Yes. M22 and Jumbo D are two names for the same size of medical oxygen cylinder. Jumbo D is the common trade nickname and M22 is the size code, and both appear on purchase orders and specifications. If either term is used, this is the cylinder meant.

The size range runs from small portable cylinders upward, and the Jumbo D sits above a standard D while remaining a portable size. The practical difference is capacity against weight and length, which decides how long a cylinder lasts between changes and how easily it is carried or mounted. The specifications for this cylinder are listed on this page.

A post valve, CGA870, uses a yoke arrangement common on smaller portable medical cylinders. CGA540 is a threaded connection used on larger cylinders such as the M122. They are not interchangeable, so the regulator and the filling connection must match the valve fitted to the cylinder.

No. It ships empty. Medical oxygen is a prescription drug product in the United States, and filling is carried out by licensed medical gas fillers under the applicable regulatory requirements. All Safe Global supplies the cylinder as a container to the trade and does not supply medical oxygen gas.

It is sold wholesale to medical gas distributors, licensed fillers, home care providers and healthcare supply organizations. All Safe Global does not sell single cylinders to patients or members of the public. Contact us for trade pricing and terms.

Aluminum is significantly lighter than steel for the same capacity and does not rust, which matters where cylinders are carried, mounted on equipment or moved frequently. It is the standard construction for portable medical oxygen service.

It means the cylinder is manufactured and marked to United States Department of Transportation and Transport Canada specifications, which is what permits filling and transport in those markets. The specification, serial number and test date are stamped on the cylinder and read before every fill.

On a set DOT interval from the test date stamped on the cylinder. A filler checks that date before every fill and refuses an out of date cylinder. Scheduling requalification ahead of the date keeps a fleet in service.

Yes. We are a DOT-authorized requalifier operating hydrostatic and ultrasonic testing and visual inspection across four centers. Cylinders returning to oxygen service require hydrocarbon-free preparation, which is handled as part of that work.

Yes. We supply distributors, licensed fillers and home care providers at wholesale, with pricing improving on quantity. Send quantity, valve requirement and delivery point for a quote with availability and freight.