Lee,

Do they have a haskel?  Oxygen comes from the gas companies in tanks
that are
only pumped up to around 2200 psi, hence the fill limit (i.e. it's
nothing to do with
your or your tanks).  I know you're aware of this, but by "banking" the
tanks and
rotating them you can scavenge most of the gas out of the tanks before
they get sent
back and replaced with full ones.  Haskels allow you to boost the
pressure from
roughly 100 psi up to 3500 psi, thereby not only performing the
scavenging better
and reducing the need for "banking", but also to get a higher working
pressure.

Carl

Lee Bell wrote:

>>An 80?  Better an lp steel 72.  Most places won't pump O2 about 2200 psi.
>>
>>
>
>It probably would have been better to have used a lp 72 for exactly the
>reason you mention.  Lucky for me, though, it's not a problem any more.
>There's a shop up the road called Fill Express.  They're set up for nitrox
>and trimix.  With my nitrox air card, they'll pump anything from air to 100%
>O2 up to the whatever pressure they think the tank is safe for.  Since the
>service quite a few GUE people, I imagine they'll pump lp tanks to more than
>their stamped service pressure.  I'm pretty sure they'll fill my 80 to it's
>full 3,000 psi capacity.
>
>Lee
>
>
>