The mixture fluid to be processed are fed to the bowl from feeding pipe ,under the effects of centrifugal force, the solids which has heavier density collects on the bowl wall .it include jams and impurities ,collected in sediment holding space .After a while ,the separated soilds are ejected from the bowl at controlling of PLC .the intervals at which de-slugging have to take place depend on the quality of the mixture fluid .De-slugging include automatic de-slugging ,total de-slugging ,partial de-slugging ,Normally customer don’t need total de-slugging ,put up partial de-slugging under the condition of effects of automatic de-slugging are bad .the interval between two partial de-slugging is up to two minutes ,and electric current is normal .then re-establish the automatic de-slugging interval .The lighter products (lower density )flow along the inner side of the discs into the passage in the upper distributor ,the lighter product is discharged from the machine by the centrifugal pump .Thus the mixture fluid is separated well ,the disc centrifuge adopts self de-slugging and centripetal pump .Thus the machine can work continuously for a long time ,attain good separation effects in long run.