Main applications

  • Biofuels
  • Boiler circulation
  • Boiler feed systems
  • Breweries
  • Chemical industry
  • District heating
  • Energy
  • Food and beverages
  • Industry engineering
  • Marine
  • Nuclear Power Stations
  • Power Stations < 100 MW
  • Power Stations > 100 MW
  • Steam circuits
  • Steel
  • Sugar
  • Turbine Island

Design type

Non-return valves

Technical data

T max 600 °C
DN max 50
PN max 500


Flanged or weld end non-return valve, check disc with closing spring; seats made of wear and corrosion resistant stellite.


In industrial plants, power stations, process engineering and shipbuilding. For water, steam, gas, oil and other non-aggressive fluids. Other fluids on request.

Further technical information about NORI 500 RXLR/RXSR

Overview of technical data

T -10 – 600 (°C)
DN 10 – 50
PN 500
Body design Straight pattern body
Valve disc/plug material Metal-to-metal seat
Threaded-end design Flange design, butt weld end design, Socket weld end
Body material (EN standard) 1.7380, 1.7335, 1.5415
eClass assignment 37010801
Main applications Industry and process engineering, Energy, Shipping / Shipbuilding
Body material Forged steel
Body/bonnet seal element Internally and externally confined seal