Stem seal

Details Stem seal Stem seal

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 41/10 (2006.01) F16J 15/52 (2006.01)

Patent

CA 2172188

A valve stem seal comprising a cylindrical stem-sealing membranes 6 and a membrane supporting flange 7. The membrane has a corrugated profile which defines on or more loop-shaped channels 11 bounded by contact surfaces 13 on a radially inner face and each channel is inclined at 5°-10° with respect to a plane perpendicular to the longitudinal axis. The channels form a labyrinth seal for any fluid leaking along the outer surface of the stem. A support bearing 8 for the stem is provided on the membrane supporting flange.

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