fill product rotary medium distributor channel 120 through the filler valve in order to clean or sterilize the filler valve itself from the filler valve the cip medium is then conveyed via a cip return line 128 back to the valve cluster 130 through a cip supply line 40 the cip medium can also be channeled from the filler valve cluster 130 to a cip nozzle 42 which is disposed in the upper area of the closed separation container 2 the cip nozzle 42 is for example designed as a 360 u00b0 nozzle so that the entire interior wall of the closed separation container 2 can be impinged with cleaning or sterilization medium in this manner the closed separation container 2 can be fully cleaned by impingement with the cip medium via the outlet 242 and the pump 244 with appropriate switching of the valves the cip medium is returned via a cip return line 44 to the valve cluster 130 the cleaning is thus carried out in a cycle with no medium discharged instead the cleaning medium is recirculated through the closed separation container 2 in the manner described above in an alternative or further embodiment the cip medium can also flow out of the valve cluster 130 into the closed separation container 2 via the relief line 20 in order to enable the cleaning of the relief line 20 fig2 shows schematically the closed separation container 2 in a schematic side representation wherein the sprinkler nozzle 3 in the interior is shown by a.