Ball valve with readily removable ball and seats for high temperature environment

Abstract From the Canadian patent

A ball valve assembly in which the ball and valve seats are readily removable from the valve housing, the valve being designed for a high temperature environment. The valve seats cooperate with seat supports and the ball each of, two valve seats comprising a single integral annular fluid-tight metallic spring member disposed between each seat support and the ball. Each metallic spring member comprises a cylindrical bellows length of one or more convolutions, with special ends that are finished in the shape of an internal spherical surface the, same as that of the ball and also that of the inner ends of the seat supports. Ready removal of the ball and valve seats is provided through an …