Normalized Centrifugal PumpFBCN 250-500
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
1,600 m³/h
Head
50–130 m w.c.
Absorbed power
230–650 HP
NPSH required
5–11 m
Maximum efficiency
85%
Performance Curves
Q × H hydraulic envelope of the FBCN 250-500 pump at 1750 rpm, per the official FB Bombas technical catalog (curve CC-0209.09), with ISO 9906 hydraulic guarantees. Reference plot for pre-sizing — confirm the operating point with FB Bombas engineering.
- Flow range
- 0.0 – 1,600.0 m³/h
- Head range
- 50.0 – 130.0 m
- Impellers
- 6 × Ø 504–400 mm
- Speed
- 1750 rpm · CC-0209.09
Hydraulic envelope — all impellers
Overlaid H × Q curves. Each color represents one impeller diameter.
- Ø 504 mm
- Ø 480 mm
- Ø 460 mm
- Ø 440 mm
- Ø 420 mm
- Ø 400 mm
Impeller Ø 504 mm
| Flow · m³/h | 0.0 | 400.0 | 800.0 | 1,200.0 | 1,600.0 |
|---|---|---|---|---|---|
| Head H · m | 130.0 | 125.0 | 116.0 | 104.0 | 90.0 |
Impeller Ø 480 mm
| Flow · m³/h | 0.0 | 400.0 | 800.0 | 1,150.0 | 1,480.0 |
|---|---|---|---|---|---|
| Head H · m | 116.0 | 111.0 | 102.0 | 92.0 | 82.0 |
Impeller Ø 460 mm
| Flow · m³/h | 0.0 | 400.0 | 750.0 | 1,100.0 | 1,400.0 |
|---|---|---|---|---|---|
| Head H · m | 106.0 | 101.0 | 93.0 | 83.0 | 73.0 |
Impeller Ø 440 mm
| Flow · m³/h | 0.0 | 400.0 | 750.0 | 1,050.0 | 1,300.0 |
|---|---|---|---|---|---|
| Head H · m | 93.0 | 89.0 | 81.0 | 72.0 | 63.0 |
Impeller Ø 420 mm
| Flow · m³/h | 0.0 | 400.0 | 700.0 | 1,000.0 | 1,250.0 |
|---|---|---|---|---|---|
| Head H · m | 85.0 | 81.0 | 73.0 | 64.0 | 55.0 |
Impeller Ø 400 mm
| Flow · m³/h | 0.0 | 400.0 | 700.0 | 1,000.0 | 1,280.0 |
|---|---|---|---|---|---|
| Head H · m | 76.0 | 72.0 | 65.0 | 57.0 | 50.0 |
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 | 504 mm | 43 mm |
| 2 | 480 mm | 43 mm |
| 3 | 460 mm | 43 mm |
| 4 | 440 mm | 43 mm |
| 5 | 420 mm | 43 mm |
| 6 | 400 mm | 43 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
Frequently Asked Questions
Technical questions about the FBCN 250-500 centrifugal pump.
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)