VALVE SEAT AND VALVE DISC WITH CASCADED GEOMETRIES

摘要

Disclosed are a valve seat apparatus and valve disc apparatus. The valve seat (100) can include a substantially hollow seat interior (150). The substantially hollow seat interior (150) can also define a substantially frusto-conical seat cavity (152) with a radial axis (R). The substantially hollow seat interior (150) can have first and second wall sections (102,106), with the second wall section (106) being aligned at a smaller angle relative to the radial axis than the first wall section (102). The valve disc (200) can include a substantially frusto-conical valve body (250) with a radial axis (R). The valve body (250) can include first and second disc surfaces (202,206) each aligned at an angle relative to the radial axis. The second disc surface (206) can have an angle relative to the radial axis that is smaller than that of the first disc surface (202).