Grundfos

NK 250-420/428

Code: 93564079 EAN: 5715474524512
Type NK
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Technical specifications

Pump typeNK
Nominal flow (m³/h)729.3 m³/h
Nominal head (m)22.59 m
Minimum efficiency index (MEI)0.70
Power P2 (kW)55 kW
Phases3
Voltage (V)380-400/660-690 V
Frequency (Hz)50 Hz
Enclosure classIP55 (Protect. water jets/dust)
Frequency converterNone
Max. liquid temp. (°C)120 °C
Min. liquid temp. (°C)-25 °C
Max. ambient temp. (°C)40 °C
Max. operating pressure10 bar
Connection pressure ratingPN 10
Pump housing materialDuctile iron
Impeller materialStainless steel
Shaft sealBQQE
Gross weight1480 kg
Net weight1370 kg
Motor number92816797
EAN code5715474524512

Performance curve

Performance curve NK 250-420/428

Hover over the curve to read flow and head at any point.

Documents and datasheets

Variants & alternative codes

Equivalent alternatives

Pumps in the same hydraulic class as 93564079 (equivalent flow and head), available in the catalogue.

Grundfos 93564079