Mod. FB


Mod. FB is part of the range of Pietro Fiorentini’s two-stage direct-operated gas pressure regulators. It has an integrated slam shut for maximum downstream pressure and the option of slam shut for minimum downstream pressure and anti-reset system.

It is widely used in low pressure natural gas distribution networks for residential users and can be used with previously filtered non-corrosive gases.


  • Accuracy class: 10
  • Connections: 1/2″ in-line inlet, 1″ in-line outlet, 3/4″ right angle outlet
  • Closing pressure class SG: 20
  • Safety accuracy class AG: 10 min 2 mbar
  • Design pressure: 7 bar
  • Design temperature: from -20 °C to +60 °C
  • Minimum differential pressure: 0.15 bar FB6, 0.2 bar FB10, 0.3 bar FB25, 0.6 bar FB50
  • Outlet pressure range:
    • Wds from 13 to 180 mbar
    • Wdso from 35 to 300 mbar
    • Wdsu from 8 to 80 mbar
  • Overflow trip: 110-170% of nominal flow rate
  • Range of inlet pressure range bpu: from 0.15 to 5 bar
Scroll to top
Please turn to portrait for a better experience

Please turn to portrait
for a better experience