Flanged angle type pressure relief valve (Fire pump relief valve) is used in the discharge of fire pump with flanged connection. It automatically relieves excessive pressure, so to maintain constant pressure. It allows the fire pump to be stopped without causing surging.
Available size (Source 1 with UL/FM)
| Size | Relief pressure range (psi) | Connection | Working pressure (psi) | Ref.No. |
|---|---|---|---|---|
| 2″ / DN50 | 20 ~ 200 / 100 ~ 300 | Class 150 / 300 | 250 / 400 | U1302 (ISO) |
| 2-1/2″ / DN65 | 20 ~ 200 / 100 ~ 300 | Class 150 / 300 | 250 / 400 | U1303 (ISO) |
| 3″ / DN80 | 20 ~ 200 / 100 ~ 300 | Class 150 / 300 | 250 / 400 | U1304 (UL/FM) |
| 4″ / DN100 | 20 ~ 200 / 100 ~ 300 | Class 150 / 300 | 250 / 400 | U1305 (UL/FM) |
| 6″ / DN150 | 20 ~ 200 / 100 ~ 300 | Class 150 / 300 | 250 / 400 | U1307 (UL/FM) |
| 8″ / DN200 | 20 ~ 200 / 100 ~ 300 | Class 150 / 300 | 250 / 400 | U1308 (UL/FM) |
| 10″ / DN250 | 20 ~ 200 / 100 ~ 300 | Class 150 / 300 | 250 / 400 | U1309 (ISO) |
Note:
1. For size 3″, 4″, 6″, and 8″, the working pressure of Class 300 connection is 300 psi by UL listed, and 400 psi by FM approved.
2. EN/BS flanged end connection is also available by FM approved, including EN 1092-2 PN10, PN16, or PN25.
3. KOL Anti-Cavitation Trim Seat is available.
4. As factory preset, the relief pressure is set at 60 psi for 20 ~ 200 range, 100 psi for 100 ~ 300 range.
Available size (Source 2 with UL/FM)
| Size | Relief pressure range (psi) | Connection | Working pressure (psi) | Ref.No. |
|---|---|---|---|---|
| 3″ / DN80 | 65 ~ 300 | Class 125 / 150 / 250 / PN16 | 300 | U1324 (UL/FM) |
| 4″ / DN100 | 65 ~ 300 | Class 125 / 150 / 250 / PN16 | 300 | U1325 (UL/FM) |
| 5″ / DN125 | 65 ~ 300 | Class 125 / 150 / 250 / PN16 | 300 | U1326 (UL/FM) |
| 6″ / DN150 | 65 ~ 300 | Class 125 / 150 / 250 / PN16 | 300 | U1327 (UL/FM) |
| 8″ / DN200 | 65 ~ 300 | Class 125 / 150 / 250 / PN16 | 300 | U1328 (UL/FM) |
Note: As factory preset, the relief pressure is set at 130 psi for 65 ~ 300 range.
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