END PLATE, FILTER ELEMENT, FILTER SYSTEM AND METHOD FOR FILTERING LIQUID
An end plate for filter material for filtering a liquid, particularly a hydraulic oil, having a through opening for filtered liquid, which is surrounded by a sealing ring for a connecting piece, and a cover for the filter material. The sealing ring delimits a free space for accommodating an anti-rotation lock of a switch and/or a bypass valve of a filter system. Furthermore, a filter element, a filter system and a method for filtering liquid are also disclosed.
1 . An end plate for filter material for filtering a liquid, particularly a hydraulic oil, having a through opening for filtered liquid, which is surrounded by a sealing ring for a connecting piece, and a cover for the filter material,
wherein
the sealing ring delimits a free space for accommodating an anti-rotation lock a switch and/or a bypass valve of a filter system.
2 . The end plate according to claim 1 ,
wherein
the free space forms an accommodating pocket, which extends between the sealing ring and the cover and has a base.
3 . The end plate according to claim 1 ,
wherein
the annular space, the accommodating pocket in particular, is of annular construction.
4 . The end plate according to claim 1 ,
wherein
the cover has an inner ring, wherein the accommodating pocket is constructed between the sealing ring and the inner ring.
5 . The end plate according to claim 4 ,
wherein
the inner ring forms a positioning ring for a support tube.
6 . The end plate according to claim 1 ,
wherein
the free space has a depth in the axial direction with respect to the longitudinal extent of the sealing ring, which at least corresponds to the penetration depth of the anti-rotation lock.
7 . The end plate according to claim 6 ,
wherein
the sealing ring has an upper edge, wherein the depth of the free space is at least 5 mm, particularly at least 10 mm, in particular at least 15 mm from the upper edge of the sealing ring.
8 . The end plate according to claim 1 ,
wherein
the free space has a width in the radial direction starting from the sealing ring, which is at least 2 mm.
9 . A filter element for filtering a liquid, having an end plate according to claim 1 and a filter material which is arranged on the cover and surrounds the through opening at the circumference thereof.
10 . The filter element according to claim 9 ,
wherein
a support tube is arranged on the inner side of the filter material and connected to the end plate.
11 . A filter system having a filter element according to claim 9 , a filter housing, in which the filter element is arranged, and a filter head with connections, which is connected to the filter housing, wherein the filter head has an anti-rotation lock, which is connected to a switch and/or a bypass valve, wherein the filter head and the free space of the end plate form an interface.
12 . The filter system according to claim 11 ,
wherein
the bypass valve in the switched state connects the inlet side of the filter head and the outlet side of the filter head.
13 . The filter system according to claim 11 ,
wherein
the switch comprises a reed contact for generating a signal for a contamination indicator.
14 . A method for filtering liquid, in which liquid to be filtered is supplied to a filter system according to claim 11 , filtered in the filter material and discharged through the through opening of the end plate as filtered liquid, wherein the switch and/or the bypass valve is actuated from a differential limit pressure between the liquid to be filtered and the filtered liquid.