[SEL] Orings

Dave Rotigel rotigel at me.com
Tue May 10 18:24:03 PDT 2011


Hi Tommy, I believe that I've had similar problems after ingesting a small blue pill!
	Dave

On May 9, 2011, at 10:34 PM, Judge Tommy Turner wrote:

> Joe,  I've seen some of the swelled O Rings in the past.  I remember
> accidentally dropping one once in can of lacquer thinner.  It took me a
> couple of minutes to fish it out and it had swelled considerably in that
> short period of time.  After a couple of hours it had swelled a LOT even
> though it wasn't still in the thinner.  The thinner must have penetrated
> the material in some way.
> 
> Tommy Turner
> Magnolia, KY
> 
> 
> 
> 
> -----Original Message-----
> From: sel-bounces at lists.stationary-engine.com
> [mailto:sel-bounces at lists.stationary-engine.com] On Behalf Of
> avanti_64 at juno.com
> Sent: Monday, May 09, 2011 7:25 PM
> To: sel at lists.stationary-engine.com
> Subject: Re: [SEL] Orings
> 
> 
> O rings will work in both models and stationary engines. I used to sell
> mechanical seals for a living and some of the guys here on the list
> remember when I had the old fashioned asbestos gasket material. Well
> nowadays I carry Garlock non asbestos material but that is another
> subject. There are 2 basic rubber compounds that are available to you.
> Buna N is the type that comes in the inexpensive commercial grade o ring
> kits where you get about 200 of the different sized o rings. This
> material is good to 210 degrees F. The other higher temp material is
> called Viton, it will get you up to 400. O rings take the shape of the
> groove they occupy and after awhile take a compression set. Basically if
> you put a round o ring in a square groove it will come out square and
> heat will harden it. Chemical attack makes them soft. I think a quad
> ring may work better in some applications, this is found in hydraulic
> cylinders and is basically a 4 sided o ring.  Do not use a material
> called ethyle!  ne propylene (EP), petroleum lubricants will swell the
> material and your engine won't move. Hope this helps. Joe
> 
> 
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