Sealing arrangement , comprising: - a first and a second machine part which are arranged at a distance from one another to form a sealing gap and can be moved relative to one another about a movement axis ; - a sealing element having a base portion which is retained on a seal retaining structure, in particular a retaining groove , of one of the two machine parts , and having a sealing head with an end face that is convex in cross section, a sealing portion of which sealing head rests against a sealing surface of the other machine part in question in a dynamically sealing manner in order to seal off a high-pressure side H of the sealing gap that can be pressurized with a fluid from a low-pressure side N, characterized in that the sealing portion comprises a tread which extends away from the sealing head at the end face and which is provided with a continuous tread surface , the sealing element being provided, on the high-pressure side, with at least one flow element in the form of - a groove which is arranged on the end face and is designed to be open toward the sealing surface , and which is fluidically connected on the sealing-portion side to a circumferential groove in the sealing head , or - a through-hole which is open at both ends and which is fluidically connected on the sealing-portion side to a circumferential groove in the sealing head ; or - a profile extension which extends away from the sealing head and through which a flow of fluid is brought about when the two machine parts move relative to one other, such that the fluid flows against the sealing head on the high-pressure side in the region of its sealing portion . - a first and a second machine part which are arranged at a distance from one another to form a sealing gap and can be moved relative to one another about a movement axis ; - a sealing element having a base portion which is retained on a seal retaining structure, in particular a retaining groove , of one of the two machine parts , and having a sealing head with an end face that is convex in cross section, a sealing portion of which sealing head rests against a sealing surface of the other machine part in question in a dynamically sealing manner in order to seal off a high-pressure side H of the sealing gap that can be pressurized with a fluid from a low-pressure side N, characterized in that the sealing portion comprises a tread which extends away from the sealing head at the end face and which is provided with a continuous tread surface , the sealing element being provided, on the high-pressure side, with at least one flow element in the form of - a groove which is arranged on the end face and is designed to be open toward the sealing surface , and which is fluidically connected on the sealing-portion side to a circumferential groove in the sealing head , or - a through-hole which is open at both ends and which is fluidically connected on the sealing-portion side to a circumferential groove in the sealing head ; or - a profile extension which extends away from the sealing head and through which a flow of fluid is brought about when the two machine parts move relative to one other, such that the fluid flows against the sealing head on the high-pressure side in the region of its sealing portion . <EOS>