Images are representations only.

Reflux 819/FO Pressure Regulator

Brand: Pietro Fiorentini S.p.A.
Request Information

When requesting information, please download the Fillable PDF to provide details about your regulator use case. Instructions for completing the form are found in the footer of the document. Once completed, please upload the document with the Request for Information.

Hydrogen Compatible Hydrogen Compatible
Reflux 819/FO is a downstream pilot-controlled pressure regulator for medium and high pressure applications. It is particulary suitable for use within the framework of installation for the distribution of natural gas, as well as for supplying network for civil and industrial use.

The Reflux 819/FO regulator is classified according to the European standard EEN 334 as a regulator which reacts in opening (Fail to open).
Features
  • Maximum inlet pressure: Up to 102 bar
  • Downstream pressure regulation range: from 1 bar to 74 bar depending on the pilot installed
  • Minimum differential pressure: 1.9 bar
  • Minimum ambient temperature: Execution up to -40° C,
  • Maximum ambient temperature: +60° C
  • Inlet Gas Temperature: Up to -20° to 60° C
  • AC accuracy class: Up to 2.5
  • SG lock up over pressure: Up to 10
Reflux 819/FO is a downstream pilot-controlled pressure regulator for medium and high pressure applications. It is particulary suitable for use within the framework of installation for the distribution of natural gas, as well as for supplying network for civil and industrial use.

The Reflux 819/FO regulator is classified according to the European standard EEN 334 as a regulator which reacts in opening (Fail to open).
Features
  • Maximum inlet pressure: Up to 102 bar
  • Downstream pressure regulation range: from 1 bar to 74 bar depending on the pilot installed
  • Minimum differential pressure: 1.9 bar
  • Minimum ambient temperature: Execution up to -40° C,
  • Maximum ambient temperature: +60° C
  • Inlet Gas Temperature: Up to -20° to 60° C
  • AC accuracy class: Up to 2.5
  • SG lock up over pressure: Up to 10
Close

Specifications

Brand

Hydrogen Compatibility %

Hydrogen Compatible up to 100% Hydrogen Compatible up to 100% Hydrogen Compatible up to 30% Hydrogen Compatible up to 30% Hydrogen Compatible up to 20% Hydrogen Compatible up to 20%

Accuracy Class

  • Up to 1 %

Available Size DN

  • 1”
  • 2”
  • 3”
  • 4”
  • 6”
  • 8”
  • 10”

Closing Pressure Class SG

  • 5 % to 1 % Depending on Outlet Pressure

Design Temperature

  • -10° to 60° C

Flanging

  • Class 150-300-600 RF or RTJ According to ANSI B16.5 and PN 16 According to ISO 7005

Maximum Working Differential Pressure

  • 99 bar

Minimum Working Differential Pressure

  • 2 bar when used Alone
  • 0.5 bar when used in Combination with a Reflux 819 FC Monitor

Outlet Pressure Range of Wd

  • 1 to 74 bar

Range of Inlet Pressure Bpu

  • 3 to 102 bar
Close