ASX 176/FO fail open pilot operated high pressure gas regulator with pilot tubing, flanged, by Pietro Fiorentini
Pilot Operated Regulator

ASX 176/FO High Pressure Gas Regulator - Fail Open

A pilot-operated pressure regulator designed for filtered and non-aggressive gaseous fluids in high-pressure transmission and medium-pressure distribution networks. Classified as Fail Open according to European Standard EN 334, providing enhanced safety for critical applications.

Supplied and supported across Saudi Arabia, the GCC and the Middle East from Al Khobar

Up to 102 bar
Fail Open
AC up to 2.5

Technical Specifications

Performance
Accuracy Class (AC)Up to 2.5
Lock-up Pressure Class (SG)Up to 10
Downstream Pressure Range (Wd)1 to 74 bar
Inlet Pressure Range (bpu)3 to 100 bar
Min. Differential Pressure2 bar
Construction
Design PressureUp to 102 bar
Design Temperature-20°C to +60°C
Nominal Sizes1″, 2″, 3″, 4″, 6″
ConnectionsClass 300, 600 RF or RTJ per ASME B16.5
Fail ModeFail Open (EN 334)

Applications

High Pressure Transmission
Medium Pressure Distribution
Filtered Non-Corrosive Gases
Gas Networks
Industrial Applications
Critical Infrastructure

Key Features

Fail Open Safety

Classified as Fail Open per EN 334 for enhanced safety in critical applications.

High Pressure Capability

Handles design pressures up to 102 bar for transmission applications.

Excellent Accuracy

Achieves accuracy class up to 2.5 for precise pressure control.

Pilot Operated Design

Advanced pilot-operated control for stable regulation and excellent pressure control stability.

Filtered Gas Compatible

Suitable for previously filtered non-aggressive gaseous fluids.

Optional Configurations

Available with optional silencer, monitor and slam shut configurations for enhanced functionality.

Frequently asked questions

How does the ASX 176/FO differ from the ASX 176?

The ASX 176/FO is the fail open version; its flyer calls it a true fail open plug and seat regulator. It covers 3 to 100 bar inlet and 1 to 74 bar outlet, needs a 2 bar minimum differential, and reaches accuracy up to AC 2.5 and lock-up up to SG 10. The fail close ASX 176 reaches AC 1 and works from 0.5 bar differential. Sizes and flanges are the same.

Which accessories are available for the ASX 176/FO?

The flyer lists the LDB/176 silencer, the PM/176 monitor and the SSX 176 slam shut valve. The body is ASTM A350 LF2 steel, with Class 300 or 600 RF or RTJ flanges per ASME B16.5, in 1 to 6 inch. It is designed to EN 334 for previously filtered, non-corrosive gases.

Who supplies the ASX 176/FO in Saudi Arabia, the UAE and the wider GCC?

Pietro Fiorentini Saudi Industry in Al Khobar supplies and supports the ASX 176/FO for projects in Saudi Arabia, the UAE, Qatar, Kuwait, Bahrain and Oman. Tell us your inlet and outlet pressures and the required fail mode, and we will prepare a quotation.

Need More Information?

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