Balanced mechanical seal assembly

Details Balanced mechanical seal assembly Balanced mechanical seal assembly

2008-05-13

2008-05-13

Engle, Patricia (Department: 3673)

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

C277S370000

Reexamination Certificate

active

10791514

ABSTRACT:
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.

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