Sealing arrangement, comprising: - a first and a second machine part (12, 14) 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 (12, 14), 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 (12, 14) 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 (66, 68, 92, 94) 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 (12, 14) 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 (12, 14) 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 (12, 14), 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 (12, 14) 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 (66, 68, 92, 94) 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 (12, 14) 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.