Abstract: An ball valve having a body with an open valve chamber therein, passages into the valve chamber, an opening through the top of the body, a boss having an internal recess opposite and aligned with said opening, a closure releasably secured to said body and closing valve chamber, a ball positioned within said chamber and having a passage therethrough, an upper shaft extending through said opening and a lower shaft positioned in said boss recess, rotation of said upper shaft rotating said ball to control flow through said valve, and a sealing assembly positioned to seal against said ball and having resilient seals and metal seal rings for sealing against pressure independent of the direction of flow or pressure even after the valve has been exposed to sufficient heat to destroy the resilient seals of the sealing assembly.