Typical Marine bulkhead seals today utilize a non-metallic seal ring of some kind to seal between the shaft and the seal housing mounted to the bulkhead. The sealing feature can occur continuously, or be actuated when needed. These arrangements can fail to work effectively in practice for a variety of reasons. This paper discusses segmented carbon seals as a viable sealing method Test results are presented, as well as proposed mounting arrangements. A discussion of circumferential seals in general is included.

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