Sealing assembly

A method (200) for gas-tight sealing, the method (200) comprising:

• providing (202) a tubular casing unit (110) comprising a first tubular portion (111b) and a second tubular portion (111c) having different maximum outer diameters and a sealing ridge (111a) shaped as a collar that radially extends from an outer side of the tubular casing unit (110), wherein the sealing ridge (111a) is configured to at least partially deform in response to a threshold-exceeding force being applied thereto;
• providing (204) a base unit (120) for receiving the tubular casing unit (110), the base unit (120) comprising a recess portion (121a) arranged for receiving the tubular casing unit (110) via its first end and, having, in its second end, an aperture (121b) configured to allow for the first tubular portion (111b) to at least partially protrude therethrough, wherein the recess portion (121a) has a shape and size configured to accommodate the sealing ridge (111a) and the second tubular portion (111c) in a concentric manner;
• inserting (206) the tubular casing unit (110) into the recess portion (121a) such that the sealing ridge (111a) is placed against its second end and that the first tubular portion (111b) at least partially protrudes through the aperture (121b);
• and
• exerting (208) a force that presses the sealing ridge (111a) against the second end of the recess portion (121a), thereby forming a gas-tight seal between the tubular casing unit (110) and the base unit (120),
• wherein the sealing ridge (111a) is made of material that exhibits plastic deformation upon the threshold-exceeding force being applied thereto and wherein a distal end of the sealing ridge (111a) forms a first sealing contact (122a) with the second end at the recess portion (121a) and/or a second sealing contact (122b) with a side surface of the recess portion (121a), thereby forming said gas-tight seal.