Ring seal

A ring seal for sealing a gap between two parts that can be moved axially relative to one another, having

• a cross-sectional profile which is constant in the circumferential direction and has a symmetrical design with respect to a radially oriented axis of symmetry (S), and
• a dynamic sealing surface arranged radially outside or radially inside on the cross-sectional profile, and
• a groove base area arranged radially opposite the sealing surface,
• wherein the sealing surface has a first central section (I) having, in the cross-sectional profile, a radius R of R<B/2 with respect to an axial width B of the ring seal,
• wherein the sealing surface further has a second and third section (II, III) which enclose the first central section (I) between them,
• wherein the sealing surface in the region of the second and third sections (II, III) is embodied as a planar annular surface in each case, which is aligned at an angle (α) of 60 to 85 degrees with respect to the axis of symmetry (S) of the cross-sectional profile,
• wherein starting from the second and third sections (II, III), the sealing face transitions into a side face in each case,
• wherein the side faces are oriented at an angle (β) of 5 to 30 degrees to the axis of symmetry (S),
• wherein the ring seal is tapered in a region between the side faces and the groove base area, and
• wherein the region of the ring seal that is tapered is formed by two opposing concave recesses and thereby has a reduced width (B2) at a narrowest point of the region of the ring seal that is tapered.