H2 Ready
Reflux 819 High-Medium Pressure Gas Regulator
A pilot-operated gas pressure regulator designed for high-pressure transmission systems and medium pressure natural gas distribution networks. Suitable for previously filtered non-corrosive gases and hydrogen-ready for NG-H2 blending applications. Configurable as Fail Close or Fail Open per EN 334.
Supplied and supported across Saudi Arabia, the GCC and the Middle East from Al Khobar
Technical Specifications
Applications
Key Features
Hydrogen Ready
Ready for NG-H2 blending for future energy applications.
Wide Size Range
Available from 1" to 12" for diverse application needs.
Configurable Options
Available with silencer, slam shut, and monitor options.
High Accuracy
Accuracy class up to 1 for precise pressure control.
Downloads
Technical documentation and resources
Frequently asked questions
Is the Reflux 819 fail open or fail close?
Either. Under EN 334 the Reflux 819 is classified fail close or fail open depending on the pilot installed (the PM/819 monitor excepted). It reaches accuracy class AC 1 and lock-up class SG 2.5, takes 0.8 to 100 bar inlet and controls 0.3 to 74 bar outlet. For a true fail open plug and seat design, choose the Reflux 819/FO.
What sizes and accessories does the Reflux 819 offer?
The Reflux 819 runs from 1 to 12 inch with Class 150, 300 or 600 RF or RTJ flanges or PN 16, for city gates, power plants and gas engines. Options are the DB/819 and LDB/171 silencers, the PM/819 monitor and the SB/82 or HB/97 slam shut valves. An Arctic version covers ambient temperatures from -40 to +60 °C.
Can you supply the Reflux 819 for a project in Saudi Arabia or the Gulf?
Yes. Pietro Fiorentini Saudi Industry in Al Khobar supplies and supports the Reflux 819 for transmission and distribution projects in Saudi Arabia, the UAE, Qatar, Kuwait, Bahrain and Oman. Send us your operating conditions and we will prepare a quotation.
H2 Ready
H2 Ready
Terval AP
Pilot operated regulator for high and medium pressure distribution networks.
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