Wilo-EMU TR 50-2… – TR 120-1...

Series description


Submersible mixer with single-stage planetary gear


  • Generation of flow
  • Suspension of solid matter
  • Homogenization
  • Prevention of floating sludge layers

Type key

E.g.:Wilo-EMU TRE 90-2.20-4/12 x
TRSubmersible mixer
EHigh-efficiency motor in accordance with IE3/IE4 (derived from IEC 60034‑30)
90x 10 = nominal propeller diameter in mm
20x 10 = propeller speed in rpm
4Number of poles
12x 10 = stator length in mm
xPropeller code for welded propellers, e.g. S20 (without = PUR propeller)

Special features/product advantages

  • Secure your processes.
    The planetary gear has large dimensions so that the mixing forces are absorbed efficiently.
  • Efficient energy usage.
    The innovative blade geometry ensures the best possible specific thrust coefficient. At the same time, this reduces your energy and operating costs.
  • Reliable operation.
    Clogging-free operation with backward-curved incoming flow edge.

Technical data

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


  • Protection class IP X4D
  • Flexible installation via lowering device
  • Can be swivelled horizontally when installed with a lowering device
  • Can be freely placed in the basis when installing via a stand
  • Single-stage planetary gear


  • Housing parts: EN-GJL-250
  • Propeller: PUR, stainless steel 1.4571 or PUR/GRP
  • Propeller hub: Stainless steel 1.4571
  • Screwed connections: Stainless steel 1.4301 or 1.4571
  • Seal bushing: Stainless steel 1.4571
  • Gear shaft: Stainless steel 1.4462



2- or 3-bladed propeller with a nominal propeller diameter of 500 mm to 1200 mm. Clogging-free design made possible by backward-curved incoming flow edge.


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-sized inclined (not with TR 80-1) and grooved ball bearings ensure long service life of the motor bearings.

TRE units are equipped with high-efficiency TE motors which meet the IE3/IE4 classification (derived from IEC 60034‑30).


Sealing is achieved through the use of a 3-chamber system (pre-chamber, gear chamber and sealing chamber). The large-volume pre-chamber and sealing chamber collect leakage from the mechanical seal. If desired, the pre-chamber can be equipped with an external sealing chamber electrode. The sealing between the fluid and the pre-chamber, as well as between the gear and sealing chamber are realized by a corrosion-resistant and wear-proof mechanical seal made of solid silicon carbide material. The sealing between the pre-chamber and gear chamber as well as between the sealing chamber and motor are realised by radial sealing rings. A seal bushing ensures long-term corrosion-protected fit of the mechanical seal.


1-stage planetary gear with exchangeable transmissions. The gear bearings are dimensioned so that the resulting mixing forces are absorbed and are not transferred to the motor bearings.


The power cable is a type NSSHÖU cable for heavy mechanical loads. The power cable enters the motor housing through a water pressure-tight cable inlet with strain relief and bend protection. The individual wires as well as the cable sheath are additionally sealed to keep out fluids.


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. 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 control
  • Ceram C0 coating
  • Ex-rated to ATEX or FM


  • Lowering device
  • Stand for free positioning of the units in the basin
  • Auxiliary lifting device
  • 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 AVMS(H)/ AVUS(H)

Article Number 6078119
Edition 1509
Version number 02
Page format A4
Number of pages 29

PDF (529 kB)


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 80-1 (Uniprop with gear)

Version number 3.0
Page format A4
Number of pages 103

PDF (2 MB)


Wilo-EMU TR 50-2 ... TR 90-2 (Uniprop with gear)

Version number 3.0
Page format A4
Number of pages 109

PDF (3 MB)



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