it is a combination of a solid bowl decanter centri- fuge and a screen worm centrifuge with exceptiona dewatering results in the decanter component,the feed suspension is first prethickened.i.e.it is extensively dewatered in the conical part of the solid bowl The liquid is clari- fied in the cylindrical part and finally discharged .The pre-thickened solids are transported into the cylindrical screen section by the worm where addi- tional dewatering is achieved This centrifuge is particularly applicable for the solid-liquid separation in chemical pharmaceutical and other industries.It features large processing capacity and low moisture rate of solid content.Es pecially for conditions that mother liquid with low solid concentration or mother liquid with small amount of oil substance.with better effect