The drum roasting process in detail

The heart of PROBAT’s Px 120 drum roaster is a horizontally lying roasting drum which is  equipped with a rotary drive. Shovel blades circulate the coffee beans during the roasting process. The flame of a burner generates the energy for the roasting air which is guided both through as well as around the roasting drum by means of flaps. As such, heat is applied through conduction via the bean’s contact with the roasting drum as well as through convection via the hot incoming air.


Performance Data

Px 120
Roasting times (min)
Roasting capacity (kg/h)
Batch size (kg)


Best Life-Cycle Costs and Performance


The Px 120 drum roaster is equipped with the PILOT Roaster Excellence 2020 control system. It is a web-based application, which features an intuitive HMI, enabling roasters to modify vital roasting parameters by touch. The application is programmed using modern web technologies, which allow access from different devices and operating systems.

  • Fully automatic control system
  • New touch-optimized HMI with intuitive user guidance
  • Recipe management with flexibly definable recipes; settings that have been saved are reproduced safely and automatically
  • Reflex Automatic function: reproducibility of roasting profiles by eliminating external influences such as varying batch sizes, green coffee moisture or ambient temperature
  • Overview of all key roasting parameters and temperature curves
  • All data relevant to production are saved, allowing it to be accessed and analyzed at any time
  • Transparent presentation of the system’s operating status in real time
  • Web-based application which allows access from different devices and operating systems
Environment and Cost-Effectiveness

Different PROBAT systems make it possible to clean and reuse the thermal energy released during the roasting process. They are specifically tailored to the respective roasting process.

  • Energy savings through partial recirculation of roasting exhaust air
  • Energy savings and increased production through green coffee preheating (optional)
  • Reduction of product-specific odors and visible roasting exhaust gases
  • Reduction of emissions and adherence to local thresholds through modular exhaust air treatment systems
  • Maximum cleaning efficiency thanks to the Proforte exhaust air treatment system (flameless, renewable, thermal oxidation)
  • Energy monitoring for cost transparency
  • Heat recovery through use of heat exchangers
  • Minimal heat loss due to particularly well insulated roasting system
  • Thermal cleaning cuts human resource costs and saves time

PROBAT safety technology goes far beyond standardized requirements. We offer safety components that guarantee maximum process security.

  • Ensuring the functional safety of your processing systems
  • Flexibility thanks to a multistep safety system and the use of safety PLCs
  • Maintenance-friendly safety components
  • Thermal cleaning minimizes deposits and risk of fire
  • Monitoring of cooling exhaust air temperature via thermocouple
  • Safe processing of extremely dark roasts and demanding green coffee
  • Battery and water buffers increase operation safety