Flexible seating structure for rotary valves
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Dec 3, 1991
Grant Date -
N/A
app pub date -
Dec 12, 1990
filing date -
Dec 12, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A flexible seating apparatus is disclosed for use in rotary valves comprising a flexible seat ring attached to one of the valve body and valve closure member in a cantilevered fashion and maintained thereagainst by a resilient member, the latter being held captive in a pre-formed channel in the flexible seat ring. Slotted fastener holes spaced radially along the flexible seat and corresponding fasteners permit automatic axial ring adjustment and proper positioning of the flexible seat ring upon assembly and initial closure of the valve's closure member. An alternate embodiment is disclosed in which the flexible seat ring is mounted to the other of the valve body and the valve closure member. The present flexible seating apparatus can be used with rotary ball valves and butterfly valves, for example, and further, is advantageously used to permit droptight metal-to-metal valve seating.
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