公开(公告)号：US11801463B2

公开(公告)日：2023-10-31

申请号：US16480376

申请日：2018-04-27

Applicant: HYDAC PROCESS TECHNOLOGY GMBH

Inventor： Ralf Wnuk ,  Thomas Boettcher

IPC: B01D29/66 ,  B01D29/25 ,  B01D29/52

CPC classification number: B01D29/668 ,  B01D29/25 ,  B01D29/52 ,  B01D2201/0453 ,  B01D2201/086 ,  B01D2201/16 ,  B01D2201/325

Abstract: A filter apparatus (10) has a plurality of filter elements (20) in a filter housing (12) having a filter inlet (50) for a fluid to be filtered and a filter outlet (52) for the filtered fluid. A pressure control device (42) has at least one control plate (58) located inside a connection chamber (14). The control plate laterally passes over individual upper element openings (54) of the filter element to be backwashed (20), in a predefinable sequence, covering the opening to an increasing degree and then exposing the opening again. A discharge opening (46) of the backwash device (44) is, at least in part, fluidically connected to a lower element opening (56) of the filter element (20) to be backwashed, as the pressure control device (42) moves towards the upper element opening (54).