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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Features
- 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.
Specifications
| 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 | |
