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Wilo-Flumen EXCEL-TRE 20 … 40 | Wilo

Wilo-Flumen EXCEL-TRE 20 … 40

The most effective solution for draining stormwater retention tanks and pump sumps.

Your advantages
Wilo-Flumen EXCEL-TRE 20

The most effective solution for draining stormwater retention tanks and pump sumps.


Recommended services

Your advantages

  • Low cleaning work by avoiding deposits during basin draining thanks to installation close to the groundnd
  • Low clogging rate and reliable operation thanks to optimised hydraulics
  • Low-wearing, due to the use of stainless steel precision-cast propellers with the lowest cavitation tendency
  • A wide range of possible uses in diverse applications, even at high-interval running times
  • Reduction of the energy and operating costs due to the standard use of IE3 motors for the best possible thrust coefficient
  • High flexibility thanks to the most diverse installation options and accessories
Series description


Fast running, directly driven submersible mixer, in continuous or intermittent operation.


  • Stormwater retention tanks
  • Pump sump
  • 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
  • IE3 submersible motor(according to IEC 60034-30)
  • Operation with frequency converter possible



Wilo-Flumen EXCEL-TRE 30.145-4/16Ex S17


Submersible mixer, horizontal


Series: Mixer with IE3 asynchronous motor


x10 = nominal propeller diameter in mm


Rated 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: 3~460 V, 60 Hz
  • Fluid temperature: 37 … 104 °F
  • Submerged operating mode: continuous duty (S1)
  • Protection class: permanently submerged (IP68)
  • Insulation class: H
  • Max. switching frequency: 15/h
  • Max. immersion depth: 66 ft


  • Motor housing: ASTM A 351 or ASTM A48 Class 35/40B
  • Seal housing: ASTM A 351
  • Seal:
    • On the motor side: SiC/SiC or nitrile
    • Fluid side: SiC/SiC
  • Propeller: ASTM A 351



2- or 3-bladed propeller made of solid material with a nominal propeller diameter of 8 in to 16 in. Clogging-free propeller geometry design made possible by backward-curved incoming flow edge.


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 33 ft long as standard.

The submersible motor meets the IE3 motor efficiency class (according to IEC 60034-30).


Large-volume sealing chamber with double shaft sealing. The sealing chamber is filled with white oil and absorbs the leakage from the seal on the fluid side. A corrosion- and wear-resistant mechanical seal is used on the fluid side. The seal on the motor side involves either a rotary shaft seal or a mechanical seal.

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 140 °F, depending on the motor type and motor capacity
  • Sealing 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 20-1, 22, 28-1, 30-1, 40-1, Wilo-Flumen EXCEL-TRE 20, 30, 40

Article Number 6074717
Edition 2021-10
Page format 215.9 x 279.4 mm
Number of pages 100
PDF (18 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
Page format 209.9 x 297.0 mm
Number of pages 68
PDF (37 MB)

Certificate REACH

REACH Regulation

Edition 2021-05
Page format 209.9 x 297.0 mm
Number of pages 4
PDF (262 KB)

Product selection
Product descriptionMax. immersion depth
Flumen EXCEL-TRE 20.174-4/13 S7
20 m