Patent ID: 7326875
Filing Date: 2008-02-05
Classification: B23K,H05H

Abstract:
1. A method of supplying a plasma torch with at least one gas in which the volume flow of the at least one gas is controlled, the method comprising: determining a desired composition of the at least one gas to be supplied to a plasma torch; providing, from at least one gas source, a volume of the desired composition of the at least one gas to the plasma torch; effecting volume flow control of the at least one gas to the plasma torch by using pressure control to adjust the level of the total volume of the at least one gas flowing through the plasma torch and using volume flow control to adjust 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; and controlling the at least one volume flow of the at least one gas on the basis of at least one of calorimetric measurement of the volume flow, measurement of the volume flow from differential pressure, and measurement of the pulse movement of the volume flow.