Sealing arrangement , comprising: - a first machine part and a second machine part , which are arranged at a distance from one another to form a sealing gap and are movable relative to one another in a rotational manner about a movement axis ; - a radial shaft sealing ring for sealing a high-pressure side H of the sealing gap , which can be pressurized with a fluid, against a low-pressure side (N) of the sealing gap, having a foot portion which is held on a seal holding structure of the first machine part and having a sealing head which can be flexibly deflected in the axial direction relative to the foot portion and which bears in a prestressed sealing manner on a sealing surface of the second machine part , characterized in that the sealing surface has a first sealing surface portion adjoining the high-pressure side H and a second sealing surface portion adjoining it in the axial direction and adjoining the low-pressure side N, wherein the first sealing surface portion extends radially away from the seal holding structure in the direction of the low-pressure side (N) and encloses an acute angle α with the axis of movement , wherein the sealing head is applied to the first sealing surface portion when the high-pressure side H is pressurized with an operating pressure p w that is less than a predetermined limit operating pressure value p limit , and wherein the second sealing surface portion extends radially in the direction of the seal holding structure of the first machine part in the direction of the low-pressure side N and forms an axial stop for the sealing head on which the sealing head is applied in a sealing manner in the axial direction when the high-pressure side H is pressurized with an operating pressure p w that is equal to or greater than the limit operating pressure value p limit . - a first machine part and a second machine part , which are arranged at a distance from one another to form a sealing gap and are movable relative to one another in a rotational manner about a movement axis ; - a radial shaft sealing ring for sealing a high-pressure side H of the sealing gap , which can be pressurized with a fluid, against a low-pressure side (N) of the sealing gap, having a foot portion which is held on a seal holding structure of the first machine part and having a sealing head which can be flexibly deflected in the axial direction relative to the foot portion and which bears in a prestressed sealing manner on a sealing surface of the second machine part , characterized in that the sealing surface has a first sealing surface portion adjoining the high-pressure side H and a second sealing surface portion adjoining it in the axial direction and adjoining the low-pressure side N, wherein the first sealing surface portion extends radially away from the seal holding structure in the direction of the low-pressure side (N) and encloses an acute angle α with the axis of movement , wherein the sealing head is applied to the first sealing surface portion when the high-pressure side H is pressurized with an operating pressure p w that is less than a predetermined limit operating pressure value p limit , and wherein the second sealing surface portion extends radially in the direction of the seal holding structure of the first machine part in the direction of the low-pressure side N and forms an axial stop for the sealing head on which the sealing head is applied in a sealing manner in the axial direction when the high-pressure side H is pressurized with an operating pressure p w that is equal to or greater than the limit operating pressure value p limit . <EOS>