A trunnion mounted ball valve supports the ball on both ends with fixed shafts, top and bottom, which take the load off the seats and let them float against the ball instead of the ball pressing into them. This design keeps operating torque low even at large sizes and high pressures, since the trunnion, not the seat, carries the weight and thrust of the line. Anti-static devices and fire safe seals are typically standard on this design, given its common use in high pressure and critical isolation service.

Common Applications

• High pressure isolation on large diameter lines
• Pipeline block and bleed service
• Critical shutoff in refineries and offshore platforms
• Applications requiring low operating torque at large sizes