Method for supplying a plasma torch with a gas, mixed gas, or gas mixture, comprising volumetric flow regulation in combination with pressure regulation; and arrangement for carrying out said method

An arrangement for supplying a plasma torch with at least one gas in which the volume of the at least one gas is controlled the arrangement comprising:

• at least one gas source for providing at least one gas to be supplied to the plasma torch;
• at least one volume flow portion to produce a total volume flow of the at least one gas to the plasma torch and
• an effected volume flow control for controlling volume flow of the at least one gas to the plasma torch, said volume flow control using pressure control to adjust the level of the total volume of the at least one gas flowing through the plasma torch, said volume flow control adjusting the volume flow portions producing the total volume flow of the at least one gas flowing through the plasma torch thereby producing the desired composition of the at least one gas.