| 摘要 |
The present invention refers to a premounted mechanical seal unit, particularly for a fire extinguishing pump, comprising a rotating seal ring (2), a stationary seal ring (3), the rotating seal ring (2) and the stationary seal ring (3) defining a seal gap (4) thereinbetween, an inner sleeve (5) which is connected to the rotating seal ring (2), an outer sleeve (6) which is connected to the stationary seal ring (3), and a securing element (10) which secures the outer sleeve (6) to the inner sleeve (5), wherein the inner sleeve (5) and the outer sleeve (6) in axial direction (X-X) each have a length greater than a sum of the axial lengths of the rotating seal ring (3), and wherein the inner sleeve (5) comprises a first form closure device (7) on a first axial end and a second form closure device (8) on a second axial end.
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