Peerless avoided problems with leaky shaft seals, by encapsulating the entire unit within a pressure vessel.

Back up rings are commonly used with O-rings, lip seals, and as reciprocating shaft seals.

Most garter springs are used for oil seals and shaft seals.

The maneuvering reactor control room is aft at the shaft seals, where it's nice and cool.

External drives require a shaft seal to carry the drive shaft through the pressure vessel wall.

If you get a stem hit, you pop the shaft seals and flood his engine room.

The disadvantage of this type of compressor is a failure of the shaft seals, leading to loss of refrigerant.

Sliding friction is limited to the shaft seals.

It is also used in shaft seals, adhesives, beltings, gaskets and O-rings.

Gaskets and shaft seals were meant to limit loss of oil, but they were usually not expected to entirely prevent it.