Number of chemicals as well as food products are preserved and used in powder form . In chemicals inorganic chemicals , pharmaceutical powders whereas in food , egg powder milk powder and fruit powder is to be dried. Here drying is uniform so powder is dried fully and uniformly. Also as heat generated is fully utilized heating is faster than other regular heating equipments. Products are safe because smell, test of food product, color remain unchanged. Different technological options are available depending upon requirements of clients like continuous conveyor dryer , hot air assisted dryer etc.