A seal arrangement (73) is provided in which seal elements (77)
incorporate passages (90) allowing an air flow to be presented to tip
edges (78) of the seal elements, in order to create air suspension and
diminish excessive wear. These passages (90) are created by recesses in
the respective adjacent juxtaposed seal elements (77). In a seal assembly
(71) a seal arrangement (73) is secured within a float chamber (70)
whereby radial movement is allowed to accommodate for movements in the
shaft (72). The radial movement is resisted by a bias created by air flow
(86) into the float chamber (70). The air flow (86) may also be presented
through the passages (90) in order to create the desired air suspension
of the seal elements (77).