FE 75/100


The FE75 / FE100 is a two-stage gas pressure regulator by Pietro Fiorentini. It is particularly suitable for low pressure natural gas distribution networks for residential and commercial users. It should be used with previously filtered non-corrosive gases including biomethane and natural gas blended with hydrogen.

According to the European Standard EN 334, it is classified as Fail Close because it is always supplied with an overpressure protection device (slam shut valve).

The FE75 / FE100 is Hydrogen Ready for NG-H2 blending.


  • Accuracy class AC: 10
  • Connections: in-line 1”, 1”1/2 NPT according to ANSI B1.20.1, other configurations or connections on request
  • Lock-up pressure class SG: 20, minimum  3” wc |0.75 kPa
  • Design pressure: 125 psig | 0.86 MPa
  • Inlet pressure: from 7.25 psig to 125 psig | 50 KPa to 0.86 MPa
  • Ambient temperature: standard version from -20°F to +150°F | -30°C to +65°C, arctic version from -40°F to +150°F | -40°C to +65°C
  • Range of downstream pressure:
    • Wds from 5” w.c. to 2.3 psig | 1.3 kPa to 16 kPa for BP, from 2 psig to 5.1 psig | 14 KPa to 35 kPa for MP
    • Wdso from 12.6” w.c. to 3.35 psig | 3.2 kPa to 23.1 kPa for BP, from 3 psig to 8 psig | 21 kPa to 55.2 kPa for MP
    • Wdsu from 2.4″ w.c. to 3.6 psig | from 0.6 kPa to 25 kPa from BP



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Technical Manual

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