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Tim Olson
Joined: 25 Jan 2007
Posts: 2882
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 Posted: Sat May 02, 2009 9:15 am Post subject: Oxygen |
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That's great! Just avoid any oil lubed vac pumps that could leave oil
in them. But, once you've pulled the vacuum once I wouldn't bother in
the future. Tim
On May 2, 2009, at 11:19 AM, Charles Kuss <chaskuss(at)yahoo.com> wrote:
| Quote: |
Tim,
Interesting idea on evacuating the oxygen tank prior to filling it.
As the owner of an auto repair shop, I have a vacuum pump (for
working on air conditioning systems) I'm sure I could rig up an
adapter to draw most of the air out of my cylinders prior to filling
them myself. Thanks for the idea and the excellent post.
Charlie Kuss
snipped
> So everyone has a huge concern for gas purity. Thay
> may have been why they decided to go to single-source
> filling. Like I said before though, there are some
> situations where they will pull a vacuum on a cylinder
> before filling it, to empty it first. So they may do
> this for some medical/aviation O2, hence that may be
> why they just want to swap you. But, if you're
> always filling it with pure O2 you have no worries.
snipped
> Tim Olson - RV-10 N104CD
> do not archive
> az_gila wrote:
>>
> <gilalex(at)earthlink.net>
>>
>>
>> Bruce(at)Glasair.org wrote:
>>> SCUBA is compressed air, NOT O2.
>>>
>>> Bruce WWW.Glasair.org
>>>
>>> --
>>
>>
>> True for "scuba", but they do use other gas
> combinations.
>>
>> In Tucson, they seem to be the only place - other than
> the expen$ive
>> FBOs - that will refill my tank. A lot of the
> industrial/medical gas
>> places only want to swap bottles, not actually refill
> yours.
>>
>> Try your local dive shop for Oxygen tank refills.
>>
>> And interestingly, they even said their bottles are
> labeled "Aviators
>> Breathing Oxygen". Prices quoted were very
> reasonable and they could
>> even get my old bottle hydro tested for $20 or so.
>>
>> As a glider pilot though, I've had Oxygen refills
> from many sites in
>> the West, and they all use welding oxygen.
>>
>>
>>
>>
>> Read this topic online here:
>>
>>
> http://forums.matronics.com/viewtopic.php?p 42406#242406
>>
>
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lsbrv7a(at)yahoo.com
Guest
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| Posted: Sun May 03, 2009 6:07 pm Post subject: Oxygen |
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I suggest one purchase a new 244cu ft or a 300cu ft.cylinder, or more for cascade filling, then paint or stamp your name on the cylinder then insist (eccentric request so fake a tic) on getting your marked cylinder back if your are worried about contamination.
Sherman Butler
RV-7a Wings
N497GS reserved
Carlsbad, NM
--- On Sat, 5/2/09, Tim Olson <Tim(at)MyRV10.com> wrote:
Welders are also very concerned with purity of gasses
or their welds will be contaminated or weak.
So everyone has a huge concern for gas purity. Thay
may have been why they decided to go to single-source
filling. Like I said before though, there are some
situations where they will pull a vacuum on a cylinder
before filling it, to empty it first. So they may do
this for some medical/aviation O2, hence that may be
why they just want to swap you. But, if you're
always filling it with pure O2 you have no worries.
Additionally, one thing you should try to do is never
run your bottle completely empty. Keeping 100psi in
it at all times will ensure that no contamination gets
in.
[quote][b]
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