Trunnion Mounted Ball Valve

A trunnion ball valve is a form of quarter-turn valve which uses a hollow, perforated and fixed/supported ball to control flow through it. The ball rotates without moving on the horizontal axis, where as seats are floating. A trunnion mounted valve means that the ball is constrained by bearing and only allowed to rotate. Advantages of trunnion ball design are the lower operating torque, ease of operation, minimized seat wear. Superior sealing performance at both high and low pressure.