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The NABIC Fig 520 flanged valve has been designed primarily for use on unvented hot water Heating systems, where a high capacity, emergency steam relief capability is required.
All wetted parts are manufactured from dezincification resistance materials. Designed and tested to BS EN ISO 4126 -1. Approved for use on applications requiring WRAS.
Medium: Hot water, steam, compressed air and inert gasses, Co2 (to 20°C), ethylene glycol, potable water
Size Range: DN65 - DN100
Pressure: 0.4 - 12.5 bar
Material: Gunmetal
Temperature: -20 to 195°C
Connection: Flanged inlet & screwed outlet
Pipe Connections
Flanged inlet connections. Threaded female outlet connections, Rp (BSP) parallel to BS EN 10226-1. Most flange standards can be accommodated.
Testing
All valves are shell and seat tested (to confirm set pressure) before leaving the factory and all valves are supplied pre-set with a tamper proof seal. Pressure Test Certificate and Letters of Conformity available on request.
Product Extras
Materials
| Ref No | Name of Part | Material |
|---|---|---|
| 1 | Thrust Washer | Brass, BS EN 12164 CW609N |
| 2 | Grubscrew | Steel |
| 3 | Test Lever | Brass, BS EN 1982 CC754S |
| 4 | Spring | Chrome Vandium Alloy Steel, BS 2803 735 A50 HS (Stainless Steel, BS 2056 302S26 Opt) |
| 5 | Label | Yellow kapton |
| 6 | Spring Cover | Bronze, BS EN 1982 CC491K |
| 7 | Piston | Brass, BS EN 12164 CW609N |
| 8 | Diaphragm | Silicon Rubber |
| 9 | Seat Seal Holder | Bronze, BS EN 1982 CC491K / Brass BS EN 12164 CW602N (DZR) |
| 10 | Seat Seal | PTFE (Viton Opt) |
| 11 | Starlock Washer | Stainless Steel |
| 12 | Body | Bronze, BS EN 1982 CC491K |
| 13 | Lever Pin | Steel |
| 14 | Lead Seal | Lead |
| 15 | Adjusting Screw | Brass, BS EN 12164 CW609N |
| 16 | Spring Plate | Brass, BS EN 12164 CW609N |
| 17 | Spindle | Brass, BS EN 12164 CW721R |
| 18 | Seat Seal Retaining Plate | Bronze, BS EN 1982 CC491K / Brass BS EN 12164 CW602N (DZR) |
| 19 | O-Ring | Viton |
| 20 | Seat | Bronze, BS EN 1982 CC491K |
| 21 | Seat O-ring | Viton |
| 22 | Drain Plug | Brass, BS EN 12164 CW609N |
Dimensional Drawings
Dimensions & Weights
|
SIZE DN |
Inlet |
Ro BSP Outlet |
ØA |
B (mm) |
C (mm) |
D (mm) |
E (mm) |
RD |
|---|---|---|---|---|---|---|---|---|
| 65 | Flange | 2" | 40 | 350 | 152 | 175 | 64 | 1/4" |
| 80 | Flange | 2 1/2" | 50 | 390 | 166 | 195 | 76 | 1/4" |
| 100 | Flange | 3" | 65 | 480 | 205 | 210 | 90 | 3/8" |