F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
F16K 3/22 (2006.01) F16K 5/06 (2006.01)
Patent
CA 2084381
IMPROVED FLEXIBLE SEATING STRUCTURE FOR ROTARY VALVES 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 against the other of the valve body and valve closure member by pressurized fluid forces during closure. A resilient seal member is positioned between the flexible seating ring and that one of the valve body and valve closure member to which it is attached. Slotted fastener holes spaced radially along the flexible seat and corresponding fasteners permit automatic axial 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.
Borden Ladner Gervais Llp
Henry Pratt Company
Kurkjian Gregory A. Jr.
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