups: Registered, Moderator
Joined: 4/14/2010(UTC)
Posts: 1,666
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"huh.......i see admin says ethanol eats acrylic and I believe it, I just saying that never happened to mine.
You know mine might be some other plastic --other than acrylic. But I have put 190 in it with no ill effects. Oh well I just got lucky I guess."
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Rank: Senior Member Groups: Registered, Moderator
Joined: 4/14/2010(UTC)
Posts: 1,666
Was thanked: 15 time(s) in 15 post(s)
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Most of the time I dont measure 190 cause I throw out the first pint that comes across. To me thats the foreshots and some of the heads that I dont want anyway. Then by the time I start keeping it its down to 180 or so. Thats just my workings and really means nothing..........
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 Rank: Junior Member Groups: Registered
Joined: 1/2/2011(UTC)
Posts: 17
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Ive never had any issues with my cylinder melting either.
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Rank: Newbie Groups: Registered
Joined: 1/16/2011(UTC)
Posts: 6
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I will get the mfg id for it and post. It was from a local wine supply shop. Samples at my lab have been at 95% since I installed the omega temp control system. Looking into plastic compatabilty I agree with admin. Lexan appears to be the issue.
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