Valves and valve actuation – Rotary valves – Butterfly
Patent
1976-10-26
1979-01-09
Cline, William R.
Valves and valve actuation
Rotary valves
Butterfly
251368, F16K 1226
Patent
active
041335139
ABSTRACT:
A butterfly valve assembly includes a two-section housing in which a resilient liner is seated. The liner includes diagonally opposed collars, with a bushing being bonded within each collar. A gate is rotatably mounted within the liner and includes closure, stem and stub shaft portions of integral, one-piece construction. The gate is formed of plastic and includes a metallic reinforcing shaft extending completely therethrough. The closure includes bearing surfaces extending around the stem and stub shaft, and sealing surfaces extending between the bearing surfaces. The sealing and bearing surfaces are of continuous uninterrupted spherical configuration. The liner includes seating surfaces which extend between annular surfaces of each collar. The seating surfaces and the annular collar surfaces are of continuous uninterrupted spherical configuration. Flat surface portions are disposed on the bearing surfaces and extend around the stem and stub shaft portions. Flat ends of the bushings bear against these flat surfaces in sealing relationship. The stem includes a tapered section which extends between a pair of constant diameter sections to facilitate insertion of the gate within the liner. The liner includes annular flanges at its outer ends. Each flange includes a region of greatest thickness at its radial innermost portion so that when the valve assembly is installed within a flow line, compression of the flanges is concentrated at such region.
REFERENCES:
patent: 2923524 (1960-02-01), Fawkes
patent: 2986373 (1961-05-01), Masheder
patent: 3024802 (1962-03-01), Stillwagon
patent: 3072139 (1963-01-01), Mosites
patent: 3471121 (1969-10-01), Geiselman
patent: 3563394 (1971-02-01), Smith
patent: 3595523 (1971-07-01), Felton
patent: 3727883 (1973-04-01), Conners et al.
patent: 3737145 (1973-06-01), Heller et al.
patent: 3750698 (1973-08-01), Walchle et al.
patent: 3778028 (1973-12-01), Graves
patent: 4006882 (1977-02-01), Bonafous
patent: 4025050 (1977-05-01), Manki et al.
Celanese Corporation
Cline William R.
Spiegel H. Jay
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