Apparatus for fixing the position of a valve element shaft in a

Details Apparatus for fixing the position of a valve element shaft in a Apparatus for fixing the position of a valve element shaft in a

1986-08-01

1987-04-21

Walton, George L.

Valves and valve actuation

Mechanical movement actuator

Particularly packed or sealed

251308, 277105, 277123, 403261, 403326, F16K 4102, F16K 122

Patent

active

046590641

ABSTRACT:
An apparatus for fixing the longitudinal position of a shaft, e.g., a valve stem, within the bore of a body, e.g., a valve body comprising a shaft having a plurality of peripherally extending, generally equally spaced, discrete grooves, the grooved portion of the shaft being received in the bore, a stop being provided internally of the bore, a washer having an inwardly tapered abutment surface engaging the stop, a split ring received on the shaft and engaging the inwardly tapered abutment surface, the apparatus further including a gland assembly including a second washer for engagement with the first washer, the gland assembly urging the second washer against the first washer, the split ring being forced into engagement with the abutment surface and into a groove adjacent the abutment surface. The apparatus is particularly useful in fixing the position of the stem in a butterfly valve to prevent a longitudinal force acting on the valve stem from forcing the disk out of its centered disposition with respect to the valve seat.

REFERENCES:
patent: 3149524 (1964-09-01), Vecchi
patent: 3425439 (1969-02-01), Duffey et al.
patent: 3588154 (1971-06-01), Voight et al.
patent: 3602340 (1971-08-01), Budzich et al.
patent: 3666234 (1972-05-01), Scaramucci
patent: 4225263 (1980-09-01), Asberg
patent: 4270730 (1981-06-01), Hinrichs
patent: 4411438 (1983-10-01), Scobie
patent: 4420140 (1983-12-01), Gachot
patent: 4457490 (1984-07-01), Scobie
patent: 4541612 (1985-09-01), Yohner

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