A connection device intended to be used in a vehicle having at least one wheel provided with a tyre, the connection device comprising: - a rotatable part intended to be installed in a fixed position relative to the wheel, the rotatable part extending around an axis; - a non-rotatable part for rotatingly supporting the rotatable part, the non-rotatable part extending around said axis and being at least partially surrounded by the rotatable part; - an annular chamber defined between the rotatable part and the non-rotatable part, the annular chamber allowing fluid communication between at least one conduit provided in the rotatable part and at least one duct provided in the non-rotatable part, so that the tyre may be inflated by sending pressurized air from the non-rotatable part to the rotatable part; - a first annular sealing arrangement and a second annular sealing arrangement delimiting the annular chamber, the first annular sealing arrangement being located at a first diameter around said axis, the second annular sealing arrangement being located at a second diameter around said axis, the first diameter being different from the second diameter, wherein the first annular sealing arrangement comprises a first annular air seal and the second annular sealing arrangement comprises a second annular air seal, the first annular air seal and the second annular air seal at least partially delimiting the annular chamber, the first annular air seal and the second annular air seal being configured to prevent air leaks from the annular chamber, and said connection device further comprising - an annular dust seal located radially externally of the second sealing arrangement at an interface region between the non-rotatable component and the rotatable component, so as to prevent dust from contaminating the second annular air seal characterised in that a lubricant chamber is defined in a position adjacent to the annular dust seal, the lubricant chamber being configured to contain a lubricant in order to keep the annular dust seal lubricated. - a rotatable part intended to be installed in a fixed position relative to the wheel, the rotatable part extending around an axis; - a non-rotatable part for rotatingly supporting the rotatable part, the non-rotatable part extending around said axis and being at least partially surrounded by the rotatable part; - an annular chamber defined between the rotatable part and the non-rotatable part, the annular chamber allowing fluid communication between at least one conduit provided in the rotatable part and at least one duct provided in the non-rotatable part, so that the tyre may be inflated by sending pressurized air from the non-rotatable part to the rotatable part; - a first annular sealing arrangement and a second annular sealing arrangement delimiting the annular chamber, the first annular sealing arrangement being located at a first diameter around said axis, the second annular sealing arrangement being located at a second diameter around said axis, the first diameter being different from the second diameter, wherein the first annular sealing arrangement comprises a first annular air seal and the second annular sealing arrangement comprises a second annular air seal, the first annular air seal and the second annular air seal at least partially delimiting the annular chamber, the first annular air seal and the second annular air seal being configured to prevent air leaks from the annular chamber, and said connection device further comprising - an annular dust seal located radially externally of the second sealing arrangement at an interface region between the non-rotatable component and the rotatable component, so as to prevent dust from contaminating the second annular air seal