KRS2 | 3-phase / 50Hz

Three-phase cast iron slurry-handling pumps. With a generous solids capacity, they are equipped with a chromium iron agitator, that assists with the smooth suction of large solids.

Technical Data

  • Discharge bore mm: 4" BSPT,6" BSPT,8" BSPT,3" BSPT
  • Head max. m: 15,8 - 31,0
  • Capacity max. l/min: 1670 - 4300
  • Motor output kW: 4,0 - 18,0
  • Phases: 3
  • Max. solid handling ø mm: 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
KRS2-80 3" BSPT 3 4,0 15,8 1670 30
KRS2-100 4" BSPT 3 6,0 17,1 2350 30
KRS2-150 6" BSPT 3 9,0 22,0 3250 30
KRS-200 8" BSPT 3 18,0 31,0 4300 30

Discharge bore mm 3" BSPT
Phases 3
Motor output kW 4,0
Head max. m 15,8
Capacity max. l/min 1670
Max. solid handling ø mm 30

Discharge bore mm 4" BSPT
Phases 3
Motor output kW 6,0
Head max. m 17,1
Capacity max. l/min 2350
Max. solid handling ø mm 30

Discharge bore mm 6" BSPT
Phases 3
Motor output kW 9,0
Head max. m 22,0
Capacity max. l/min 3250
Max. solid handling ø mm 30

Discharge bore mm 8" BSPT
Phases 3
Motor output kW 18,0
Head max. m 31,0
Capacity max. l/min 4300
Max. solid handling ø mm 30
ø Discharge bore mm 80, 100, 150, 200
Discharge Connection Threaded flange/Hose coupling
Impeller Open type impeller
Shaft Seal Double mechanical seal
Bearings Shielded ball bearings
Impeller Chromium iron casting
Casing Grey iron casting EN-GJL-200
Suction Plate Chromium iron casting
Shaft Seal Silicon carbide in oil bath
Pumping Fluid
Type of Fluid Sludge, Slurry, Liquids containing sandy mud and/or bentonite
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
  • KRS2-80
  • KRS2-100
  • KRS2-150
  • KRS-200

The KRS-series of slurry-handling type is a submersible three-phase cast iron heavy-duty slurry pump driven by a 4-pole motor. Settled matter is mixed into a pumpable suspension with the equipped agitator. The other wear parts such as the impeller and the suction plate are also made of high-chromium cast iron for extra durability. The top discharge, side flow design assures efficient motor cooling even when it operates with its motor exposed to air.

Case studies


Pumping Bentonite

A Hungarian company was looking for a solution to pump bentonite in a deep construction site. Initially, high-speed pumps were used, but they did not deliver the desired performance.

The solution finally came with Tsurumi slow-speed pumps connected in series in a booster installation: The KRS2-150 is excellent for this abrasive application because it operates with fewer revolutions. The series connection provides the necessary power to pump the abrasive liquid over the required distance without any problems.

In a test installation, it was checked whether the solution actually worked in practice. The water containing bentonite was fed from a container about five metres up into the booster pump. It then pumped it through a 400-metre-long pipeline to the separation plant. The solution worked so well that the customer will now standardise this Tsurumi application.

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Sandtrap Issues

The WWT station of Freudenstadt suffered from the problem, that the installed pumps of another maker kept wearing out very fast in the challenging application of a sand trap. Due to the high percentage of sand in the medium to be pumped, normal sewage pumps in grey-cast-iron construction are in terms of material too weak to withstand the abrasion.

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