Trunnion Ball Valve Design: Seats, DBB & 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 […]
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 to Tell If a Ball Valve Is Open or Closed: Position Indicator Guide
Learn how to determine whether a ball valve is open or closed by checking handle alignment, stem-slot direction, gear-operator indicators, actuator feedback, and valve documentation. The guide explains common causes of position misjudgment, why handle position alone can be misleading after maintenance or reassembly, and how clear marking, lockable handles, operator training, and reliable position indication improve safe valve operation and isolation.
Floating vs Trunnion Ball Valve: What’s the Difference?
Compare floating and trunnion ball valves by structure, pressure capability, sealing principle, operating torque, size range, applications, cost, and buyer selection requirements.