Trunnion Ball Valve: Structure, Function, and Applications
A trunnion ball valve is a type of industrial valve used to control the flow of liquids or gases through a pipeline. Unlike traditional floating ball valves, the ball in a trunnion ball valve is fixed and supported by trunnions, which help absorb pressure from the pipeline and reduce wear on the valve seat. This design is especially suitable for high-pressure, large-diameter applications and ensures reliable sealing and long-term performance. What is a Trunnion Ball Valve? In a trunnion ball valve, the ball is held in place by both an upper and lower trunnion (shaft-like supports), which restrict the ball’s movement. The valve seats are spring-loaded and move slightly toward the ball to create a tight seal when the valve is closed. This reduces the torque required to operate the valve and helps ensure a more consistent seal even under fluctuating pressure or temperature conditions. Key Features of Trunnion Ball Valves Fixed Ball Support: The ball is mounted on trunnions, which elim...