The production of plasma requires gas, energy in a suitable form and a burner. Plasma gas is a medium from which plasma is formed. Plasma gas is ionized in the nozzle. Suitable plasma gases include argon, hydrogen, nitrogen and their mixtures as well as pressurized air and oxygen.
Shielding gas is fed from the outer nozzle, blanketing the plasma gas jet and preventing air from entering the arc. Depending on the gas used, gas shielding may intensify arc concentration. The shielding gas and the plasma gas are often the same.
VARIGON® H35Suitable for use in the plasma cutting of stainless steels
Colorless and odorless gas
Lighter than air
Ar: Main gas
Hydrogen: 35% water < 20 ppm
Oxygen < 20 ppm
Other plasma-cutting gases: nitrogen and oxygen.