Liquid enters the filter body from inlet and flows through the filter element from inside to outside.Impurity is collected on the internal surface of the wedge wire element.The reducer motor drives scraper blade to remove the impurity continuously.Cleaning takes place without interruption to flow by the rotation of the element against fixed scraper blades.The impurity accumulated during rotation is deposited into the bottom on the filter body from where it can be periodically discharged automatically via the drain outlet.