ASX 176/FO


ASX 176/FO is one of the pilot-operated pressure regulators by Pietro Fiorentini that are suitable for use with previously filtered and non-aggressive gaseous fluids.

Its use is strongly recommended in high-pressure transmission systems and in medium pressure natural gas distribution networks.

According to the European Standard EN 334, it is classified as Fail Open.


  • Accuracy class: up to 2.5
  • Available size DN: 1″, 2″, 3″, 4″, 6″
  • Closing pressure class SG: up to 10
  • Design pressure: up to 102 bar
  • Design temperature: from -20 °C to +60 °C
  • Flanging: class 300, 600 RF or RTJ according to ASME B16.5
  • Minimum working differential pressure: 1.9 bar
  • Outlet pressure range of Wd: from 1 to 74 bar, depending on the installed pilot
  • Range of inlet pressure bpu: from 3 to 100 bar


The configuration options can be compounded and aggregated differently. Please refer to the technical manual for all available combinations.


Technical Manual

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Technical brochure

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