VALVE STEM PACKING ASSEMBLY

A valve body (B) has a stem passage rotatably receiving a valve stem (C). A packing (52) surrounds the stem in the passage and a packing nut (100) threaded on the stem applies axial force to radially expand the packing into sealing engagement with the stem and passage wall. The packing comprises co-...

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Bibliographic Details
Main Authors WILLIAMS, PETER CHARLES, KOCH, ULRICH HUBERT, MANNION, THOMAS MICHAEL, YUSKO, EDWARD MICHAEL, JR
Format Patent
LanguageEnglish
Published 18.09.1985
Edition4
Subjects
ACTUATING-FLOATS
BLASTING
COCKS
DEVICES FOR VENTING OR AERATING
ENGINEERING ELEMENTS AND UNITS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LIGHTING
MECHANICAL ENGINEERING
TAPS
THERMAL INSULATION IN GENERAL
VALVES
WEAPONS
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Summary:A valve body (B) has a stem passage rotatably receiving a valve stem (C). A packing (52) surrounds the stem in the passage and a packing nut (100) threaded on the stem applies axial force to radially expand the packing into sealing engagement with the stem and passage wall. The packing comprises co- operating first and second packing members (60, 62) engaging at angularly disposed slippage surfaces for translation of compressive axial forces into radial expansion and sealing engagement with the stem and with the passage wall. A packing support ring (50) engages the end face of the packing adjacent the packing nut. A gland (58) engages the support ring (50) and a pair of reversely positioned spring washers (90a, 90b) are interposed between the gland and the packing nut. A handle (102) is attached to the stem by a handle nut (106), and a spring washer (90c) interposed between the handle and the handle nut prevents loosening of the handle nut.
Bibliography:Application Number: EP19840304537