Extended hub valve closure member

Valves and valve actuation – Rotary valves – Butterfly

Patent

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Details

251306, 251368, F16K 122

Patent

active

044912994

ABSTRACT:
A valve closure member with a hub which extends beyond the radius of the circumferential sealing region of the closure member to a point greater than the extended edge of the lip of the valve seat recess in the valve body. The extended hub is spaced from the circumferential sealing region by a recess to receive a portion of the lip when the closure member is rotated.

REFERENCES:
patent: 2729238 (1956-01-01), Hite
patent: 3081791 (1963-03-01), Wheatley
patent: 3343805 (1967-09-01), Felton
patent: 3567180 (1971-03-01), Williams
patent: 3589678 (1971-06-01), Magoon
patent: 4022424 (1977-05-01), Davis et al.
patent: 4162782 (1979-07-01), Wilkins
patent: 4176820 (1979-12-01), Broadway
patent: 4235418 (1980-11-01), Natalizia
patent: 4254937 (1981-03-01), Hubertson
patent: 4373542 (1983-02-01), Scaramucci
patent: 4394003 (1983-07-01), Whitaker

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