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  #1  
Old 01-11-2018, 06:24 PM
Tim Lewis Tim Lewis is offline
 
Join Date: Aug 2006
Location: Bristow, VA
Posts: 79
Default Filling Oxygen tank - DIN adapter needed

I want to get my portable oxygen tank (with what I believe is a CGA 540 connector) filled at the local scuba store, but they don't have an adapter to connect to my tank. The scuba store's output uses a DIN connector, shown here:

http://www.dropbox.com/s/0wu3payp4lh...r%20small.jpg?

Here's the tank I want to attach to:

https://www.dropbox.com/s/u05i5zpqam...small.jpg?dl=0

I think I need a DIN female to CGA 540 female adapter, but have not had any luck finding one. I'd appreciate any insight regarding what adapter I need, and possible sources of adapters.
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Last edited by Tim Lewis : 01-11-2018 at 06:42 PM.
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  #2  
Old 01-11-2018, 07:12 PM
Steve Barnes Steve Barnes is offline
 
Join Date: Jul 2008
Location: Santa Rosa, CA
Posts: 545
Default Oxy

Does your scuba store sell oxy? I thought they just used compressed air. Medical or welding oxy work. I use welding oxy and had the welding shop make up the adapter or you can buy on line. The welding or medical suppliers won't generally fill aviation tanks.
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  #3  
Old 01-12-2018, 08:37 AM
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airguy airguy is offline
 
Join Date: Oct 2006
Location: Garden City, Tx
Posts: 4,363
Default

http://www.mhoxygen.com/index.php/gr...equip/adapters
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  #4  
Old 02-04-2018, 01:47 PM
Tim Lewis Tim Lewis is offline
 
Join Date: Aug 2006
Location: Bristow, VA
Posts: 79
Default Problem solved

"The Scuba Diver Store" in Milwaukee, WI assembled an adapter for me. CGA 540 nipple (part Global 4521 1oxC) to Scuba port Converter Block (part Global 4502 1ox). Cost including shipping was $83.15.




Today my local tech diving store (Virginia Scuba) filled the tank with Oxygen for $0.50 per cubic foot, which was $7.50. That compares favorably to $50 at my local airport, and $35 at the local industrial gas place (which takes weeks to do a fill in any case). The adapter will pay for itself on the second fill.

The adapter, as delivered, leaked. The diving store added more teflon tape, problem solved.
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RV-10 N31TD - 1000 hrs
RV-6A N47TD - 1100 hrs (sold)

Last edited by Tim Lewis : 02-04-2018 at 02:12 PM.
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  #5  
Old 02-04-2018, 04:30 PM
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JCSmith JCSmith is offline
 
Join Date: Apr 2013
Location: Kenosha, WI
Posts: 26
Default Compressed air is different from “oxygen”

Be careful with thinking you can fill your O2 tank at a scuba store. As a scuba diver, I know that we use compressed air in our tanks, not oxygen. There is a big difference between oxygen and compressed air!
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  #6  
Old 02-04-2018, 04:34 PM
dweyant dweyant is offline
 
Join Date: Sep 2012
Location: 07TS
Posts: 447
Default

Any dice shop that does technical diving will have oxygen bottles.

The other option is to get your own bottle. Last one I bought was about $30 for 300 cubic foot of O2.

If you are going to do that however, please make sure you know how to safe
Y handle O2. It isn’t hard but can be very unforgiving.

-Dan
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  #7  
Old 02-04-2018, 04:52 PM
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Auburntsts Auburntsts is offline
 
Join Date: Jan 2005
Location: Dumfries, VA
Posts: 2,590
Default

Quote:
Originally Posted by JCSmith View Post
Be careful with thinking you can fill your O2 tank at a scuba store. As a scuba diver, I know that we use compressed air in our tanks, not oxygen. There is a big difference between oxygen and compressed air!
Tim knows that. But to assure everyone, this particular dive shop carries air, nitrox, helium, and O2.
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Last edited by Auburntsts : 02-04-2018 at 06:54 PM.
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