Seal assembly and roller

A seal assembly comprising:

• a primary seal unit which is configured to seal off a first space from a second space, the primary seal unit comprising,
• a guide ring which comprises a first lateral surface having a length,
• a rotating face which is guided on the guide ring,
• a retaining ring which comprises a second lateral surface, the retaining ring being configured to be displaceable relative to the guide ring in a direction of the length of the first lateral surface, and
• a secondary seal which is configured to act between the guide ring and the retaining ring,
• wherein,
• the second lateral surface of the retaining ring is arranged to surround the first lateral surface of the guide ring at least over a part of the length of the first lateral surface;
• and
• a dam seal unit which is configured to delimit the second space from a discharge space and so that a liquid introduced into the second space is dischargable into the discharge space via the dam seal unit.