Grundfos NB 250-400/281 AAF1AESBQQETW3
Product ID: 98975485
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Grundfos NB 250-400/281 AAF1AESBQQETW3
Grundfos NB 250-400/281 AAF1AESBQQETW3
| Controls: | |
| Frequency converter: | None |
| Pressure sensor: | N |
| Liquid: | |
| Pumped liquid: | Water |
| Liquid temperature range: | -25 .. 120 °C |
| Selected liquid temperature: | 20 °C |
| Density: | 998.2 kg/m³ |
| Technical: | |
| Pump speed on which pump data are based: | 1478 rpm |
| Rated flow: | 612.6 m³/h |
| Rated head: | 17.98 m |
| Actual impeller diameter: | 281 mm |
| Nominal impeller diameter: | 400 |
| Shaft seal arrangement: | Single |
| Primary shaft seal: | BQQE |
| Code for shaft seal: | BQQE |
| Curve tolerance: | ISO9906:2012 3B |
| Bearing design: | Standard |
| Materials: | |
| Pump housing: | Cast iron |
| EN-GJL-250 | |
| ASTM class 35 | |
| Wear ring: | Brass |
| CuZn34Mn3AI2Fe1-C | |
| Impeller: | Cast iron |
| EN-GJL-200 | |
| ASTM class 30 | |
| Internal pump house coating: | CED |
| Shaft: | Stainless steel |
| EN 1.4301 | |
| AISI 304 | |
| Installation: | |
| Maximum ambient temperature: | 55 °C |
| Maximum operating pressure: | 10 bar |
| Pipe connection standard: | EN 1092-2 |
| Size of inlet connection: | DN 300 |
| Size of outlet connection: | DN 250 |
| Pressure rating for connection: | PN 10 |
| Bearing lubrication: | Grease |
| Pump housing with feet (Yes/No): | Yes |
| Support block (Yes/No): | N |
| Electrical data: | |
| Motor type: | INNOMOTICS |
| Rated power - P2: | 45 kW |
| Mains frequency: | 50 Hz |
| Rated voltage: | 3 x 380-420D/660-725Y V |
| Rated current: | 80/46.5 A |
| Starting current: | 660 % |
| Cos phi - power factor: | 0.86 |
| Rated speed: | 1478 rpm |
| IE efficiency: | IE3 94,2% |
| IE Efficiency class: | IE3 |
| Motor efficiency at full load: | 94.2 % |
| Motor efficiency at 3/4 load: | 94.9 % |
| Motor efficiency at 1/2 load: | 95 % |
| Number of poles: | 4 |
| Enclosure class (IEC 34-5): | IP55 |
| Insulation class (IEC 85): | F |
| Motor No: | 99032214 |
| Bearing insulation type N-end: | Steel Bearing |
| Others: | |
| Minimum efficiency index, MEI ≥: | 0.50 |
| Net weight: | 752 kg |
| Gross weight: | 802 kg |
| Shipping volume: | 1.75 m³ |
| Language on pump nameplate: | GB |
Spare Parts
| Part Number | Product Name |
|---|---|
| 96939615 | Kit, Wear ring |
| 97757676 | Spare, O-ring |
| 98164277 | Spare, Plug vent |
| 98434943 | Spare, Shaft seal |
Applications
- Commercial air conditioning — Improve user comfort and reduce life-cycle costs with intelligent pumps that integrate easily into your air-based or hydronic cooling system.
- Industrial heating — Solutions for industrial heating applications meet great demands every day from very high temperatures to delicate processes that require extreme precision. There is a high efficiency heat pump from Grundfos for any need.
- Irrigation — Our high-efficiency pumping solutions work seamlessly with modern irrigation systems for agricultural and non-agricultural applications and can operate with on- and off-grid energy sources.
category
- Endsuction close coupled single stageEnd-suction close-coupled single-stage pumps are common in every industrial facility and water treatment plant in the world. Available in both a vertical and horizontal design, the end-suction close-coupled single-stage pumps are easy to install thanks to the compact size and the 90 degree angle from inlet to outlet.