Patent ID: 8770928

Claim:
A seal assembly for an air cycle machine comprising: an insulator seal plate having a bore; a seal having an outer diameter engaging the bore and an inner diameter provided between lateral sides defining a first width, the inner diameter providing a seal land configured to engage a rotating surface, the outer diameter to the inner diameter providing a first ratio of 1.30-1.31, and the inner diameter to the first width providing a second ratio of 1.59-1.61, wherein the seal is constructed from a polyimide; and wherein the seal has an annular base extending radially outward from the seal land and including a second width, the first width to the second width providing a third ratio of 1.46-1.53, wherein the second width is nominally about 0.405 inch, the annular base received in a snap-fit relationship with respect to the insulator seal plate.