The prior art to which the invention is directed includes the art of butterfly valves being of a type in which a usually circular vane or disk is rotatable in the valve passage between an open and clo

The present invention relates to a butterfly valve in which a disk-like valve member rotates about a valve stem acting as a shaft.

A valve housing having a cylindrical fluid passage therethrough; a disc shaped valve body having a hard annular rim of elliptical cross-sectional shape thereon extending in the plane of the valve body

A butterfly valve including a housing having a hollow passage defining a flow path and a shaft mounted to the housing and extending transversely across the flow path. The shaft defines an axis of rota

An annular inflatable sealing member located in said housing, said annular inflatable sealing member made from an elastomer material, said annular inflatable sealing member having elastomer legs that

The present invention relates to valves of the type having a pivoted throttle plate or butterfly member and particularly valves of this type which are employed for valving flow from a single inlet to

This invention relates to a butterfly valve and a method for making same.

An improved butterfly valve for intercepting a conduit where substances flow, especially suitable for the pharmaceutical, alimentary and chemical fields The valve comprises an annular body integral wi