Valves and valve actuation – Mechanical movement actuator – Particularly packed or sealed
Patent
1983-03-24
1985-09-03
Dority, Jr., Carroll B.
Valves and valve actuation
Mechanical movement actuator
Particularly packed or sealed
251312, 277124, 277106, 277215, 267158, 411544, F21K 344
Patent
active
045387907
ABSTRACT:
A valve body has a stem passage rotatably receiving a valve stem. A packing surrounds the stem in the passage and a packing nut threaded on the stem applies axial force to radially expand the packing into sealing engagement with the stem and passage wall. Controlled slippage components interposed between the packing and packing nut allow rotation of the stem and packing nut without any rotational sliding movement against an end face of the packing. A packing support ring engages the end face of the packing adjacent the packing nut and includes a chevron surface for radially expanding the packing. A gland engages the support ring and a pair of reversely positioned spring washers are interposed between the gland and packing nut. During rotation of the stem, packing nut and spring washers, the gland rotates against the packing support ring. The chevron surface of the support ring includes notches for gripping the packing to prevent relative sliding movement therebetween. A handle is attached to the stem by a handle nut, and a spring washer interposed between the handle and handle nut prevents loosening of the handle nut.
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Koch Ulrich H.
Mannion Thomas M.
Williams Peter C.
Yusko Jr. Edward M.
Dority Jr. Carroll B.
Whitey Co.
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