Trias/M is one of the direct-operated gas pressure regulators controlled by a diaphragm and contrasting regulated spring action by Pietro Fiorentini.

Mainly used for medium and low pressure natural gas distribution networks, it ca be used with previously filtered non-corrosive gases.

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


  • Accuracy class: up to 5
  • Available size DN: 1″ 1/2, 2″
  • Closing pressure class SG: up to 10
  • Design pressure: up to 19.2 bar
  • Design temperature: from -20 °C to +60 °C
  • Flanging: class 150 RF according to ASME B16.5 and PN 16 according to ISO 7005
  • Minimum working differential pressure:
  • Outlet pressure range of Wd: from 15 to 4000 mbar
  • Range of inlet pressure bpu: from 0.2 to 8 bar


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



Click to download the file

Technical brochure

Click to download the file
Scroll to top
Please turn to portrait for a better experience

Please turn to portrait
for a better experience