Low consistency pulp cleaner is widely used to clean for chemical pulping, regenerate pulp from OCC,AOCC,etc. Low consistency cleaner is called for forward direction cleaner,and also called heavy impurity cleaner.Low consistency cleaner is always applied to remove impurity whose dimension is small and density is relatively heavy,such as steel,staple,etc. Low consistency pulp cleaner removes unwanted paticles from pulp and paper stock by conbination of centrifugal force and fluid shear.Therefore,it sparates both on the basis of density difference and particle shape. It work on the particle of a free vortex generated by a pressure drop to develop centrifugal action.The power source is the pump.The pulp enters the cleaner tangentially,the inlet scroll guides the flow to impart a rotating motion.as the stocks flow inward,the velocity increases,resulting in high centrifugal forces near the center which carry dense particles outwart and away from the accept stock.Good fiber is carried inward and upward to accept stock outlet.The dirt ,held in the downard current,continous toward the tip.as the diameter narrows,the flow is forced inward against increasing centrifugal force,which concentrates the dirt and releases good fiber to the accepts flow.