Trunnion Mounted Ball Valve

A trunnion mounted ball valve is a heavy-duty quarter-turn valve where the ball is mechanically anchored at both ends by the stem and a lower trunnion shaft, preventing it from shifting downstream under line pressure. Unlike floating designs, this fixed-ball configuration utilizes spring-loaded seats to achieve a reliable, dual-sided seal under both low-pressure and high-pressure conditions. Fully compliant with strict API 6D and API 608 standards, these valves are critical for large-diameter, high-pressure oil and gas pipeline networks. On this online platform, you can choose from various qualified China ball valve manufacturers. Trunnion ball valves across our partner factories are made with strict dimensional accuracy and optimal weight distribution, delivering robust durability and lower operational costs for major global infrastructure projects.