Wilo-EMU TR 14… – TR 28…

Series description


Compact directly driven submersible mixer


  • Swirling of deposits and solids in stormwater retention tanks and pump sump
  • Destruction of floating sludge layers

Type key

E.g.:Wilo-EMU TR 21.145-4/11 S10
TRSubmersible mixer
21x 10 = nominal propeller diameter in mm
145x 10 = propeller speed in rpm
4Number of poles
11x 10 = stator length in mm
S10Propeller code for welded propellers (without = PUR propeller)

Special features/product advantages

  • Works reliably.
    Clogging-free operation with backward-curved incoming flow edge and self-cleaning helix hub.
  • Reduced costs.
    Quick and simple to install as a ground, wall or pipe fixation. Even in the smallest of space requirements.

Technical data

  • Mains connection: 3~400 V, 50 Hz
  • Submerged operating mode: S1
  • Protection class: IP 68
  • Max. fluid temperature: 40 °C
  • Mechanical shaft seal with SiC/SiC pairing
  • Permanently lubricated roller bearings
  • Max. immersion depth: 20 m


  • Stationary installation on walls and floors
  • Flexible installation through the use of lowering device or special pipe attachment
  • Can be swivelled vertically and horizontally during installation with lowering device


  • Housing parts made of EN‐GJL
  • Propeller made of PUR or stainless steel
  • Propeller hub made of stainless steel
  • Screwed connections made of stainless steel



2-bladed propeller with a nominal propeller diameter of 140 mm to 280 mm. Clogging-free construction thanks to backward-curved incoming flow edge and patented helix hub.


Wilo-submersible motor of the T-series (surface-cooled motor) with standard connection for an easy and efficient adaptation of the motor power. The motor heat is given off directly to the fluid via the housing. The winding is equipped with a temperature monitor. Large grooved ball bearings ensure long service life of the motor bearings.


Double shaft sealing with large-volume sealing chamber to collect leakage from the mechanical seal; available with external sealing chamber electrode upon request. On the motor and fluid side, a corrosion- and wear-resistant mechanical seal made of solid silicon carbide material is used. A seal bushing ensures long-term corrosion-protected fit of the mechanical seal.


The power supply cable is a type H07 cable for heavy mechanical loads. The power cable enters the motor housing through a water pressure-tight cable lead-in with strain relief and bend protection.


A separate configuration must be carried out for each application to ensure optimum generation of fluid current. Carefully follow the instructions for the supplied configuration when installing the units.


Immersed operating mode S1:

The unit can be used immersed in continuous duty (max. 1000 h/year). Surfacing the propeller or motor is strictly prohibited. In the case of fluctuating fluid levels, the system should switch off automatically if the degree of water submersion drops below the minimum level.

When installing the power cables, make sure that they are not drawn into the propeller by the fluid current.


  • Special voltages
  • Thermistor temperature sensor
  • External sealing chamber monitoring
  • Ceram C0 coating
  • Ex-rated to ATEX or FM


  • Lowering device
  • Auxiliary lifting device
  • Wall and floor fixation bracket
  • Special fastening pieces for the use of an auxiliary lifting device for multiple units
  • Terminal stop
  • Additional rope anchoring
  • Fixation sets with anchor bolts

Scope of delivery

  • Submersible mixer with mounted propeller and cable
  • Cable length per customer request
  • Accessories per customer request
  • Operating and maintenance manual





Gear chamber


Sealing chamber

directly driven

FC operation

Single-stage planetary gear


Two-stage planetary gear


Sealing by mechanical seal on motor side

Sealing by rotary shaft seal on motor side


Sealing by mechanical seal on fluid side

Seal for rotary shaft seal on fluid side


Explosion protection



Wet well installation, ground installation

Wet well installation, wall fixation

Lowering device for wet well installation

Tripod for wet well installation



Cast propeller


Steel propeller

PUR propeller

PUR/GRP propeller


GRP propeller



Motor temperature monitoring, bimetal

PTC motor temperature monitoring


Motor leakage monitoring

Sealing chamber monitoring


Propeller blades can be replaced individually



Certification Booklet Wilo-EMU AVU

Article Number 6078118
Edition 1509
Version number 02
Page format A4
Number of pages 29

PDF (522 kB)


Certification Booklet Wilo-EMU TR(E) / Wilo-Sevio MIX BG / Wilo-Sevio FLOW BG

Article Number 6074694
Edition 1702
Version number 02
Page format A4
Number of pages 32

PDF (1 MB)


Certification Booklet Wilo-EMU HHV

Article Number 6072705
Edition 1509
Version number 03
Page format A4
Number of pages 32

PDF (606 kB)


Drainage and Sewage

Page format A4
Number of pages 24

PDF (8 MB)


General overview

Edition 2017
Page format A4
Number of pages 72

PDF (46 MB)


Wilo-EMU TR 14 ... TR 28 (Miniprop)

Version number 3.0
Page format A4
Number of pages 85

PDF (2 MB)



PDF: Wilo-EMU TR 14… – TR 28…


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