Heinkel USA offers the HF & F model centrifuges which incorporate inverting filter technology, thin cake filtering and PAC® direct contact drying of the material all in one machine for separation/filtration providing tremendous processing and cost savings advantages. With these combinations of technologies, it is possible to dry product inside of the gastight centrifuge, thereby reducing overall drying cycle time or eliminating downstream drying equipment. This centrifuge is the first with a filter cloth that is axially moveable. This allows the filter cloth to be inverted while under rotation which completely discharges the solids, leaving the filter cloth free of residual heel while maintaining a totally-enclosed gastight system. Other advantages include no residual heel remains on the filter cloth, repeatable batch quality and full flexible process recipe management.