Conveyor dryer Conveyor dryer mfgr by DUEX is SS 304 based for food drying of various sizes be it grain, spices, fruits or vegetables. Conveyor dryer also known as tunnel dryer comes in standard length of 10 / 15 / 20 ft and as per requirement DUEX mfgr conveyor dryer has range from 50 kG/ hr to 5000 kG per hr capacity