PIETRO FIORENTINIregulator FE 25 TR
Pietro Fiorentini FE-25 two-stage direct-operated gas regulator for low pressure natural gas distribution.
Product Details
Pietro Fiorentini FE-25 Two-Stage Gas Pressure Regulator — Technical Specifications
The Pietro Fiorentini FE-25 is a two-stage, direct-operated, spring-loaded lever gas pressure regulator designed specifically for low pressure natural gas distribution networks serving residential and commercial users. Manufactured in Italy, the FE-25 combines reliable performance with built-in safety features for optimal pressure control.
Operating Pressure:
Inlet Pressure Range: 1.45 psig – 125 psig (10 kPa – 0.86 MPa / 0.15 – 7 bar, up to 8.6 bar on request)
Minimum Inlet-Output Differential: 0.3 bar (4.35 psig)
Outlet Pressure Range (Wds):
BP (Low Pressure): 5.2" W.C. – 2.6 psig (1.3 – 18 kPa)
MP (Medium Pressure): 4.35 psig – 5.8 psig (30 – 40 kPa)
Outlet Pressure Range (Wdso, with overpressure shutoff):
BP: 14" W.C. – 3.5 psig (3.5 – 24.1 kPa)
MP: 4.3 psig – 11.6 psig (30 – 80 kPa)
Capacity:
Maximum Flow: Varies with inlet/outlet pressure; capacity tables available in technical manual
Connection Size:
Inlet: G 1/2" (ISO 228/1) or 3/4" NPT
Outlet: G 3/4" or G 1" (ISO 228/1) or 1" NPT
Body & Construction:
Body Material: Aluminum alloy die-cast body
Type: Two-stage direct-operated regulator
Safety Feature: Built-in overpressure shutoff valve (OPSO)
Optional: Overpressure flow valve for additional overpressure and fire protection
Temperature Range:
Standard Version: -20°C to +60°C (-4°F to +140°F)
Extended Temperature: -30°C to +60°C (-22°F to +140°F)
Cold Version: -40°C to +60°C (-40°F to +140°F)
Accuracy & Performance:
Accuracy Class (AC): 10
Shutoff Class (SG): 20 (minimum 3" W.C. / 0.75 kPa)
Safety Accuracy Class (AG): 10
Lockup Pressure: 110% – 170% of setpoint flow
Compatible Gases:
Natural gas, methane, LPG vapor, air, dry CO₂, nitrogen
Biogas/biomethane compatible
Hydrogen-ready (compatible with H₂ blended natural gas)
Compliance:
Designed per EN 334 (Fail-to-close)
Meets ANSI/ASME standards for residential and commercial gas equipment
EPA certified for low emission requirements
Key Features:
Two-stage design provides stable outlet pressure control
Built-in safety shutoff (fail-safe)
Internal vent limiter (bleed hole < 1 SCFH)
Compact and lightweight construction
Easy installation and maintenance
Suitable for indoor and outdoor installation
Horizontal or vertical mounting positions
Applications:
Residential gas meter sets
Commercial gas appliances
Small industrial facilities
District pressure regulation
Boiler rooms and heating systems
Kitchen equipment (restaurants, cafeterias)
FE-6: Small capacity, min ΔP 0.15 bar
FE-10: Medium capacity, min ΔP 0.2 bar
FE-25: Large capacity, min ΔP 0.3 bar (this model)
FE-50: Extra-large capacity
FES: Special version with different spring configurations
