Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1993-11-26
1996-04-02
Cummings, Scott W.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 2, F16J 1518
Patent
active
055034063
ABSTRACT:
A valve having an assembly for live loading of the packings of the valve. The assembly includes a plurality of large belleville disk springs arranged such that the shaft or stem of the valve extends through the center of the belleville springs, with threaded studs arranged symmetrically with respect to the valve shaft also extending through the belleville springs. Utilizing the larger spring arrangement, a smaller number of springs are required, and favorable deflection characteristics are provided. Preferably, a compression ring is provided having a portion extending up through the belleville disk springs, with this portion including a visual indicator thereon which provides a visual indication that a desired load is achieved as the springs are loaded via hex nuts provided on the threaded studs of the valve assembly.
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Jamesbury Specifications Bulletin W151-5, Wafer-Sphere Butterfly Valves with Live-Loaded Shaft Seals.
Armstrong Leonard T.
Champagne Raymond P.
Cory John M.
Lennon Anthony P.
Cummings Scott W.
Neles-Jamesbury
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