Reflux 919 Control Diaphragm Valve
The Reflux 919 is a control diaphragm valve engineered for natural gas and other pre-filtered, non-corrosive gases in high-pressure transmission and medium-pressure distribution networks. With a high turn-down ratio, it provides precise flow control across a wide range of operating conditions. Available in both direct-action (air-to-close) and reverse-action (air-to-open) configurations, the valve is biomethane compatible and available with specific versions for full hydrogen or NG-H2 blending.
Supplied and supported across Saudi Arabia, the GCC and the Middle East from Al Khobar
Technical Specifications
Detailed technical data for the Reflux 919 Control Valve
Applications
Key Features
High Turn-Down Ratio
High turn-down ratio provides precise control across a wide range of flow conditions.
Hydrogen Versions
Biomethane compatible and available with specific versions for full hydrogen or NG-H2 blending.
Dual Operating Modes
Available in direct-action (air-to-close) and reverse-action (air-to-open) configurations.
High-Pressure Rating
Designed for pressures up to 100 bar for demanding transmission applications.
Standards Compliant
Designed according to the European standard EN 334.
Versatile Connections
Multiple ANSI and ISO flange options for global compatibility.
Downloads
Technical documentation and resources
Frequently asked questions
What is the Reflux 919 control valve?
The Reflux 919 is a pneumatic control diaphragm valve for natural gas and other filtered non-corrosive gases in high pressure transmission and medium pressure distribution. It is supplied as direct action (air to close) or reverse action (air to open), with fail open or fail close response to EN 334. Inlet pressure runs from 1 to 100 barg, in sizes from 1 to 10 inch.
How is the Reflux 919 controlled, and what accessories are available?
With a pneumatic positioner it takes a 0.21 to 1.03 bar or 0.42 to 2.06 bar control signal; with an electro-pneumatic positioner, 4-20 mA. In pressure control mode it holds a downstream pressure from 0.5 to 95 barg. Accessories include the DB/819 silencer, PM/819 monitor and SB/82 or HB/97 slam shut valves.
Do you supply the Reflux 919 in Saudi Arabia and the GCC?
Pietro Fiorentini Saudi Industry in Al Khobar supplies and supports the Reflux 919 for gas stations and industrial plants in Saudi Arabia, the UAE, Qatar, Kuwait, Bahrain and Oman. Contact us with your flow, pressures and control signal for a quotation.
Need More Information?
Our technical team is ready to help you select the right control valve for your application.