The Super Clean Mill is a newly developed pin mill with heavy impact characteristics that satisfies the needs for a GMP in the pharmaceutical and food industries. As a pin mill, it inherits the pulverization characteristics (impact type pulverization, lower heating value, easy adjustment of particle size and simple maintenance) of the Jiyu Mill , it has various devices suitable for GMP such as a shaft seal design to prevent cross contamination, ensuring easy disassembly and cleaning, etc.