Trunnion Ball Valve Design Guide: Seats, DBB, Cavity Relief, Torque and Pipeline Selection
Trunnion Ball Valve Design Guide: Seats, DBB, Cavity Relief, Torque and Pipeline Selection A trunnion mounted ball valve is a quarter-turn isolation valve in which the ball is mechanically supported rather than allowed to move freely between the seats. That fixed-ball arrangement changes how pressure loads are carried, how the seats create sealing force, how […]
How DBB and DIB Valves Work: Key Differences Explained
Learn how Double Block and Bleed (DBB) and Double Isolation and Bleed (DIB) valves provide two sealing barriers with a bleed cavity for safer pipeline isolation. DBB valves offer compact, verifiable isolation for standard pipeline and manifold applications, while DIB valves provide independent bidirectional sealing for hazardous, high-pressure, and other critical services.