If you can find an oxygen concentrator with the pump option that recharges medical oxygen cylinders, you can use an (use this search term) "Oxygen Cylinder Refill Yoke Adapter~CGA 540 to CGA 870" to connect the cylinders to a conventional welding oxygen regulator.
available. Concentrators ensure a more reliable and lower cost supply of oxygen than cylinders. An oxygen concentrator uses zeolite to separate oxygen from nitrogen in air. The oxygen produced by concentrators is at least 90% pure and can be used in the same way as oxygen from cylinders, with the same beneficial effects.
Boost Oxygen Supplemental Oxygen to Go | All-Natural Respiratory Support for Health, Wellness, Performance, Recovery and Altitude (5 Liter Canister, 4 Pack, Natural) 4.2 out of 5 stars 1,415 $39.96 $ 39 . 96 ($9.99/Count) $47.96 $47.96
Oxygen Concentrator Servicing & Repairs. Diving Oxygen Dive O2. Capnography, Pulse Oximeters & Oxygen Meters. Ambulance Oxygen Systems. Breathing Exercise Systems.