Abstract: Valve such as a ball valve with a metal seat ring assembly comprising an outer ring seated in the valve body and an inner ring seated in the outer ring. The outer ring is formed with a lip projecting inwardly and presenting a sealing surface for contact with the valve closure member. The inner ring is formed with a lip behind which is an annular groove which permits flexing of such lip. The inner ring is seated within the outer ring. There is a small clearance between the lip and the outer ring which causes sealing between the closure member and the inner ring following by sealing between the closure member and the outer ring. The configuration and clearances of such lips is such that in initial closing the valve closure member contacts the lip of the inner ring causing it to flex and on final closing it contacts the lip of the outer ring causing it to flex.

Abstract: A dual-action ball valve having a sleeve fixedly mounted within the valve bonnet. Spiral slots are provided in the sleeve for receiving a transverse guide pin mounted in the valve stem. The lower end of the valve stem is provided with sloping cam surfaces cooperating with tapered side walls provided in an apertured insert mounted in the top wall of the ball valve through which the stem extends. A pair of upwardly extending arcuate members are formed on the insert and engage the lower end of the valve bonnet bushing to provide a trunnion for the ball valve. The components of the dual-action ball valve provide increased bearing surfaces to facilitate use of the valve in high pressure systems.