Valves and valve actuation – With means to increase head and seat contact pressure – Fluid pressure
Patent
1998-05-11
1999-08-10
Fox, John
Valves and valve actuation
With means to increase head and seat contact pressure
Fluid pressure
251298, 25131701, F16K 506
Patent
active
059346450
ABSTRACT:
A rotary valve is provided including a valve element mounted within the flow path of a valve body and rotatable about a stem axis. A peripheral seating surface on the valve body surrounds the flow path through the valve body and is spaced from the stem axis for sealing engagement with the valve element when rotated to its closed position. The peripheral seating surface on the valve body is preferably annular, and more preferably has an arcuate cross-sectional configuration and includes a central annular seating line spaced closer to the center point of the valve than adjoining upstream and downstream portions of the seating surface. The valve element includes a rigid body with a peripheral resilient overlay. The resilient overlay has a peripheral pressure-responsive sealing member for flexing in response to fluid pressure into sealing engagement with the seating surface. A peripheral backup shoulder is provided on the rigid body of the valve element for preventing extrision of the sealing member under high pressure when the valve element is in engagement with the annular seating surface. The concepts of the present invention are particularly well suited for a plug valve and provide reliable sealing engagement between the plug and the seating surface when a high pressure differential exists across the closed valve.
REFERENCES:
patent: 2844353 (1958-07-01), Gurries
patent: 2852226 (1958-09-01), Wheatley
patent: 2923523 (1960-02-01), Taylor
patent: 3347516 (1967-10-01), Linde
patent: 3404864 (1968-10-01), Reddy
patent: 3501127 (1970-03-01), Freeman
patent: 3990676 (1976-11-01), Brownstein
patent: 4083529 (1978-04-01), Santy et al.
patent: 4154426 (1979-05-01), Santy et al.
patent: 4253641 (1981-03-01), VanRyck
patent: 4410007 (1983-10-01), Karpenko
patent: 4604254 (1986-08-01), Yamamoto et al.
patent: 4635674 (1987-01-01), Baika
1988 Ballcentric Valve brochure of Keystone Valve U.S.A., Inc.
Fox John
Tyco Flow Control, Inc.
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