| 摘要 |
A mechanical seal for providing a fluid-tight seal between a rotating shaft and a stationary housing comprises a first pair of seal members for sealing and separating a process fluid from a barrier fluid and a shuttle. The first pair of seal members comprises a first rotatable seal ring having a rotary seal face and a first stationary seal ring having a stationary seal face engaging the rotary seal face. The shuttle member is positioned relative to the rotary seal ring or the stationary seal ring and axially movable between a first position and a second position in response to changing pressure conditions within the mechanical seal thereby maintaining the mechanical seal regardless of the change in pressure conditions. |
