The new Pneumatic System SD-250 is the ultimate solution for who has the need to mill without stopping the production for several hours in a day. The application of this system allows the improvement of Combi Junior performances, making it a real professional Stone Milling Plant, small and simple to use. The Pneumatic System permits to maintain low temperatures of flours thanks to the high air volume which flows through the grinding chamber. Moreover, this system allows to maintain the work place clean and powderless, as the Mill is kept in depression and the air is filtered before being discharged in the environment. Energy consumptions are contained in 1.12 KW, the system can be supplied with single-phase 230 Volt motor or with three-phase 400 Volt motor. The Pneumatic System is available as a kit and can be coupled to all Combi Junior milling plants that have been manufactured since the year 2013.