Normalized Centrifugal Pump
FBCN 250-300
Large-capacity model for critical industrial installations: refineries, steel mills, chemical plants, municipal water supply and mining. Back pull-out construction per ASME B73.1.
Performance Envelope — 1750 rpm
Maximum flow
1,500 m³/h
Head
5–40 m w.c.
Absorbed power
30–110 HP
NPSH required
7–15 m
Maximum efficiency
82%
Performance Curves
Q × H hydraulic envelope of the FBCN FBCN 250-300 pump at 1750 rpm, extracted from the official FBCN Technical Manual (curve CC-0210.09) and bench-validated at FB Bombas test facility in Cabreúva–SP, Brazil.
- Flow range
- 200.0 – 1,450.0 m³/h
- Head range
- 9.0 – 38.0 m
- Impellers
- 6 × Ø 313–212 mm
- Speed
- 1750 rpm · CC-0210.09
Hydraulic envelope — all impellers
Overlaid H × Q curves. Each color represents one impeller diameter.
- Ø 313 mm
- Ø 295 mm
- Ø 278 mm
- Ø 258 mm
- Ø 233 mm
- Ø 212 mm
Impeller Ø 313 mm
| Flow · m³/h | 200.0 | 600.0 | 1,000.0 | 1,300.0 | 1,450.0 |
|---|---|---|---|---|---|
| Head H · m | 38.0 | 35.0 | 28.0 | 18.0 | 10.0 |
Impeller Ø 295 mm
| Flow · m³/h | 200.0 | 600.0 | 1,000.0 | 1,300.0 |
|---|---|---|---|---|
| Head H · m | 34.0 | 30.0 | 22.0 | 10.0 |
Impeller Ø 278 mm
| Flow · m³/h | 200.0 | 600.0 | 1,000.0 |
|---|---|---|---|
| Head H · m | 30.0 | 26.0 | 17.0 |
Impeller Ø 258 mm
| Flow · m³/h | 200.0 | 600.0 | 1,000.0 |
|---|---|---|---|
| Head H · m | 25.0 | 20.0 | 11.0 |
Impeller Ø 233 mm
| Flow · m³/h | 200.0 | 600.0 |
|---|---|---|
| Head H · m | 20.0 | 14.0 |
Impeller Ø 212 mm
| Flow · m³/h | 200.0 | 600.0 |
|---|---|---|
| Head H · m | 16.0 | 9.0 |
Available impeller diameters
Each pump ships with the impeller diameter calculated by FB engineering for the specific operating point — design flow and head.
| # | Impeller diameter | Impeller useful width |
|---|---|---|
| 1 | 313 mm | 67 mm |
| 2 | 295 mm | 67 mm |
| 3 | 278 mm | 67 mm |
| 4 | 258 mm | 67 mm |
| 5 | 233 mm | 67 mm |
| 6 | 212 mm | 67 mm |
Typical applications
- Cooling systems for chemical plants and refineries
- Industrial water lines in steel mills and mining
- Treated water pumping in water utilities
- Large NFPA-20 fire-fighting systems
- Lubricating oil cooling for turbomachinery
Physical dimensions and detailed curve
FBCN large-capacity models do not have individual physical dimensions published in the standard technical manual. Each project receives dimensional drawing, project-specific performance curve and material selection through direct consultation with FB Bombas engineering.
- Dimensional drawing with base, flanges, shaft and shaft end per ASME B73.1
- Printed performance curve at the project operating point
- Material selection (cast iron / steel / 316 stainless / duplex) by fluid
- API 682 mechanical seal plan (1, 2, 11, 21, 31, 32, 53A, 53B, 53C)
