Trunnion ball valves


The ball of the floating valve is mounted on a trunnion which supports the pressure load. The seats are spring energized and the body construction is one piece, made by forging or casting. The ball is inserted from the top and it’s possible to disassembly the valve in line.

Mainly used for high-pressure transmission systems and for medium pressure gas distribution networks, it can be used with natural gas and previously filtered non-corrosive gases.

The trunnion ball valves are Hydrogen Ready for NG-H2 blending.

For the Pietro Fiorentini Group, valves are produced by TIV Valves, a Group company specialized in the production of valves based in Rescaldina (MI). For more information visit the website.


  • Design pressure: ANSI up to 420 bar, API up to 690 bar (10000 psi)
  • Design temperature: from -196 °C to +450 °C
  • Pressure class: ANSI from 150 to 2500, API from 2000 to 10000
  • Nominal sizes DN: ANSI up to 60, API up to 11
  • Flanges: RF/RTJ according to ASME B16.5 and B16.47, BW according to ASME B16.25, 6B/6BX according to API 6A
  • End to end dimensions: according to API 6D/6A
  • Options: emergency sealant injection, metal seated
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