Medical oxygen tank complete of valve system, pressure reducer and dosage system. It permits opening and closing of pressure while distributing through the connection of the outlet and by controlling the outgoing oxygen flow, adjustable from 0 to 12 L/min. The group includes: safety valve, pressure reducer, diameter of manometer 40 f. scale 0-315 bar, outlet for tube diameter 6 mm, charging connection 21.7 x 14 fil. W. M. Dx. UNI 4406, flowmeter 0-12 L/min. The tanks are complete with: steel disk for medical use, cumulative test certificate.