A filtering assembly for filtering at least one fluid particularly circulating in an engine or in hydraulic equipment, comprising: - a filter body; - a tube inside the filter body; - a detachable filtration cartridge, housed in the filter body and comprising: ▪ a first and a second flange (11, 12); ▪ a filtration medium having a tubular opening for surrounding the tube and extending between the first and second flanges (11, 12), the first flange comprising a valve seat, through which at least one orifice passes that communicates with the tubular opening; and ▪ a valve sealing element rigidly connected to the first flange so as to engage with the valve seat, the sealing element being configured to assume at least two positions, namely a closed position, in which the sealing element seals the valve seat, and at least one open position, in which the sealing element allows fluid to pass through the valve seat from a predetermined valve opening pressure threshold; - a return component, separate from the filtration cartridge, configured to act by returning the sealing element to the closed position, the sealing element having a sealing surface, which is in contact with the valve seat in the closed position of the sealing element; - a zone for rigidly connecting the sealing element to the first flange, provided on a side corresponding to the sealing surface, the tube having a free end at least partially forming an edge, characterised in that the sealing element has, opposite the sealing surface, a contact surface with the edge of the tube in said at least one open position, the first flange comprises an opening (16, 55), in which the sealing element is retained, in said rigid connection zone, whilst being translationally movable between a position corresponding to the closed position and a position corresponding to an open position of the valve, the opening (16, 55) being demarcated by a tubular portion, the sealing element comprising a projecting element coming into abutment against an internal shoulder of the tubular portion, in said maximum opening position. - a filter body; - a tube inside the filter body; - a detachable filtration cartridge, housed in the filter body and comprising: ▪ a first and a second flange (11, 12); ▪ a filtration medium having a tubular opening for surrounding the tube and extending between the first and second flanges (11, 12), the first flange comprising a valve seat, through which at least one orifice passes that communicates with the tubular opening; and ▪ a valve sealing element rigidly connected to the first flange so as to engage with the valve seat, the sealing element being configured to assume at least two positions, namely a closed position, in which the sealing element seals the valve seat, and at least one open position, in which the sealing element allows fluid to pass through the valve seat from a predetermined valve opening pressure threshold; ▪ a first and a second flange (11, 12); ▪ a filtration medium having a tubular opening for surrounding the tube and extending between the first and second flanges (11, 12), the first flange comprising a valve seat, through which at least one orifice passes that communicates with the tubular opening; and ▪ a valve sealing element rigidly connected to the first flange so as to engage with the valve seat, the sealing element being configured to assume at least two positions, namely a closed position, in which the sealing element seals the valve seat, and at least one open position, in which the sealing element allows fluid to pass through the valve seat from a predetermined valve opening pressure threshold; - a return component, separate from the filtration cartridge, configured to act by returning the sealing element to the closed position, the sealing element having a sealing surface, which is in contact with the valve seat in the closed position of the sealing element; - a zone for rigidly connecting the sealing element to the first flange, provided on a side corresponding to the sealing surface, the tube having a free end at least partially forming an edge, characterised in that the sealing element has, opposite the sealing surface, a contact surface with the edge of the tube in said at least one open position, the first flange comprises an opening (16, 55), in which the sealing element is retained, in said rigid connection zone, whilst being translationally movable between a position corresponding to the closed position and a position corresponding to an open position of the valve, the opening (16, 55) being demarcated by a tubular portion, the sealing element comprising a projecting element coming into abutment against an internal shoulder of the tubular portion, in said maximum opening position.