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The NABIC 500F is ideal 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: DN20 - DN65
Pressure: 0.4 - 12.5 bar
Material: Gunmetal
Temperature: -20 to 195°C
Connection: Flanged inlet & screwed outlet
Pipe Connections
Flanged inlet connections size DN20 upwards. Threaded outlet connections, Rp 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 (Not shown) | 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 |
Dimensional Drawing
Dimensions & Weights
|
SIZE DN |
Inlet |
Rp BSP Outlet |
A (mm) |
B (mm) |
C (mm) |
Weight (Kg) |
|---|---|---|---|---|---|---|
| 20 | Flanged | 1" | 39 | 52 | 162 | 1.70 |
| 25 | Flanged | 1 1/4" | 45 | 60 | 185 | 2.45 |
| 32 | Flanged | 1 1/2" | 54 | 64 | 231 | 3.87 |
| 40 | Flanged | 2" | 64 | 73 | 273 | 4.60 |
| 50 | Flanged | 2 1/2" | 76 | 83 | 303 | 10.10 |
| 65 | Flanged | 3" | 90 | 96 | 366 | 15.00 |