<VV> viton vs polyacrylate

[corvairs]

Marginal?  Is that why nearly all dynamic engine seals use this type of 
material?  I'm sure we're talking about the same thing. There are 2 
issues with Viton in a dynamic environment. One is life of the seal 
surface itself - the other is wear on the metal hub being sealed. Some 
modern motors are being moved over to flurolastomer materials (such as 
Viton) but there has to be a corresponding change in the 
material/surface of the hubs. What is that all about?

I am going to contact my seal supplier to find out exactly what material 
mine are made out of - poylacrylic seems to be a fairly generic term. Lon

www.corvairunderground.com

djtcz at comcast.net wrote:

>http://www.marcorubber.com/material_chart.htm
>polyacrylate is rated 4, or marginal, for service around most oils, where viton is rated 1, or recommended.
>For dynamic applications viton is rated 1 (recommended) where poly.... is rated 2, or acceptable.
>PC has a -20 temp rating, where viton has a -5.
>
>empirical data may suggets otherwise, but viton would seem to be the spec sheet champion for engine seals.
>
>--
>Dan Timberlake
>
>-------------- Original message -------------- 
>  
>
>>www.corvairunderground.com
>>
>>Connie wrote:
>>
>>    
>>
>>>Need the wisdom of the masses.  Which bell housing seal is preferred, 
>>>Viton
>>>or Polyacrylate?
>>>
>>>
>>>Thanks!
>>>
>>>Connie
>>>
>>>
>>>      
>>>
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