HIGH-TEMPERATURE BIDIRECTIONAL METAL

摘要

APPLICATION FOR LETTERS PATENT FOR HIGH-TEMPERATURE BIDIRECTIONAL METAL SEAL Disclosed herein are valve seals wherein an annular metallic seal member is retained in an annular recess in a valve body wall, the seal member being resiliently deformable in both axial and radial directions. A resilient annular Belleville spring portion is provided linking an inner sealing portion and an outer flange portion which is sealingly engaged by the valve body. When a valve employing this seal arrangement is closed, differential pressure acting from either direction urges a valve closure member and the seal member in a downstream direction, and forces the seal member and the valve closure member into tighter sealing engagement.