<VV> Viton since 1958

[Sethracer at aol.com]

Corvair engineer Bob Benzinger -  at the Flagstaff convention,  2002 - 
stated that GM decided not to use Viton on the Corvair O-rings  because of poor 
cold weather performance in Canadian tests. There were some  strange looks 
in the audience.
 
 -Seth
 
 
In a message dated 6/30/2015 6:11:25 P.M. Pacific Daylight Time,  
virtualvairs at corvair.org writes:

I'm  having trouble finding out what was used on the SRBs, but I don't 
think it was  Viton. For one thing, Viton performs well at fairly low temps, 
like  -40ºF.




John Roberts




-----Original  Message-----
From: Bill Hubbell via VirtualVairs  <virtualvairs at corvair.org>
To: BBRT  <chsadek at comcast.net>
Cc: <virtualvairs at corvair.org>  <virtualvairs at corvair.org>
Sent: Tue, Jun 30, 2015 4:21  pm
Subject: Re: <VV> Viton since 1958


They don't work well  on frozen rocket boosters either.....

Bill

On Jun 30,
2015,  at 4:10 PM, BBRT via VirtualVairs  <virtualvairs at corvair.org>
wrote:

FYI... O-rings wre invented  in 1936..according to a web site.  Haven't
found when Viton was made  into o-rings, but the following may surprise
folks.

Authentic  Viton®
Insist On the Best

Viton® was introduced in 1958 and
ever  since scientists and engineers have relied onDuPontT Viton® for  its
superior performance and unique properties. However, DuPont is not the  only
company that manufactures FKM products. Many people in the industry  
incorrectly
refer to any and all FKM elastomers as Viton®. Products that  are not made 
from
100% virgin DuPontT Viton® may fall short of the expected  performance 
levels
afforded by the stringent quality standards DuPont has  set for Viton®, 
which is
manufactured at ISO 9002 registered facilities  worldwide.

BTW, Viton is not
good when frozen..nor is rubber, for  that matter... Years ago, I was told 
Viton
o-rings came on the market in  the mid-60's. Can't  verify.

Chuck
S
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