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  #171  
Old 03-04-2015, 10:36 PM
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1001001 1001001 is offline
 
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Quote:
Originally Posted by flightlogic View Post
Looks pretty old. You will need to have it hydro tested... for safety.
More like hydro tested...to cover the filler's butt.
I imagine the fact that it still holds 1500 psig is something of a "test."

And yes I am an engineer.
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  #172  
Old 03-04-2015, 11:24 PM
SHIPCHIEF SHIPCHIEF is offline
 
Join Date: Mar 2008
Location: Seattle
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Looks like a CGA870 valve assembly. Common medical regulators fit it.
here is a link to bottle & valve info:
http://mercurymed.com/catalogs/BDR_T...nformation.pdf
Is it a steel or aluminum bottle?
I don't use oxygen a lot, but I did make up two sets with medical bottles & CGA870 mount regulators. These have flow gauges and I added plexiglass flow meters. I use medical conserving cannula (mustache type)
I have less than $100 into both, and they work fine. I trans-fill from an oxygen bottle at my son's shop.
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Last edited by SHIPCHIEF : 03-04-2015 at 11:29 PM.
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  #173  
Old 03-05-2015, 04:37 AM
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1001001 1001001 is offline
 
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Thanks. By the weight, I'd say it is steel. As mentioned above, I will probably have to check when it was last hydro tested.
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  #174  
Old 03-05-2015, 05:40 AM
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grubbat grubbat is offline
 
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Location: Ga
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Dave, how much does that steel bottle weigh?
Cj

Quote:
Originally Posted by 1001001 View Post
Thanks. By the weight, I'd say it is steel. As mentioned above, I will probably have to check when it was last hydro tested.
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  #175  
Old 03-05-2015, 08:09 AM
krw5927 krw5927 is offline
 
Join Date: Aug 2010
Location: Wichita, KS
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Quote:
Originally Posted by flightlogic View Post
Looks pretty old. You will need to have it hydro tested... for safety.
Correct. However, it might be current as-is. Can we see a photo of the tank neck markings? If it's ever had a hydro test since manufacture, then stamped into the neck there should be a one or two number month, with some (probably 4) smaller numbers stacked in the middle, followed by a two-number year. To be refilled or transported with compressed gas on US public roads, the last hydrostatic test date must be no more than 5 years ago (this timeframe can be different for composite cylinders, but DOT 3AA and 3AL cylinders are almost universally 5 years). You could fill it yourself from a welding cylinder without a current hydro, but you're sort of taking your chances with a bomb.

Because of the rounded bottom, you know it's a steel cylinder. Another way to know it's steel is its DOT designation. DOT 3AA cylinders are steel.

Getting a tank tested isn't difficult, but it can be costly relative to the price of a new modern cylinder at about $25 around here. That $25 would go a decent ways toward a new lighter-weight aluminum tank with current hydro.

Also, that valve looks like a standard keyless CGA870 medical O2 valve.
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Last edited by krw5927 : 03-05-2015 at 08:11 AM.
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  #176  
Old 06-22-2017, 10:35 PM
RVTOY RVTOY is offline
 
Join Date: Oct 2012
Location: Corona , Ca
Posts: 108
Default What fitting needed welding tank to refill aerox portable

Read a lot on forum and probable listed somewhere. Prefer hose and fitting as an assemble but sure I can put items together. I've seen what I think I need but big money / small wallet.
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  #177  
Old 08-13-2017, 01:38 AM
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crewdog434 crewdog434 is offline
 
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Location: Rolling Prairie, Indiana
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Default Regulator refill adaptability

Hey fellow flyers! Perhaps it was mentioned already.....but.....on a trip out west, I took a portable, medical oxygen tank with me to use at higher altitudes. It worked fine until it came time to refill it at the FBO. Most FBO's don't have the appropriate adapters to refill a medical oxygen bottle. Fill ports vary between aviation and medical bottles. Just a thought.
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