Drum Roaster

The roasting procedure for NEPTUNE roasters combines a range of positive characteristics which can be described as follows: The green coffee is filled in batches using the feeding funnel. The roasting supply air is conducted both through as well as around the roasting drum for heating the roasting product. The contained thermal energy is thus applied 1. conductively via the contact of the beans with the roasting drum (approx. 30%) and 2. convectively via the hot roasting supply air flow (approx. 70%). The roasting drum has guide plates which effect a product flow in the opposite direction to the roasting air. The roasting process can be specifically ended by feeding water whereby precooling of the product is also achieved (except NEPTUNE 200). Afterwards, the drum lid opens for emptying the roaster and the roasted coffee cools in the provided cooling sieve gently using ambient or outdoor air.