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Wilo-Flumen EXCEL-TRE 50 … 90 | Wilo

Wilo-Flumen EXCEL-TRE 50 … 90

Operationally reliable mixing, non-susceptible to clogging, of various kinds of wastewater and sludge in wastewater treatment

Your advantages
Wilo-Flumen EXCEL-TRE 90-2

Operationally reliable mixing, non-susceptible to clogging, of various kinds of wastewater and sludge in wastewater treatment

The highly efficient Wilo-Flumen EXCEL-TRE 50-3/60-3 series ensure operationally reliable continuous operation or control mode that is non-susceptible to clogging when mixing various kinds of wastewater and sludge in wastewater and sludge treatment.

Recommended services

Your advantages

  • Reliable continuous operation thanks to propellers that are non-susceptible to clogging and largely dimensioned gear bearings
  • High operational reliability by using stainless steel investment-cast propellers
  • Reduction of energy costs due to best thrust to power ratio possible thanks to optimised hydraulics with minimum cavitation tendency and standard-equipped IE3 motor
  • Customer-specific configuration taking into account the system parameters
  • Simple adaptation to the load cases due to operation with a frequency converter
  • Simple installation and removal, even when the basins are filled, thanks to an extensive accessories portfolio
  • Simple replacement due to adaptation to existing installations
Series description


Medium-speed submersible mixer with single-stage planetary gear, in continuous or intermittent operation.


  • Stormwater retention tanks
  • Activated sludge tank
  • Sludge treatment
  • Mixing and buffer basins
  • Special applications


For suspension and homogenisation in commercial areas of:

  • Process sewage
  • Sewage containing faeces
  • Wastewater (with small amounts of sand and gravel)


  • Thermal motor monitoring with bimetallic strip
  • Single-stage planetary gear
  • 3-chamber system
  • IE3-/IE4 submersible motor(according to IEC 60034-30)
  • Operation with frequency converter possible



Wilo-Flumen EXCEL-TRE 50-3.23-6/16Ex S17


Submersible mixer, horizontal


Series: Mixer with IE3/IE4 asynchronous motor


x10 = nominal propeller diameter in mm




x10 = nominal propeller speed in rpm


Number of poles


x10 = stator pack length in mm




Propeller code for special propeller (omitted for standard propeller)

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:
    • EXCEL-TRE 50-3/60-3: 1.4408 (ASTM A 351)



2- or 3-bladed propeller made of solid or composite material. Nominal propeller diameter of 500 mm to 900 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.

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-chamberThe 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 chamberThe 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 chamberThe 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.


Single-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 attached propeller and connection cable
  • 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


  • Mounting bracket for wall and floor fixation
  • Lowering device
  • Auxiliary lifting device
  • Cable bollard to secure the hoist cable
  • Adjustable stop
  • Additional rope anchoring
  • Fixation sets with anchor bolts

Installation and operating instructions

Wilo-Flumen OPTI-TR 50-3 ... 120-1, Wilo-Flumen EXCEL-TRE 50-3 ... 90-2

Article Number 6092613
Edition 2022-07
Number of pages 52
Language en
PDF (24 MB)

Certification booklet

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)


Efficiency for your Treatment Processes

Number of pages 20
Language en
PDF (6 MB)
Product selection
Product descriptionMax. immersion depth
Flumen EXCEL-TRE 50-3.23-6/16
20 m
Flumen EXCEL-TRE 50-3.23-6/16 E4
20 m
Flumen EXCEL-TRE 50-3.25-4/16
20 m
Flumen EXCEL-TRE 50-3.25-6/16
20 m
Flumen EXCEL-TRE 50-3.25-6/16 E4
20 m
Flumen EXCEL-TRE 50-3.27-4/12
20 m
Flumen EXCEL-TRE 50-3.27-4/12 E4
20 m
Flumen EXCEL-TRE 50-3.27-4/16
20 m
Flumen EXCEL-TRE 50-3.27-6/16
20 m
Flumen EXCEL-TRE 50-3.27-6/16 E4
20 m
Flumen EXCEL-TRE 50-3.28-4/12
20 m
Flumen EXCEL-TRE 50-3.28-4/12 E4
20 m
Flumen EXCEL-TRE 50-3.28-4/16
20 m
Flumen EXCEL-TRE 50-3.28-4/24
20 m
Flumen EXCEL-TRE 50-3.29-4/12
20 m
Flumen EXCEL-TRE 50-3.29-4/12 E4
20 m
Flumen EXCEL-TRE 50-3.29-4/16
20 m
Flumen EXCEL-TRE 50-3.29-4/24
20 m
Flumen EXCEL-TRE 50-3.30-4/16
20 m
Flumen EXCEL-TRE 50-3.30-4/24
20 m
Flumen EXCEL-TRE 50-3.31-4/16
20 m
Flumen EXCEL-TRE 50-3.31-4/24
20 m
Flumen EXCEL-TRE 50-3.34-4/16
20 m
Flumen EXCEL-TRE 50-3.34-4/24
20 m
Flumen EXCEL-TRE 50-3.37-4/24
20 m
Flumen EXCEL-TRE 60-3.13-6/16
20 m
Flumen EXCEL-TRE 60-3.13-6/16 E4
20 m
Flumen EXCEL-TRE 60-3.15-6/16
20 m
Flumen EXCEL-TRE 60-3.15-6/16 E4
20 m
Flumen EXCEL-TRE 60-3.16-6/16
20 m
Flumen EXCEL-TRE 60-3.16-6/16 E4
20 m
Flumen EXCEL-TRE 60-3.17-6/16
20 m
Flumen EXCEL-TRE 60-3.17-6/16 E4
20 m
Flumen EXCEL-TRE 60-3.18-6/16
20 m
Flumen EXCEL-TRE 60-3.18-6/16 E4
20 m
Flumen EXCEL-TRE 60-3.19-6/16
20 m
Flumen EXCEL-TRE 60-3.19-6/16 E4
20 m
Flumen EXCEL-TRE 60-3.20-4/12
20 m
Flumen EXCEL-TRE 60-3.20-4/12 E4
20 m
Flumen EXCEL-TRE 60-3.20-6/16
20 m
Flumen EXCEL-TRE 60-3.20-6/16 E4
20 m
Flumen EXCEL-TRE 60-3.21-6/16
20 m
Flumen EXCEL-TRE 60-3.21-6/16 E4
20 m
Flumen EXCEL-TRE 60-3.22-4/12
20 m
Flumen EXCEL-TRE 60-3.22-4/12 E4
20 m
Flumen EXCEL-TRE 60-3.22-4/16
20 m
Flumen EXCEL-TRE 60-3.23-6/16
20 m
Flumen EXCEL-TRE 60-3.23-6/16 E4
20 m
Flumen EXCEL-TRE 60-3.24-4/12
20 m
Flumen EXCEL-TRE 60-3.24-4/12 E4
20 m