Grundfos NB 250-450/377 AASF1AESBQQESW5
Product ID: 98976246
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Grundfos NB 250-450/377 AASF1AESBQQESW5
Grundfos NB 250-450/377 AASF1AESBQQESW5
Non-self-priming, single-stage, centrifugal volute pump designed according to ISO 5199 with dimensions and rated performance according to EN 733 (10 bar). Flanges are PN 10 with dimensions according to EN 1092-2. The pump has an axial suction port, radial discharge port, horizontal shaft and a back pull-out design enabling removal of the motor, motor stool, cover and impeller without disturbing the pump housing or pipework. The unbalanced rubber bellows seal is according to DIN EN 12756. The
| 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: | 985 rpm |
| Rated flow: | 504.9 m³/h |
| Rated head: | 20 m |
| Actual impeller diameter: | 377 mm |
| Nominal impeller diameter: | 450 |
| 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): | Y |
| Electrical data: | |
| Motor type: | INNOMOTICS |
| Rated power - P2: | 37 kW |
| Mains frequency: | 50 Hz |
| Rated voltage: | 3 x 380-420D/660-725Y V |
| Rated current: | 67.0/39.0 A |
| Starting current: | 700 % |
| Cos phi - power factor: | 0.85 |
| Rated speed: | 985 rpm |
| IE efficiency: | IE3 93,3% |
| IE Efficiency class: | IE3 |
| Motor efficiency at full load: | 93.3 % |
| Motor efficiency at 3/4 load: | 94.0 % |
| Motor efficiency at 1/2 load: | 94.0 % |
| Number of poles: | 6 |
| Enclosure class (IEC 34-5): | IP55 |
| Insulation class (IEC 85): | F |
| Motor No: | 83W15434 |
| Bearing insulation type N-end: | Steel Bearing |
| Others: | |
| Minimum efficiency index, MEI ≥: | 0.70 |
| Net weight: | 954 kg |
| Gross weight: | 1000 kg |
| Shipping volume: | 1.75 m³ |
| Danish VVS No.: | 386069458 |
| Language on pump nameplate: | GB |
Spare Parts
| Part Number | Product Name |
|---|---|
| 96939614 | Kit, Wear ring |
| 97757677 | Spare, O-ring |
| 98164277 | Spare, Plug vent |
| 98434945 | 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.