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Wilo-EMU TR 216… – TR(E) 326… | Wilo
Your advantages
Wilo-EMU TRE 312 side view ceram coating

Your advantages

  • Efficient energy usage. The innovative blade geometry and energy-efficient IE3/IE4 motors ensure the best possible specific thrust coefficient. At the same time, this reduces your energy and operating costs.
  • Consistently reliable. The low-wearing GFK/PA6 propeller is durable and scores with its self-cleaning effect.
  • Smooth running thanks to the balanced propeller load, even in high thrust ranges and when incoming flow conditions are unfavourable.

Recommended services

Series description


Low-speed submersible mixer with two-stage planetary gear, in continuous or intermittent operation.


  • Activated sludge tank
  • 4th cleaning stage
  • Special applications


For homogenisation and flow generation in commercial areas of:

  • Process sewage
  • Sewage containing faeces


  • Thermal motor monitoring with bimetallic strip
  • Two-stage planetary gear
  • 3-chamber system
  • Operation with frequency converter possible

Additional equipment of the submersible mixers EMU TRE ...

  • IE3 submersible motor(according to IEC 60034-30)



Wilo-EMU TRE 326-3.24-6/16Ex


Submersible mixer, horizontal



  • TR: Mixer with standard asynchronous motor
  • TRE: Mixer with IE3/IE4 asynchronous motor


Number of blades


x100 = nominal propeller diameter in mm




Rated propeller speed in rpm


Number of poles


x10 = stator pack length in mm



Technical data

  • Mains connection: 3~400 V, 50 Hz
  • Fluid temperature: 3 … 40 °C (37 … 104 °F)
  • Submerged operating mode: S1
  • Protection class: IP68
  • Insulation class: H
  • Max. switching frequency: 15/h
  • Max. immersion depth: 20 m (66 ft)


  • Housing: EN-GJL-250 (ASTM A48 Class 35/40B)
  • Seal:
    • Motor/sealing chamber: FPM (FKM)
    • Gasket/gear chamber: SiC/SiC
    • Gear chamber/pre-chamber: FPM (FKM)
    • Fluid side: SiC/SiC
  • Propeller hub: EN-GJL-250 (ASTM A48 Class 35/40B) or 1.4571 (AISI 316TI)
  • Propeller: GFK-VE (GFRP-VE) or PA6G



2- or 3-bladed propeller made of solid or composite material. Nominal propeller diameter of 500 mm to 1200 mm with clogging-free propeller geometry.


Surface-cooled submersible motor in three-phase current design with permanently lubricated und large-size rolling bearings. The motor winding is equipped with temperature monitoring. The motor heat is given off directly to the surrounding fluid via the motor housing. The connection cable is designed for heavy mechanical loads, sealed water pressure-tight against the fluid and is sealed longitudinally watertight. The connection cable has bare cable ends and is 10 m (33 ft) long as standard.

EMU TRE models:

The submersible motor meets the IE3/IE4 motor efficiency class (according to IEC 60034-30). Motors of the motor efficiency class “IE4” have been specified as “E4” in the motor designation.


The system is sealed by a 3-chamber system:

  • Pre-chamber
  • Gear chamber
  • Sealing chamber


The high-volume pre-chamber has been filled with gear oil to absorb any leakage at the seal on the fluid side. A mechanical seal is used as the seal on the fluid side. A rotary shaft seal seals towards the gear chamber.

Gear chamber

The gear chamber has been filled with gear oil to guarantee continuous lubrication of the planetary gear and the gear bearings. A mechanical seal seals towards the sealing chamber.

Sealing chamber

The high-volume sealing chamber is filled with white oil and absorbs any leakage from the gear chamber. A rotary shaft seal seals towards the motor.


Two-stage planetary gear with exchangeable transmission. Gear bearings have been dimensioned large to absorb resulting stirring forces and not transfer these to the motor bearing.

Scope of delivery

  • Submersible mixer with connection cable
  • Propeller hub
  • Propeller blade
  • Accessories attached, depending on the installation type
  • Installation and operating instructions


  • Thermal motor monitoring as temperature controller and temperature limiter
  • Thermal motor monitoring with PTC sensor
  • Fluid temperatures up to 60 °C (140 °F), depending on the motor type and motor capacity
  • Pre-chamber monitoring
  • Ex-rated in accordance with ATEX, FM and IEC-Ex
  • Ceram coating for housing parts made of grey cast iron
  • IE4 submersible motor(according to IEC 60034-30)


  • Lowering device
  • Auxiliary lifting device
  • Cable bollard to secure the hoist cable
  • Additional rope anchoring
  • Fixation sets with anchor bolts

Installation and operating instructions

Wilo-EMU TR/TRE 216 ... 326-3

Article Number 6088789
Edition 2021-10
Number of pages 88
Language en, zh
PDF (9 MB)

Wilo-EMU TR/TRE 216 ... 326-3

Article Number 6088786
Edition 2021-10
Number of pages 48
Language en
PDF (8 MB)

Wilo-EMU TR/TRE 212 up to 326 - Propeller assembly

Article Number 6065885
Edition 2011-12
Number of pages 168
Language bg, cs, da, de, el, en, es, et, fi, fr, hr, hu, it, lt, lv, nl, no, pl, pt, ro, ru, sk, sl, sv, tr, uk
PDF (6 MB)

Certification booklet


Article Number 6078119
Edition 1509
Number of pages 29
Language language neutral
PDF (516 KB)


Article Number 6078118
Edition 1509
Number of pages 29
Language language neutral
PDF (509 KB)

CE-Booklet Wilo-EMU TR(E) / Wilo-Flumen OPTI-TR / Wilo-Flumen EXCEL-TRE / Wilo-Sevio MIX BG / Wilo-Sevio FLOW BG

Article Number 6074694
Edition 2019-02
Number of pages 36
Language language neutral
PDF (3 MB)

Wilo-Flumen OPTI-TR 20-1 ... 40-1, Wilo-Flumen EXCEL-TRE 20 ... 40, Wilo-Flumen OPTI-TR 50-3 ... 120-1, Wilo-Flumen EXCEL-TRE 50-3 ... 90-2, Wilo-EMU TR 50-2 ... 120-1, Wilo-EMU TRE 50-2 ... 90-2, Wilo-EMU TR/TRE 212 ... 326-3

Article Number 6074694
Edition 2023-10
Number of pages 68
Language en
PDF (37 MB)


Biological treatment with efficiency.

Number of pages 20
Language en
PDF (12 MB)

Efficiency for your Treatment Processes

Number of pages 20
Language en
PDF (6 MB)



Article Number 6072705
Edition 1509
Number of pages 32
Language language neutral
PDF (592 KB)