NKZ | 3-phase / 50Hz

Three-phase slurry pumps, in cast iron, with a built-in agitator to stir and mix settled matters. Heavy duty design including side discharge, spiral casing, water cooling jacket and a 4 pole motor for increased wear resistance.

Technical Data

  • Discharge bore mm: 3" BSPT,4" BSPT
  • Head max. m: 12,6 - 28,8
  • Capacity max. l/min: 930 - 2440
  • Motor output kW: 2,2 - 11,0
  • Phases: 3
  • Max. solid handling ø mm: 20 - 30
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
NKZ3-C3 3" BSPT 3 2,2 12,6 930 30
NKZ3-D3 3" BSPT 3 3,7 17,0 1540 30
NKZ3-80H 3" BSPT 3 5,5 24,9 1530 20
NKZ3-100H 4" BSPT 3 11,0 28,8 2440 20

Discharge bore mm 3" BSPT
Phases 3
Motor output kW 2,2
Head max. m 12,6
Capacity max. l/min 930
Max. solid handling ø mm 30

Discharge bore mm 3" BSPT
Phases 3
Motor output kW 3,7
Head max. m 17,0
Capacity max. l/min 1540
Max. solid handling ø mm 30

Discharge bore mm 3" BSPT
Phases 3
Motor output kW 5,5
Head max. m 24,9
Capacity max. l/min 1530
Max. solid handling ø mm 20

Discharge bore mm 4" BSPT
Phases 3
Motor output kW 11,0
Head max. m 28,8
Capacity max. l/min 2440
Max. solid handling ø mm 20
ø Discharge bore mm 80, 100
Discharge Connection Threaded flange/Hose coupling
Impeller Open type impeller
Shaft Seal Double mechanical seal
Bearings Shielded ball bearings
Impeller Ductile iron casting EN-GJS-700-2, Chromium iron casting
Casing Grey iron casting EN-GJL-200
Suction Plate Grey iron casting EN-GJL-200, Ductile iron casting EN-GJS-700-2
Shaft Seal Silicon carbide in oil bath
Pumping Fluid
Type of Fluid Liquids containing sandy mud, Sand carrying water
Temperature 0-40°C
Type, Poles Induction motor, 4 poles, IP68
Insulation Insulation class E, Insulation class B
Phase / Voltage 3-phase / 400V / 50Hz / d.o.l.
Motor Protector (built-in) Circle thermal cut-out
Lubrication Turbine oil (ISO VG32)
Casing Grey iron casting EN-GJL-150
Shaft Stainless steel EN-X30Cr13
Cable Rubber, NSSHÖU
Dimensions in mm:
W1: lowest running water level
  • NKZ3-C3
  • NKZ3-D3
  • NKZ3-80H
  • NKZ3-100H

The NKZ-series is a submersible three-phase cast iron heavy-duty slurry pump driven by a 4-pole motor. It is equipped with an agitator that assists smooth suction of settled matters. The side discharge, spiral design allows smoother passage of the sucked solid matters. The motor is cooled by a water jacket that assures efficient motor cooling even when it operates with its motor exposed to air. The use of guide rail fitting system improves convenience in the facilities such as, iron works, ready-mixed concrete plants, and wastewater treatment plants where the pump is to be installed with a fixed discharge piping.

Case studies


Jet Grouting

In Cologne, Germany a new subway was built near the city centre. Before construction with a tunnel boring machine could even begin, the surrounding buildings had to be stabilized by a injection of a cement suspension. This process is called jet grouting. Two shafts were installed. From here, work was carried out to stabilise the foundations of the adjacent residential buildings. Depending on the shaft, different numbers of transverse boreholes with a depth of up to 50m were drilled. The boreholes were then grouted with a cement suspension.

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