Grundfos NK 40-250/260 AA2F2BESBAQERW1
Product ID: 98318819
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Grundfos NK 40-250/260 AA2F2BESBAQERW1
Grundfos NK 40-250/260 AA2F2BESBAQERW1
Non-self-priming, single-stage, centrifugal pump designed according to ISO 5199 with dimensions and rated performance according to EN 733. Flanges are PN 16 with dimensions according to EN 1092-2. The pump has an axial suction port, a radial discharge port and horizontal shaft. It is of the back pull-out design enabling removal of the motor, coupling, bearing bracket and impeller without disturbing the pump housing or pipework. The unbalanced rubber bellows seal is according to DIN EN 12756.
| Controls: | |
| Frequency converter: | None |
| Pressure sensor: | N |
| Liquid: | |
| Pumped liquid: | Water |
| Liquid temperature range: | 0 .. 120 °C |
| Selected liquid temperature: | 20 °C |
| Density: | 998.2 kg/m³ |
| Technical: | |
| Pump speed on which pump data are based: | 2955 rpm |
| Rated flow: | 67.25 m³/h |
| Pump with motor (Yes/No): | Y |
| Rated head: | 82.65 m |
| Actual impeller diameter: | 260 mm |
| Nominal impeller diameter: | 250 |
| Primary shaft seal: | BAQE |
| Code for shaft seal: | BAQE |
| Mechanical seal type: | Single |
| 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: | Bronze |
| CuSn10-C | |
| Internal pump house coating: | CED |
| Shaft: | Stainless steel |
| EN 1.4301 | |
| AISI 304 | |
| Installation: | |
| Maximum ambient temperature: | 55 °C |
| Maximum operating pressure: | 16 bar |
| Pipe connection standard: | EN 1092-2 |
| Type of inlet connection: | DIN |
| Type of outlet connection: | DIN |
| Size of inlet connection: | DN 65 |
| Size of outlet connection: | DN 40 |
| Pressure rating for connection: | PN 16 |
| Coupling type: | Flexible w/spacer |
| Base frame design: | EN/ISO |
| Code for base frame: | 8 |
| Grouting (Yes/No): | N |
| Electrical data: | |
| Motor type: | INNOMOTICS |
| Rated power - P2: | 30 kW |
| Mains frequency: | 50 Hz |
| Rated voltage: | 3 x 380-420D/660-725Y V |
| Rated current: | 53/31 A |
| Starting current: | 700 % |
| Cos phi - power factor: | 0.87 |
| Rated speed: | 2955 rpm |
| IE efficiency: | IE3 93,3% |
| IE Efficiency class: | IE3 |
| Motor efficiency at full load: | 93.3 % |
| Motor efficiency at 3/4 load: | 93.5 % |
| Motor efficiency at 1/2 load: | 92.9 % |
| Number of poles: | 2 |
| Enclosure class (IEC 34-5): | IP55 |
| Insulation class (IEC 85): | F |
| Motor No: | 98943360 |
| Bearing insulation type N-end: | Steel Bearing |
| Others: | |
| Minimum efficiency index, MEI ≥: | 0.70 |
| Net weight: | 413 kg |
| Gross weight: | 440 kg |
| Shipping volume: | 0.962 m³ |
| Language on pump nameplate: | GB |
Spare Parts
| Part Number | Product Name |
|---|---|
| 96039654 | Kit, Shaft |
| 96579598 | Kit, Bearing |
| 96810100 | Spare, Wear ring |
| 96810103 | Spare, Wear ring |
| 96939128 | Kit, Nut |
Applications
- Commercial heating — In a commercial heating system, energy-efficient pumps are only half the story. But with the right system design, you can truly reap the benefits and significantly reduce the energy bill.
category
- Endsuction long coupled single stageEnd-suction long-coupled single-stage pumps are ideal for large-scale industrial applications. As with all end-suction pumps, the liquid runs directly into the impeller and the inlet and outlet form a 90 degree angle to each other. The long-coupled design makes the pumps easy to service and maintain.