Wilo-EMU TR 14… – TR 28…

Series description


Compact directly driven submersible mixer


  • Swirling of deposits and solids in rain spillway basin and pump sump
  • Destruction of floating sludge layers
  • Other areas of application in agriculture and water supply

Type key

Example:Wilo-EMU TR 21.174-4/11 S10
TRSubmersible mixer
21x 10 = nominal propeller diameter in mm
174x 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


  • Stationary installation on wall and floor
  • Flexible installation through the use of lowering device or special pipe attachment
  • can be swivelled vertically and horizontally when installed with a lowering device


  • Housing components: A 48 Class 35/40 B (EN-GJL-250)
  • Propeller: PUR or AISI 316TI (1.4571)
  • Propeller hub: AISI 316TI (1.4571)
  • Screwed connections: AISI 304 (1.4301) or AISI 316TI (1.4571)
  • Seal bushing: AISI 316TI (1.4571)



2-blade propeller with a nominal propeller diameter of 5.5 inch (140 mm) to 11 inch (280 mm). Entwining-free design made possible by backward-curved incoming flow edge and patented helix hub.


Wilo-submersible motor of the T-series with standard connection for an easy and efficient adaptation of the motor output. The motor heat is given off directly to the fluid via the housing. The winding is equipped with a temperature monitor. Large-sized 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 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.


Operating mode S1 ‐ permanent operation:

The submersible mixer must be immersed when operated. Surfacing the propeller 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. The power cables must be installed in a way that these cannot be drawn into the propeller!


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


Scope of delivery

  • Submersible mixer with mounted propeller hub 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



PDF: Wilo-EMU TR 14… – TR 28…


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