Pietro Fiorentini Norval Regulator

The Pietro Fiorentini Norval Regulator is a spring-loaded, self-actuated gas pressure regulator designed for downstream pressure control in medium- and low-pressure applications. Its balanced valve design delivers fast, accurate response to sudden changes in flow or pressure, making it ideal for ON-OFF burners and variable-flow industrial processes.

Thanks to its top-entry construction, the Norval regulator allows full maintenance without removing it from the pipeline. It’s widely used in commercial and industrial settings, as well as natural gas gate stations.

Key Benefits

• Fast response to dynamic flow changes

• Maintains accuracy under fluctuating inlet pressure

• Top-entry design enables easy in-line maintenance

• Compatible with slam-shut and monitor accessories

• Ideal for gate stations and industrial gas systems
   

Features

• Downstream pressure regulator with fail-open default

• High-accuracy control, even during upstream pressure swings

• Available in sizes from 1" to 8" with flanged connections

• Modular design with optional accessories (e.g., slam-shut, monitor)

• Suitable for natural gas and other filtered non-corrosive gases
   

Benefits

• Reduces downtime and maintenance costs

• Prevents gas service interruptions in critical systems

• Enhances operational safety and system integrity

• Supports flexible installation configurations

• Built to last in industrial environments with minimal upkeep
   

Capability

• Operating pressures: Inlet up to 284 PSIG (1"–3"), 116 PSIG (4"–8")

• Outlet pressure range: 4.0" W.C. to 63.81 PSIG

• Temperature range: -40°F to +140°F (ambient), -4°F to +140°F (flowing gas)

• Accuracy class: AC up to 5; Lock-up class: SG up to 10

• Flow capacities available upon request or via detailed sizing tables
   

Construction

• Body: Cast steel or ductile iron

• Seat: Stainless steel

• Sealing ring: Nitrile rubber

• Diaphragm: Rubberized canvas

• Cover: Carbon steel or aluminum

• Connection fittings: Zinc-plated or stainless steel