A drum roaster which rotates on a horizontal axis is the most conventional method of roasting coffee as well as the traditional form of slow roasting coffee. The PROBAT drum roaster system NEPTUNE is the culmination of the development of traditional slow-roasted coffee. Exquisite slow-roasts can be guaranteed with capacities of 1,500 and 3,000 kilogram/hour (kg/h). The NEPTUNE roaster’s different designs and extensive variety of configurations allow it to meet the most diverse range of customer requirements.
Where coffee is roasted anywhere between 8 and 20 minutes, the thermal energy generated in the NEPTUNE roasters is transferred to the coffee beans over a longer period of time, resulting in the coffee beans developing highly intense flavor. The different methods available to influence the roasting profile make these roasters ideal for espresso beans and special coffees with particularly intense flavor.
The NEPTUNE not only stands out thanks to its impressive quality, but also thanks to its remarkable functionality: The variable emptying speed reduces cycle times, whereas the special shovel mechanism provides optimal blending while handling the product with care. Effective cooling guarantees constant product quality. The burner temperature is infinitely variable; the optimum utilization of thermal energy reduces energy consumption.
The heart of PROBAT’s NEPTUNE drum roasters 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. The addition of water systematically ends the roasting process while simultaneously precooling the roasted coffee.
The roasting times of the NEPTUNE drum roasters lie between 8 and 20 minutes. As heat is applied to the coffee beans over a longer period, a particularly high level of flavor is developed. NEPTUNE drum roasters offer this and many other benefits:
All NEPTUNE drum roasters are equipped with the PILOT Roaster Excellence control system. In this context, high-quality hardware and software guarantee maximum production reliability. Customers can choose between various PLC-solutions and visualization concepts according to their individual demands.
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.
PROBAT safety technology goes far beyond standardized requirements. We offer safety components that guarantee maximum process security.