PETROCAPITAL has studied and designed combustion heads for particular applications, including those dedicated to asphalt mixing plants. For these types of systems, the variables to be considered are various: depression, rotational movement of the material that causes combustion problems. The forty years of experience of PETROCAPITAL technicians has made it possible to achieve an optimal level of "combination" even for these systems: the study of the particular flame geometry has led to a high reference and operational standard. Flame development inside the cylinder may even reach up to nine metres.