公开(公告)号：US20240252962A1

公开(公告)日：2024-08-01

申请号：US18692266

申请日：2022-09-19

Applicant: HYDAC Process Technology GmbH

Inventor： Bernhard Schlichter ,  Jörg Hermann Gerstner ,  Manfred Deutschmeyer ,  Dimitri Bugrov

IPC: B01D36/02 ,  B01D24/08 ,  B01D24/46 ,  B01D29/15 ,  B01D29/68 ,  B01D39/02

CPC classification number: B01D36/02 ,  B01D24/08 ,  B01D24/4636 ,  B01D29/15 ,  B01D29/682 ,  B01D39/02 ,  B01D2239/0428

Abstract: The invention relates to a filter apparatus, in particular in the form of a hollow cylinder (10) having a filter material (12), characterized in that a pre-filter (16) is mounted upstream of a surface filter (14) in the flow direction of a fluid stream to be cleaned from particulate contaminants, which pre-filter comprising a bulk material (18) for increasing the effective surface of the filter material (12), which bulk material is received between delimiting layers (20, 22) which are in each case provided with holes for fluids, the opening width of which is smaller than the diameter of a single grain (24) of the bulk material (18).