Replacement for "O" rings.

[Kenneth G. Gordon]

On 18 Apr 2006 at 9:01, Mark Sykes wrote:

> They eventually dry out, stretch a bit, and then they slip.  Think of
> them as part of a yearly maintenance item in a tube rig.  I took one
> to a hardware store and got replacements very cheaply.
> >
> > Is the problem with the orings is that they don't hold up or that
> > they don't work well?

Actually, they WORK quite well, and in most environments, hold up a 
long time.

However, we have an electronic air-cleaner both in our home, and at 
work. One of the ways these things work is that they add a SMALL 
amount of ozone to the air. The ozone both makes the air smell cleaner 
(like the air does after a thunderstorm), and kills a lot of bacteria and 
viruses that ordinarily are in the air.

The percentage of ozone in the air has to be kept fairly small, or it will 
irritate eyes and other soft tissue.

However, apparently ANY amount of ozone causes RAPID deterioration 
of the material the "O" rings are made of. In my case, they last about 2 
weeks!!!!!

I first discovered this problem at work when I was having to replace the 
drive belts to CD ROM drives in many computers. Those drive belts are 
made of the same material that the "O" rings in our rigs are.

Ken W7EKB

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