Pressure Reducing Valve (Flanged)

NAFFCO pressure reducing oblique landing valves are suitable for installation on wet risers in buildings for fire fighting purposes, permanently charged with water from a pressurised supply.

These landing valves are pressure reducing type designed to provide a range of outlet pressure (4 bar - 7 bar). The Landing valves are classified under high pressure and are suitable for use at nominal inlet pressure up to 20 bar.

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  • BSI Kitemark approved.
  • Body material made of copper alloy to EN 1982.
  • Hand wheel material made of grey cast iron to BS EN 1561.
  • Blank cap material made of copper alloy to EN 1982.
  • Possible to replace the gland seal when under pressure with the valve fully closed.     
  • Disc facing rubber are of replaceable type.
  • Valves are provided with a strap and pad lock so that the hand wheel can be secured to counter unauthorized use.
  • The hand is painted black and the body is painted red.
    Model Number NWR 120 NWR 122
    Valve Type Oblique, Pressure Reducing, Flanged Inlet
    Pressure Rating High Pressure Valve
    Inlet Flange Size DN50 DN65
    Working Pressure 20 bar Maximum
    Test Pressure Valve Seat Test at 22 bar • Body Test at 30 bar
    Flange Drilling BS4504 part 2: 1974 Table: 16/21 BS4504 part 2: 1974 Table: 25/21
    Min. Water Flow Rate 8.5 L/S @ 4.5 bar Outlet Pressure
    Min. Valve Pressure Regulating 4 - 7 bar


    Kitemark Certificate


    Technical Datasheet


    Technical Drawings

    NWR 120

    NWR 122

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