| 摘要 |
The present invention relates to a shaft seal (1) comprising a sealing element (14) mounted co--axially to a rotary sealing ring (10) to form a primary seal between opposed faces thereof to substantially prevent fluid flow across the primary seal. The sealing element (14) is urged axially towards the rotary ring (10) by a springs (15) acting between a pusher sleeve (15) connected to the sealing element (14) and a seal housing (19). A secondary seal formed between the pusher sleeve (15) and the housing (19) by a sealing member (20) located in a channel (21) in the pusher sleeve (15).
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