A new model 15X15-SS low-profile Rotary De-Clumper from Munson Machinery reduces agglomerates and friable materials being discharged from process equipment, storage vessels and shipping containers. Material entering the 15-inch square inlet is reduced in size by dual rotors with three-point, single-piece, stainless steel breaking heads rotating with minimum clearance inside a curved, perforated bedscreen. On-size material exits through apertures in the bedscreen ranging from 1/32 to 2-1/2 inches in diameter. Powered by a 3 HP motor with gear reducer and serpentine timing drive, the synchronized shafts rotate at approximately 100 RPM to avoid heating the product. Both the rotor assembly and the bedscreen can be removed rapidly for cleaning or replacement. At 11 inches high, the unit is designed to fit in restricted spaces between bulk storage, handling, processing and packaging equipment. With optional feed hoppers and support structures, it can also operate independently. The unit is recommended for de-lumping of free- or non-free-flowing bulk materials such as salt, sugar, spices and resins, and size reduction of easy-to-break materials such as friable food products, and other compacted powders. The unit is built to withstand heavy usage and is simple to maintain; bearings can be lubricated through external fittings and are isolated from the product processing area with multiple labyrinth air purge seals.