Compression Ring Having Butt Seal, and Method

A compression ring, comprising:

• a ring running surface on a first butt end region,
• a ring running surface on a second butt end region,
• a ring inner surface.
• a top ring flank surface and
• a bottom ring flank surface.
• wherein the ring has overlapping butt end regions,
• wherein the first butt end region has at least one protrusion in the circumferential direction, and the second butt end region has at least one recess in the circumferential direction,
• wherein the at least one protrusion forms at least one axial and/or radial overlap surface, and the at least one recess forms at least one parallel surface, which lies at least partially opposite to the axial and/or radial overlap surface in order to shift parallel to one another in response to a change of the butt play,
• wherein at least one of the surfaces, which can be shifted parallel to one another, is provided with an axial wear element and/or with a radial wear element,
• wherein the wear element is made of a temperature-resistant metallic material,
• wherein the material of the wear element has a lower wear resistance than the base material of the compression ring.