Closing system for a container of a filtering device

A container (403) for filtering devices, comprising:

• a tubular lateral wall (405),
• a bottom plate (406) which closes a first axial end of said tubular lateral wall (405), and
• a closing system (500) configured to close, in an openable fashion, a second and opposite axial end of said tubular lateral wall (405),
• wherein said closing system (500) comprises:
• an occlusion element (501), which comprises a cylindrical lower portion (502) configured to be coaxially inserted into the tubular lateral wall (405) and an upper portion (507) from which one or more abutment elements (508) project, said one or more abutment elements (508) resting on an edge of the second axial end of the tubular lateral wall (405),
• one or more annular seats (503) obtained coaxially on an outer lateral surface of the cylindrical lower portion (502) of the occlusion element (501) and singularly configured to receive an annular sealing gasket (504) providing a radial sealing between the cylindrical lower portion (502) of the occlusion element (501) and the tubular lateral wall (405), and
• a tightening member (517) comprising at least one abutment surface (519) resting on the upper portion (507) of the occlusion element (501) on an opposite side with respect to the bottom plate (406) and a ring nut (518) configured to surround the occlusion element (501) and to be axially constrained to an exterior of the tubular lateral wall (405), at the second axial end thereof, in order for the tightening member (517) to axially lock the occlusion element (501) in the position in which the abutment elements (508) rest on the edge of the second axial end of the tubular lateral wall (405).