Abstract: A device for injecting gaseous fluid into molten vitreous materials in glass furnaces, or for injecting gaseous fluid which is at risk of condensing within the injection device. The device includes a set of concentric walls, including one external wall which is in contact with the molten glass, and one internal wall which is formed by a tube which is axially arranged and guides the gaseous fluid to the end of the device which is dipped into the molten vitreous material, and a cooling circuit based on the flow of a cooling fluid within the device. The internal wall of the tube for injecting the gaseous fluid does not form a wall which is in contact with the cooling fluid flowing within the device.

Abstract: The invention relates to a glazing unit, in particular an insulating glazing unit, comprising at least a first (5) and a second (5) glass sheet joined together via at least one spacer (8) that keeps them a certain distance apart from each other and, between said at least two glass sheets, at least one internal space (4) closed by a peripheral seal (101) placed on the periphery of the glass sheets, around said internal space, the seal having a U-shaped cross section comprising a first flange (ion) securely fastened to the first glass sheet and a second flange (1012) securely fastened to the second glass sheet. According to the invention, the first flange is securely fastened in a first recess (521) produced in the edge face of the first glass sheet.