Antifriction device for a valve control shaft

Details Antifriction device for a valve control shaft Antifriction device for a valve control shaft

1979-10-09

1981-09-29

Schwadron, Martin P.

Valves and valve actuation

Mechanical movement actuator

Particularly packed or sealed

251306, 251308, 277168, 277177, F16K 122, F16K 4104

Patent

active

042918634

ABSTRACT:
The antifriction device for the control shaft of a flow-regulating valve comprises a hollow body and a closure member rotatably mounted within the hollow body. An annular flange is formed on the control shaft at the level of at least one of the packing gland seals and applied against an annular shoulder of the valve body which surrounds the control shaft, a washer formed of material which is capable of creep deformation being interposed between the flange and the shoulder. A peripheral groove is formed in the shaft opposite to the washer and receives the washer material in the event of creep flow.

REFERENCES:
patent: 3096071 (1963-07-01), Fisher
patent: 3567178 (1971-03-01), Nelson
patent: 3582041 (1971-06-01), Priesc
patent: 3698684 (1972-10-01), Grenier
patent: 3912221 (1975-10-01), Fenster et al.
patent: 4055323 (1977-10-01), Gachot
patent: 4146206 (1979-03-01), Malloy et al.

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