Valves and valve actuation – With means to increase head and seat contact pressure – Fluid pressure
Patent
1997-02-20
1998-06-16
Fox, John
Valves and valve actuation
With means to increase head and seat contact pressure
Fluid pressure
251298, 25131701, F06K 500
Patent
active
057658153
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 extrusion 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: 4154426 (1979-05-01), Santy et al.
patent: 4253641 (1981-03-01), Van Ryck
patent: 4410007 (1983-10-01), Karpenko
patent: 4604254 (1986-08-01), Yamamoto
1988 Ballcentric Valve brochure of Keystone Valve U.S.A., Inc.
Bushman Browning
Fox John
Keystone International Holdings Corp.
LandOfFree
Rotary valve with pressurized energized seal does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rotary valve with pressurized energized seal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotary valve with pressurized energized seal will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1716908