Safe material for seals.

[Kentucky shinner]

I spoke with the folks at Vendome Copper this morning in Louisville KY. I was able to speak with one of there engineers. I was inquiring on what material they used to seal their covers and sight glasses. They use Buna rubber and teflon. I know there has been some dicussion on here about safe materials and I thought this was pretty interesting. This is all they use for any of there seals.
KS

[Barney Fife]

We used to put lead in paint and gasoline and such, too. Because it worked. Doesn't make it right, though.

[Samohon]

Thanks KS, I'll definitely look Bunu rubber up... I always think toxic-ally when it says the dreaded rubber word...

[olddog]

I think I will stick with cork on the inside with a PTFE seal on the outside, at least I know it's safe.


OD

[rubber duck]

So if a guy wanted to send some of this stuff to a lab to be tested what would one want to test for?

It's a serious question, I drink a lot of micro distilled booze off of vendom rigs. If Bunu rubber is unsafe I would like to know why and what's unsafe about it.

[cob]

http://www.magnaloy.com/technotes/Buna.80.MSDS.pdf" onclick="window.open(this.href);return false;" rel="nofollow. it's a start. cob

[rubber duck]

So by the MSDS sheet it could be an inhalation hazard,(black carbon), I'm not a chemist or a doctor, is there anything on that list that could hurt a person if it was ingested?

[cob]

not a chemist either. cob

edit; nor can i spell.

[cob]

osha title 29 1910.1200 toxic and hazardous substance. http://www.osha.gov/pls/oshaweb/owadisp ... p_id=10099" onclick="window.open(this.href);return false;" rel="nofollow. that covers 7 of the 10 listed elements. cob

[cob]

the other 3 elements are covered by "sara title III." these are superfund cleanup monitored elements. buna rubber c.o.b.

edit; link http://www.ak-prepared.com/serc/SARA_Summary.htm" onclick="window.open(this.href);return false;" rel="nofollow

[Kentucky shinner]

I was just surprised. I called to find put what they were using and to try and find a better supplier safe material. I am guessing that if you buy American made booze your drinking likker frome a vendome copper still.

[Samohon]

I was just surprised. I called to find put what they were using and to try and find a better supplier safe material. I am guessing that if you buy American made booze your drinking likker frome a vendome copper still.

+1 KS, after looking up vendome got me thinkin along the same lines man...

[paintball]

Hi,.. Im new here but was wondering what all of you use instead of Buna, PTFE or silicone seals? I mean do most of you use flour, water, cornmeal or cotton rags? None of you use Buna? none use Teflon or PTFE as seals under your clover clamps??

I read through all of those data sheets you posted Cob,.. thanks for that. I noticed in reading that the danger is from inhalation,.. fumes and vapors, which means some kind of burning. The Magnaloy Coupling sheet clearly states that the danger is only reached above 450F degrees. We dont distill at anywhere near these temps.

This sounds like the burning tire thing,... apply 450F degrees to Buna, PTFE or silicone seal will also produce toxic inhalations.

That being said I know hi proof alcohol will etch plastic, at least refrigerator plastic,.Ive done it. But the Buna and teflon seals are different and much more chemical tolerant than regular plastic. The distillery here in San Diego uses them,. are they actually poisoning their customers?

What do all the members of the rubber police use ?

anyone follow the instructions on your fluoride tooth paste tube each time you brush??? call 911 poison control please if you swallow any of it.

[Kentucky shinner]

PTFE is the best choice by far.

[Samohon]

PTFE is the best choice by far.

My conclusions as well KS, PTFE may be a tad expensive, but the piece of mind is priceless...

[paintball]

PTFE then it is, and I went cheap and bought Buna, the shipping is killing me.






"what it is, what it was, what it will never be again, 'mise well enjoy it now"

[aqua vitae]

Buna rubber is probably not the best choice. According to the sheets linked below (unfortunately in Swedish) Buna rubber (Buna-R = Nitrile, NBR and Buna-S = Styrene-Butadiene, SBR) got limited resistance to ethanol and is not persistent for ethyl acetate at all.

http://www.bryggforum.nu/download/publi ... tabell.pdf" onclick="window.open(this.href);return false;" rel="nofollow
http://www.bryggforum.nu/download/publi ... forlig.pdf" onclick="window.open(this.href);return false;" rel="nofollow
http://www.bryggforum.nu/download/publi ... kemtab.pdf" onclick="window.open(this.href);return false;" rel="nofollow

PTFE however is resistant to all chemicals in the sheets.