Normalized Centrifugal Pump
FBCN 300-340
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
2,400 m³/h
Head
5–50 m w.c.
Absorbed power
60–180 HP
NPSH required
13–22 m
Maximum efficiency
84%
Performance Curves
Q × H hydraulic envelope of the FBCN FBCN 300-340 pump at 1750 rpm, extracted from the official FBCN Technical Manual (curve CC-0211.09) and bench-validated at FB Bombas test facility in Cabreúva–SP, Brazil.
- Flow range
- 400.0 – 2,200.0 m³/h
- Head range
- 5.0 – 48.0 m
- Impellers
- 8 × Ø 351–213 mm
- Speed
- 1750 rpm · CC-0211.09
Hydraulic envelope — all impellers
Overlaid H × Q curves. Each color represents one impeller diameter.
- Ø 351 mm
- Ø 343 mm
- Ø 321 mm
- Ø 300 mm
- Ø 289 mm
- Ø 265 mm
- Ø 241 mm
- Ø 213 mm
Impeller Ø 351 mm
| Flow · m³/h | 500.0 | 1,000.0 | 1,500.0 | 2,000.0 | 2,200.0 |
|---|---|---|---|---|---|
| Head H · m | 48.0 | 43.0 | 35.0 | 23.0 | 14.0 |
Impeller Ø 343 mm
| Flow · m³/h | 500.0 | 1,000.0 | 1,500.0 | 2,000.0 |
|---|---|---|---|---|
| Head H · m | 45.0 | 39.0 | 30.0 | 17.0 |
Impeller Ø 321 mm
| Flow · m³/h | 500.0 | 1,000.0 | 1,500.0 | 2,000.0 |
|---|---|---|---|---|
| Head H · m | 39.0 | 32.0 | 22.0 | 8.0 |
Impeller Ø 300 mm
| Flow · m³/h | 500.0 | 1,000.0 | 1,500.0 |
|---|---|---|---|
| Head H · m | 33.0 | 25.0 | 13.0 |
Impeller Ø 289 mm
| Flow · m³/h | 500.0 | 1,000.0 |
|---|---|---|
| Head H · m | 30.0 | 22.0 |
Impeller Ø 265 mm
| Flow · m³/h | 500.0 | 1,000.0 |
|---|---|---|
| Head H · m | 24.0 | 15.0 |
Impeller Ø 241 mm
| Flow · m³/h | 500.0 | 900.0 |
|---|---|---|
| Head H · m | 18.0 | 8.0 |
Impeller Ø 213 mm
| Flow · m³/h | 400.0 | 700.0 |
|---|---|---|
| Head H · m | 13.0 | 5.0 |
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 | 351 mm | 75 mm |
| 2 | 343 mm | 75 mm |
| 3 | 321 mm | 75 mm |
| 4 | 300 mm | 75 mm |
| 5 | 289 mm | 75 mm |
| 6 | 265 mm | 75 mm |
| 7 | 241 mm | 75 mm |
| 8 | 213 mm | 75 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)
