Mechanical Seal and Device with Such a Mechanical Seal

A mechanical seal comprising:

• a first sealing ring comprising a sliding surface and configured to contact with the sliding surface a second sealing ring to form a sealing gap;
• an elastically deformable membrane connected to the first sealing ring at a first connecting location and covering an end face of the first sealing ring;
• wherein the membrane has a side facing away from the first sealing ring and facing a medium space to be sealed, wherein the side facing away from the first sealing ring and facing the medium space is loaded by a pressure in the medium space;
• wherein the membrane comprises a cone section, wherein the cone section adjoins the first connecting location;
• wherein the cone section, in an unloaded state, comprises an axial spacing relative to the end face of the first sealing ring such that the cone section by an elastic deformation contacts more or less, as a function of the pressure in the medium space, the end face of the first sealing ring so that a ratio between a gap-opening force and a gap-closing force relative to each other is adjusted at the sealing gap.