In case of a future expansion plan, the dryer cooler is advantageous as it has a modular type of construction that provides ﬂexibility to increase capacity. The machine comes with one feed module and an unload one with additional intermediate modules for drying and cooling. Because of the aforementioned ﬂexibility of its modular construction, drying or cooling modules can be increased in numbers. In order to increase efﬁciency, each module is sealed so that there is zero mixing of air. It also has a continuous chain with S.S or galvanised M.S trays to carry material. Every tenth tray has a heat resistant rubber scraper. These are meant for self-cleaning of ﬁnes that accumulate below on the return side of the chain and the bottom plate. Specially designed perforated trays are provided to give optimum area for ﬂow of hot and cold air. At the same time, these trays help maintain air pressure and the required velocity. This helps clean the material accumulated between the carrying and returning sides of trays.