The governors with and without filter with double safety diaphragm in the Pietro Fiorentini range are equipped with a balanced device. They represent the ideal solution for supplying burners.

They can be used with previously filtered non-corrosive gases and are widely used in the construction of low pressure natural gas distribution networks to industrial, commercial and residential users.

These devices comply with standard EN 88-1 and are Hydrogen Ready for NG-H2 blending.


  • Accuracy class AC: 15
  • Nominal sizes DN: 1/2″, 3/4″, 1″, 1″ 1/4, 1″ 1/2, 2″
  • Lock-up pressure class SG: 30% (min 3”wc | 0.75 KPa)
  • Design pressure: 14.5 psig | 100 KPa
  • Design temperature: from -5 °F to +140 °F | -15 °C to +60 °C
  • Connections: according to UNI EN ISO 228-1:2003; according to NF E29-533:2014 and NF E29-536:2017
  • Minimum differential pressure: 1″wc | 0,25 KPa
  • Range of downstream pressure Wd: from 2″wc to 4.3 psig | 0.5 KPa to 30 KPa
  • Inlet pressure range bpu: from 1″wc to 7.5 psig | 0.2 KPa to 50 KPa


Technical Manual

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Hydrogen compatibility declaration

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