Wanted O2 bottle

Wanted O2 Cylinder about 22" long total X 5" Diameter.

On Wednesday, July 17, 2019 at 2:58:01 PM UTC-7, Geoff Minors wrote:
Wanted O2 Cylinder about 22" long total X 5" Diameter.

Your best bet is to choose a standard size medical cylinder, then have it fitted with a CGA540 valve to adapt to standard aircraft oxygen fittings. Most of the places that sell medical cylinders can do that for you.

Standard size chart:

https://www.tri-medinc.com/page12.htm#cyl-spec

Your best bet is to choose a standard size medical cylinder, then have it fitted with a CGA540 valve to adapt to standard aircraft oxygen fittings. Most of the places that sell medical cylinders can do that for you.

Wrong!

Medical cylinders, even though they are standard sizes, are invariably more expensive due to the influence of the legions of lawyers feeding off the health care system. (Rant off)

Medical cylinders are usually supplied with the "Puritan-Bennett" post type outlet valve which only connects to the same type (CGA-870) fill apparatus. All US industrial and aviation cylinders use the CGA-540 outlet. This includes welding applications.

Buying a "medical" cylinder with a CGA-870 fill system and then changing it to a CGA-540 valve and gauge will probably double the price of just buying the right cylinder and valve from Mountain High E & S.

https://www.mhoxygen.com/product/aluminum-cylinders/

The cylinder you want is probably either the AL-415 or AL-647. the 415 is 4.375 in diameter, the 647 is 5.3 inches. Length with valve is less than 22 inches. Don't forget to add the length of the regulator when planning for your installation.

And if you decide on a medical cylinder and CGA-870 fill system, don't be surprised when the airport won't fill it for you, and neither will a medical facility unless you have a prescription from a Doctor.

I have been selling and servicing Aviation Oxygen systems for hang glider pilots and sailplane pilots since 1991.

And, NO, there is absolutely no difference in medical, welding and aviation oxygen, except for the price, which is determined by the amount of paperwork, record keeping and liability associated with the intended application. (See above Rant)

Actually markm you are incorrect. It is about 1/2 to 1/3 the cost to purchase oxygen bottles from a medical or ems supplier versus an aviation source.. You can special order them with straight through or 90 degree cga 540 valves for a few dollars extra. The origional poster is looking for a D or Jumbo D bottle more than likely. Should cost about $100 USD from an EMS source.

Tim- Can you provide a link to the source you describe? I have never found a medical supplier that charges the prices you quote, and would like to have an option for customers who may require cylinders. Thanks.

Correction- I can find plenty of suppliers as described, but have not found any that offer the CGA-540 outlet with gauge. Only the CGA-870 post type.

http://www.cramerdeckermedical.com/c...?category_id=2

Thanks for the link. Note that the (optional) brass Sherwood CGA 540 valves do NOT have a pressure gauge and are rather bulky compared to the valve/gauge combination offered with the MH cylinders. But the price is definitely attractive.

Oops! I just saw the low profile CGA 540 valve with gauge on the options list. Costs $30 extra.

Mark,

I see you found one with a price. Most of the suppliers do not list them on their webpages, but if you call or e-mail they will give you a price for any valve configuration you like. I have had cylinders fitted with the straight through cga 540 with gauge as well as the larger 90 degree 540. I used to use life assist, but there are many suppliers to choose from now.

Tim