NK | 1-phase / 50Hz

Strong single-phase drainage pumps capable of large flows at high heads. Provides excellent performance in harsh operating conditions. A high-performance 2,2kW motor enables long periods of operation while partially submerged.

Technical Data

  • Discharge bore mm: 2" BSPT,3" BSPT
  • Head max. m: 18,0 - 24,0
  • Capacity max. l/min: 525 - 800
  • Motor output kW: 2,2
  • Phases: 1
  • Max. solid handling ø mm: 8,5
Performance curve

Model Colour code curve Discharge bore mm Phases Motor output kW Head max. m Capacity max. l/min Max. solid handling ø mm
NK4-22 2" BSPT 1 2,2 24,0 525 8,5
NK3-22L 3" BSPT 1 2,2 18,0 800 8,5

Discharge bore mm 2" BSPT
Phases 1
Motor output kW 2,2
Head max. m 24,0
Capacity max. l/min 525
Max. solid handling ø mm 8,5

Discharge bore mm 3" BSPT
Phases 1
Motor output kW 2,2
Head max. m 18,0
Capacity max. l/min 800
Max. solid handling ø mm 8,5
ø Discharge bore mm 50, 80
Discharge Connection Threaded flange/Hose coupling
Impeller Semi-Vortex impeller
Shaft Seal Double mechanical seal
Bearings Shielded ball bearings
Impeller Ductile iron casting EN-GJS-700-2, Chromium iron casting
Casing BR+natural rubber, Grey iron casting EN-GJL-200
Shaft Seal Silicon carbide in oil bath
Pumping Fluid
Type of Fluid Spring water, Rain water, Ground water, Sand carrying water
Temperature 0-40°C
Type, Poles Induction motor, 2 poles, IP68
Insulation Insulation class F, Insulation class B
Phase / Voltage Single phase 230V / 50Hz
Motor Protector (built-in) Circle thermal cut-out
Lubrication Turbine oil (ISO VG32)
Casing Aluminium die casting
Shaft Stainless steel EN-X6Cr13, Stainless steel EN-X30Cr13
Cable Rubber, 10m H07RN8-F
Dimensions in mm:
W1: lowest running water level
  • NK4-22
  • NK3-22L

The NK-series is a submersible single-phase portable drainage pump equipped with a massive output motor of 2.2kW. It is the largest single phase motor available in the Tsurumi protfolio providing all the benefits of a 3phase pump with the advantage of connecting to a 230V power supply. The top discharge, side flow design assures efficient motor cooling even when it operates with its motor exposed to air.The slim design allows the pump to be placed in a confined space.