Built-in agitators are agitators for installation from above onto a suitably dimensioned agitator nozzle or agitator flange. The agitators shown here are i.d.R. used for homogenizing, circulating and levitating. Agitators are a central component of the storage technology in most dosing systems. Here, agitators, in combination with a pipeline designed for circulation, ensure homogeneity of the raw materials and thus high quality during dosing. Subsequent QC measures (night sounds, etc.) are significantly reduced with the correct process engineering design of the storage system.