Stem seal

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 DEG -10 DEG with re...

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Bibliographic Details
Main Authors NICHOLSON, TERENCE PETER, TOZER, MICHAEL JOHN CASWELL
Format Patent
LanguageEnglish
French
German
Published 17.05.2000
Edition7
Subjects
ACTUATING-FLOATS
BLASTING
COCKS
CYLINDERS
DEVICES FOR VENTING OR AERATING
ENGINEERING ELEMENTS AND UNITS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LIGHTING
MECHANICAL ENGINEERING
PISTONS
SEALINGS
TAPS
THERMAL INSULATION IN GENERAL
VALVES
WEAPONS
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Summary: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 DEG -10 DEG 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.
Bibliography:Application Number: EP19960301575