Aperflux 851 High-Medium Pressure Gas Regulator - Pietro Fiorentini Saudi Arabia H2 Ready
Pilot Operated Regulator

Aperflux 851

High-Medium Pressure Gas Regulator

The Aperflux 851 is a pilot-operated gas pressure regulator designed for filtered non-corrosive gases. It serves high-pressure transmission systems and medium-pressure natural gas distribution networks. The device is "Fail Open" per EN 334 and is hydrogen-ready for NG-H2 blending applications.

EN 334 Certified
Up to 102 bar
Hydrogen Ready

Technical Specifications

Detailed technical data for the Aperflux 851

Performance
Accuracy Class (AC) Up to 2.5
Lock-up Pressure Class (SG) Up to 10
Downstream Pressure (Wd) 0.8 to 74 bar
Inlet Pressure (bpu) 1.3 to 85 bar
Min. Differential Pressure 0.5 bar (>2 bar recommended)
Construction
Nominal Sizes 1″, 2″, 3″, 4″, 6″, 8″, 10″
Design Pressure Up to 102 bar
Operating Temperature -20°C to +60°C
Connections ASME B16.5 (Class 150/300/600 RF/RTJ) / ISO 7005 (PN 16/25/40)
Operation Type Pilot Operated

Applications

Gas Transmission HP
Gas Distribution MP
Compressor Stations
City Gates
Gas Networks
Gas Storage
Regasification
Gas Liquefaction
Heavy Industry

Key Features

Hydrogen Ready

Compatible with NG-H2 blending for future energy transition applications.

Wide Size Range

Available in sizes from 1" to 10" for diverse application requirements.

Configuration Options

Available with silencer, slam shut, and monitor configurations.

Global Standards

Connections per ASME B16.5 and ISO 7005 standards.

High Pressure Capability

Design pressure up to 102 bar for demanding applications.

Fail Open Design

EN 334 certified fail-safe operation for critical applications.

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