Balanced circumferential seal

A machine comprising:

• an outer member;
• an inner member mounted for rotation about an axis relative to the outer member;
• and
• a seal system comprising:
• a seal housing mounted to the outer member;
• one or more seal rings held by the seal housing and having an inner diameter surface;
• and
• a seal runner mounted to the inner member and having a first outer diameter surface portion contacting or facing the inner diameter surface of the one or more seal rings,
• wherein:
• the seal runner has;
• a circumferential array of mounting features, each comprising one or more mounting holes;
• a mounting section mounted to the inner member;
• a sealing section including the first outer diameter surface portion radially outwardly spaced from the mounting section;
• a first hub between the mounting section and the sealing section;
• a balancing section including the one or more mounting holes of the mounting features of the circumferential array or mounting features;
• and
• a second hub between the mounting section and the balancing section;
• the first hub and the second hub are angled off-radial in the same direction from the mounting section to the sealing section and the balancing section, respectively;
• and
• one or more weighs are mounted to one or more of the mounting features of the circumferential array of mounting features.