Norval pressure regulators are direct-acting devices for low and medium pressure applications controlled by a diaphragm and counter spring.

These regulators are suitable for use with pre-filtered, non-corrosive gases.



Design pressure up to 19,6 bar
Design temperature -20°C a +60°C (higher or lower temperatures on request)
Accuracy class up to 5
Closing pressure class SG up to 10
Flanging Class 150 RF according to ANSI B16.5 and PN16 according to ISO 7005
Outlet pressure range of Wd 1" to 4" DN from 8 to 4400 mbar; 6" to 8" DN from 12 to 1800 mbar
Available size DN 1" (25) - 1"1/2 (40) - 2" (50) - 2"1/2 (65) - 3" (80 ) 4" (100) 6" (150) 8" (200)
Range of inlet pressure bpu 0,1 - 19,6 bar for DN from 1" to 3" 0,1- 8 bar for DN >3"

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.

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