Flexible seals for process control valves

摘要

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.

主权项

1. A seal for use in a butterfly valve, the seal comprising:
a flexible carrier to surround a flow control aperture; a cartridge having an outer circumferential surface coupled to an inner diameter surface of the flexible carrier, the cartridge including a first portion and a second portion coupled to the first portion, the first and second portions defining an opening; and a seal ring disposed within the opening of the cartridge to form a seal between the flexible carrier and a flow control member disposed within the flow control aperture the seal ring being indirectly coupled to the flexible carrier by the cartridge, the seal ring having a first layer of a first material and a second layer of a second material.