Since the introduction of the HVOF process by J. Browning in 1982, gun design and spraying parameters have changed to achieve increasing gas resp. particle velocities. One exeption among the up-to-date HVOF systems is the GTV K2 Burner System. From the very first design study, special attention was payed to optimum heat management within the gun. This article discusses the principles of HVOF burner system, that is designed with special regard to heat management, illustrates gun behavior, and describes the results of various GTV K2 applications. The discussion covers the processing of fine powder grades, low melting materials, and oxidization sensitive materials. It is concluded that, solely in case of the K2, the injected kerosene is completely burned inside the combustion chamber.

The EC Machine Directive entails consequences in correlation for mechanical engineering in general with regarding the safety for people and for the environment. A few components which should be taken into consideration for the safe operation of thermal-spraying installations are explained in the contribution. The technical functioning and working modes of gas warning sensors, return protective devices and a programmable controller as a possible safety device are described. The objective is to awaken a certain degree of sensitisation on the part of the practice-oriented user to indispensable safety components in modern spraying-installation technology. Paper text in German.