Wilo-EMU polder pumps

Series description


Multistage submersible pump as polder pump for vertical installation


  • Potable and process water from tanks or shallow bodies of water
  • Municipal water supply
  • Sprinkling and irrigation
  • Lowering the water level
  • Industrial applications
  • Utilisation of geothermal energy
  • Utilisation in offshore areas

Type key

Example:Wilo-EMU K 127P-3 + M 9-2/75
Hydraulics:K 127P-3
K127Basic hydraulics
PPolder pump design
3Number of hydraulic stages
Motor:M 9-2/75
MSubmersible motor in special design for polder pump applications
9Overall size (8... = 8"; 9... = 10"; 12... = 12"; 15... = 16")
2Number of poles
75Package length

Special features/product advantages

  • Deep water reduction using self-cooling motors
  • Sturdy version made of cast iron or bronze
  • Compact design
  • Maintenance-friendly, rewindable motors
  • Optional Ceram CT coating increases efficiency

Technical data

  • Mains connection: 3~400 V, 50 Hz
  • Fluid temperature: 20 °C, higher temperatures on request
  • Minimum flow across outside shroud: not necessary
  • Max. sand content: 35 g/m3
  • Max. number of starts: 10/h
  • Protection class: IP 68
  • Control range for frequency converters:
    • 2-pole: 25-50 Hz
    • 4-pole: 30-50 Hz


  • Multistage submersible-motor pump with semi-axial impellers
  • Hydraulics and motor freely configurable according to power requirements
  • Three-phase motor for direct or star-delta starting
  • Rewindable motors


Polder pump for vertical installation.


Multistage polder pump with semi-axial hydraulics. Housing parts made of EN‐GJL with 2K‐coating or G‑CuSn10, impellers made of NiAl‐Bz. Pressure port as flange connection.


Motor above the hydraulics, surrounded by a flow shroud. Fluid flows around the motor during operation, permitting surfacing of the motor.

Three-phase motor with rewindable PVC‐insulated winding for direct and star-delta starting. Motor shroud made of A2/A4‐quality stainless steel or steel/G‐CuSn10. Standardised pump connection. Sealing of motor shaft achieved through the use of a double mechanical seal made of solid silicon carbide material.

Thrust bearing with rockers for absorption of high axial thrust. Negative axial thrust is absorbed by the counter-thrust bearing. Self-lubricating bearing. Motors are filled with water‐glycol mixture as standard. Alternatively, they can be filled with drinking water (T version). Frequency converter operation is permitted (SF 1.1).


The internal motor is cooled by the fluid. The limit values for the max. fluid temperature and the minimum flow rate must not be exceeded. The volume flow must not be interrupted during operation.


If the minimum water submersion is maintained, the motor can be surfaced during operation and used in continuous duty.

Scope of delivery

  • Hydraulics + motor fully assembled
  • Connecting cable approved for drinking water, cable cross-section and length per standard design or per customer request
  • Installation and operating instructions


  • Special materials
  • 60 Hz version
  • PT100 sensor for thermal motor monitoring

Duty chart

Pump curves



NEMA connection


Standardised connection

Integrated non-return valve


Without non-return valve

AC motor


Three-phase motor

Direct activation

Star-delta activation

FC operation

Motor with cast stator


Rewindable motor

Oil motor filling


Water-glycol motor filling

Drinking water motor filling


Hydraulics/motor preassembled


Horizontal installation


Vertical installation


Motor temperature monitoring, PT100


PTC motor temperature monitoring


Capacitor box for 1~230 V


Dry-running protection


Integrated lightning protection



Bearing brackets for horizontal installation


Cooling jacket


Non-return valve


Pressure shroud



Pump housing

On customer request

Pump housing (special version)

On customer request


On customer request

Impeller (special version)

On customer request

Motor housing

On customer request

Motor housing (special version)

On customer request


Certification Booklet Wilo-EMU K...P, KM...P, D...P

Article Number 6080450
Edition 1702
Version number 01
Page format A4
Number of pages 4

PDF (216 kB)


General overview

Edition 2017
Page format A4
Number of pages 72

PDF (46 MB)


Wilo-EMU polder pump

Version number 3.0
Page format A4
Number of pages 61

PDF (897 kB)


PDF: Wilo-EMU polder pumps


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