SS, and SB, and PSB and SD, and PSD series centrifugal machine is upper unloading material filter centrifugal machine, stay separation of material by into material tube into high-speed rotating of centrifugal machine turned drum within, in centrifugal machine field of role Xia, material through filter cloth (filter network) achieved filter, liquid phase by out liquid tube discharge, solid is interception in turned drum within, stay turned drum within filter cake reached machine provides of charging volume Shi, stop charging, on filter cake for washing, while will washing liquid filter out, reached separation requirements Hou, downtime, SS, and SB, and PSB series centrifuge cake discharge by hand.