FLEXIBLE SEAL FOR PROCESS CONTROL VALVE

摘要

PROBLEM TO BE SOLVED: To provide a seal structure that has less wear and is more simply maintained in a butterfly valve.SOLUTION: A seal includes a substantially flexible ring-shaped carrier 408 configured to be fixed within a butterfly valve and to surround a flow control aperture therein. Moreover, the seal includes a ring-shaped cartridge connected to an inner diameter of the ring-shaped carrier. The cartridge includes a first portion 404 and a second portion 406 connected to the first portion to define a circumferential aperture to hold a seal ring 412.