Actually, I prefer Viton myself! Viton impregnated with graphite is also excellent for wear resistance as well.

Frank Grunthaner

 

 

 

-----Original Message-----
From: Alistair Bell <albell@SHAW.CA>
To: vanagon@GERRY.VANAGON.COM
Sent: Sun, May 9, 2010 10:05 pm
Subject: Re: throttle body fun

no abrasion in this situation, static. 
 
mind you, in the past I have used silicon o rings in rotating seal 
assemblies, seals that saw 121 C, I bar pressure, pH from 2.7 to 8.5. 
worked pretty well. 
 
alistair 
 
On 9-May-10, at 9:18 PM, Tom Hargrave wrote: 
 
Regarding O-rings. Silicone will withstand greater temperature range but 
buna has better abrasion resistance - it wears better. 
 
Tom 
www.stir-plate.com