• The 598 FO Series pressure relief valves or backpressure regulators are designed to work successfully in a wide variety gas applications.
  • Pilot-Operated Regulators.
  • Easy Top Entry In-line Maintenance
  • Body Sizes: 1” or 2”
  • End Connections and Pressure Ratings: Flanges = ANSI 300# RF 51.0 barg (740 psig), ANSI 150# RF 20.3 barg (294 psig). Thread = Female NPT 51.0 barg (740 psig) or 20.3 barg (294 psig)