Reflux 819/FO High-Medium Pressure Gas Regulator - Pietro Fiorentini Saudi Arabia H2 Ready
Pilot Operated Regulator

Reflux 819/FO

High Pressure Gas Regulator - Fail Open

A pilot-operated gas pressure regulator classified as Fail Open according to the European Standard EN 334. Recommended for high-pressure transmission and medium-pressure natural gas distribution networks. Hydrogen-compatible for NG-H2 blending applications. Suitable for previously filtered non-corrosive gases.

H2 Ready
Up to 102 bar
Fail Open

Technical Specifications

Performance
Accuracy Class (AC)Up to 2.5
Lock-up Pressure Class (SG)Up to 5
Downstream Pressure Range (Wd)1 to 74 bar
Inlet Pressure Range (bpu)3 to 102 bar
Min. Differential Pressure2 bar (when used alone)
Construction
Design PressureUp to 102 bar
Design Temperature-20°C to +60°C
Nominal Sizes1″, 2″, 3″, 4″, 6″, 8″, 10″, 12″
ConnectionsASME B16.5 (Class 150, 300, 600 RF/RTJ) or ISO 7005 (PN 16)
Fail ModeFail Open (FO) - EN 334

Applications

High Pressure Transmission
Medium Pressure Distribution
NG-H2 Blending
Filtered Non-Corrosive Gases
Gas Networks
Industrial Applications

Key Features

Hydrogen Ready

Hydrogen-compatible for NG-H2 blending applications.

Fail Open Safety

Classified as Fail Open per European Standard EN 334 for enhanced safety.

High Pressure Capability

Handles design pressures up to 102 bar for transmission networks.

Excellent Accuracy

Achieves accuracy class up to 2.5 for precise pressure control.

Wide Size Range

Available in sizes from 1″ to 12″ for various applications.

Optional Configurations

Available with optional silencer, slam shut, and monitor configurations.

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