Valves and valve actuation – Mechanical movement actuator – Particularly packed or sealed
Patent
1992-12-11
1994-08-16
Walton, George L.
Valves and valve actuation
Mechanical movement actuator
Particularly packed or sealed
277 27, 277125, 277142, F16K 4100
Patent
active
053380045
ABSTRACT:
A valve sealing apparatus including a valving member, a valve bonnet having a continuous bore that communicates with the valving member, a valve shaft housed within the bore of the bonnet, a primary sealing member positioned in the bore of the valve bonnet which surrounds the valve shaft, and an annular ring positioned between the wall of the valve shaft and the wall of the bonnet for pressing into the face of the primary sealing member, for imparting a downward force on the primary sealing member, in order to prevent horizontal fluid flow between the valve body and the wall of the valve shaft on both the upper and lower faces of the primary sealing member, and a spring associated with the valve bore for maintaining force on the primary sealing member in order to maintain the primary seal. The invention also provides an embodiment including components for retrofitting an existing valve by replacing packing with a plurality of sealing wafers and a metal sealing ring, which together form the horizontal fluid seal among the components.
REFERENCES:
patent: 3443816 (1969-05-01), Saleri et al.
patent: 3559950 (1971-02-01), Nelson
patent: 3830508 (1974-08-01), Endicott
patent: 4572519 (1986-02-01), Cameron et al.
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