Reflux 819 is a pilot-operated gas pressure regulator, particularly suitable for high-pressure transmission systems and for medium pressure natural gas distribution networks, and usable with previously filtered non-corrosive gases.
According to the European Standard EN 334, it is classified as Fail Close (pilot series 200/A) or Fail Open (pilot series 210/A) according to the installed pilot (except for the PM819 monitor).
Reflux 819 is Hydrogen Ready for NG-H2 blending.