The two-stage self-driven pressure regulators FB series  are widely used both in civil and  industrial installations using natural gas, LPG or non-corrosive gases. These regulators are designed  to be fitted directly  to the  users' flow meter or assembled on riser shafts for civil uses.

They can be installed in any position provided that they are protected against atmospheric factors. The internal relief valve vent can be run  outside if installed in enclosed spaces  or for underground plant.

Thanks to the concept of double regulation stage, it is possible to achieve a: high accuracy; high operating reliability. Simple to install. These regulators are manufactured to UNI 8827.



Design pressure 8.6 bar
Accuracy class up to 5
Closing pressure class SG up to 10
Outlet pressure range of Wd 13÷180 mbar
Threaded connections see catalog
Range of inlet pressure bpu 0.15÷8.6 bar

News and articles

26 September 2017

A brief presentation of our modern plant in Desenzano del Garda

A brief presentation of our modern plant in Desenzano del Garda, where our gas pressure regulators are designed, manufactured, tested and shipped around the world.

03 August 2017

Technical Newsletter - Reflux 819 12 "

Reflux 819 12” - Our biggest pilot regulator


Pietro Fiorentini inc.

With each installation created by Pietro Florentini, we increase our experience in the use of new technologies and are improving, which allows us to look to the future with confidence.

We constantly improve our quality and competitiveness, taking into account the highest requirements of our customers.

Our company is a leader in the creation of high-tech equipment and services for the transportation and use of natural gas, which allows us to direct our research to solve all kinds of problems.

View product Visit the manufacturer's website