Abstract: A nozzle for a cutting torch has three coaxial parts. An inner nozzle part includes an axial cutting duct, and machined longitudinal ducts for a fuel-gas/oxygen mixture which are open on the outside. The inner nozzle part is inserted into an outer nozzle part which radially delimits the longitudinal ducts. An annular mixer part is on a head region of the nozzle, radially delimiting the longitudinal ducts at the attachment to the outer nozzle part. The mixer part has radial bores which open as fuel gas passages into the longitudinal ducts which supply heating oxygen. The longitudinal ducts are through-machined from the mouth of the fuel gas passages to tapered regions of the inner and outer nozzle parts.

Abstract: In a cutting torch machine having an internal ignition device on a cutting oxygen channel which is in communication with an ignition gas generating mixing stage, the mixing stage can be connected via a controlling heating oxygen pressure reducer and at least one heating oxygen solenoid valve to a heating oxygen source and via a fuel gas solenoid valve to a fuel gas duct. The cutting torch machine includes, on a valve body, connecting nipples for fuel gas, for heating oxygen and for cutting oxygen. Preferably, a heating gas injector is provided within the valve body. In order to increase operation safety, the mixing stage (injector), heating oxygen pressure reducer and solenoid valves are disposed within the valve body, and the mixing stage is connected via the fuel gas solenoid valve to the connecting nipple for fuel gas and via the heating oxygen pressure reducer and the heating oxygen solenoid valve to the connecting nipple for heating oxygen.