Fisher Controls International LLC

Andrew John Olsen

Wade Jonathon Helfer

David John Koester

Paul Russel Dalluge

Benjamin Uriah Good

Flexible seals for process control valves are disclosed. An example disclosed seal includes a seal for use with a butterfly valve. The example seal includes a substantially flexible ring-shaped carrier configured to be moveably fixed within the butterfly valve and to surround a flow control aperture therein. The example seal includes a seal stiffener adjacent the substantially flexible ring-shaped carrier to increase the stiffness of the substantially flexible ring-shaped carrier in a first flow direction. The example seal includes a substantially rigid seal ring to engage an opposing surface.

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Brookings, SD, United States of America

Andrew John Olsen