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> The whole "oxygen clean" thing revolves mainly around 2 points, lube
> and o-rings.  As far as lube is concerned, almost everybody is using
> the O2 safe stuff anyway, because it's a much better lubricant.
> O-rings are really not an issue.  The "o2 safe" part of O-rings
> doesn't really refer to them causing a problem in terms of
> combustion, but rather that some materials will degrade faster in an
> oxygen environment than others.  Regular O-rings seem to work just
> fine, and since we replace them all once a year anyway, it's really
> not that big a deal.

What about an item actually being taken apart and physicaly cleaned? The
inside of a valve or 1st stage could have a burr, silicone or other
accumulated hydro carbons. A few more points to consider about o-rings,
1st-viton burns at a high a higher temp than buna-n, 2nd viton gives of a
gas when burning that I understand is quite poisenes. However the price of
viton o-rings over buna-n is only pennies. So why not just use viton?


> There are two other issues, which really don't affect mots people.
> One is that some dry sealed systems use a whole bunch of lube in the
> dry chamber, and people have been using silicone for that.  My regs
> are Apeks, which don't need that, so I know little about this.  The
> other is that certain metals are more combustible, such as titanium.
> Don't use regs that have titanium parts (they'll tell you on the box,
> because titanium is really expensive and "sexy" .... and dangerous).
> Some Apeks regs have titanium parts.

I'm just waiting for Atomics to come out with a magnesium 1st stage :-) What
Apeks regs have titanium parts, wich parts?

Safe diving,
Rich Gulley

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