Filling adapter for carbonic acid for filling CO2 and argon cylinders with valves according to DIN 477-6 which have a flow-off protection/residual pressure valve. The thread W21.8 is used for all gas cylinder valves that are used for shielding gas welding, argon, helium, carbonic acid and argon mixed gases.
filling and removing adapter for oxygen / air; to fill nitrox tanks with oxygen valve.