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); - a non-rotatable part for rotatingly supporting the rotatable part , the non-rotatable part extending around said axis (A) 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 (D1) around said axis (A), the second annular sealing arrangement being located at a second diameter (D2) around said axis (A), the first diameter (D1) being different from the second diameter (D2), 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); - a non-rotatable part for rotatingly supporting the rotatable part , the non-rotatable part extending around said axis (A) 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 (D1) around said axis (A), the second annular sealing arrangement being located at a second diameter (D2) around said axis (A), the first diameter (D1) being different from the second diameter (D2), 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 <EOS>