Wilo-Vardo WEEDLESS-F | Wilo


Your advantages

Your advantages

  • Optimum agitation in basin with square or rectangular floor plan
  • Operational reliability owing to wear-resistant propeller
  • Easy installation for existing systems
  • Floating version for basins with alternating water levels
Series description


Low-speed vertical mixer with gear motor


The mixers are suitable for both intermittent and continuous duty in wastewater and sewage (with and without faeces) as well as in sludge:

  • For suspension of solid matter
  • For homogenisation


  • Drive unit
  • Variable length of the mixer shaft
  • 2-blade or 3-blade propeller



Wilo-Vardo WEEDLESS-F.5.A1.A.A-00.A-00


Mixer, vertical


Mixer with gear motor


Mixer version

F = Vertical mixer securely attached

S = Vertical mixer installed floating

M = Vertical mixer with two propeller levels




Gear motor version depends on size

  • A ... E: Performance indicator
  • 1 ... 8: Mains connection version
  • 9: Special version


Motor plate version

  • A ... L: = Motor plate version without Ex
  • M ... Y = Motor plate version with Ex
  • Z = Special version


Mixer shaft version


B = MSS-A2 / MSM-A2

C = MSS-A4 / MSM-A4

Z = Special version

00 = Mixer shaft length in dm


Propeller unit version

  • A ... X: Code for number of propeller blades, setting angle and flow direction
  • 00: Propeller diameter in dm

Technical data


  • Max. circulation capacity: 7.5 m³/s
  • Propeller diameter: 2.50 m ... 1.50 m
  • Diameter of mixer shaft: 70 ... 114 mm
  • Shaft length: from 2 m
  • Fluid temperature: 3 ... 40 °C

Drive unit

  • Mains connection: 3~400 V, 50 Hz/3~460 V, 60 Hz
  • Drive power: 0.37 ... 7.50 kW
  • Operating mode: S1
  • Protection class: IP55, with protective fan cover
  • Insulation class: F (155 °C)
  • Ambient temperature: -20 ... +40 °C


  • Motor housing: EN-AC
  • Gear housing: EN-GJL-200
  • Output shaft: Steel (C 45)
  • Motor plate:
    • Steel, hot-galvanised
    • Stainless steel A2
    • Stainless steel A4
  • Mixer shaft:
    • Steel, coated
    • Stainless steel A2
    • Stainless steel A4
  • Rotary shaft seals: FKM
  • Hub: PUR/A4
  • Propeller blades: PUR


Vertical mixer for permanent installation in basins, on platforms or mounting brackets. Floating version for free placement in the basin.

Drive unit

Mixer-type gear motors with mixer lantern and additional bearing are used as the drive unit. Rated power of 0.37 kW to 7.5 kW in motor efficiency class IE3. High-efficiency IE4 versions are also available as an option. The motors are suitable for continuous duty. The drive unit can also be complemented with different options (e.g. suitability for explosive environments).

Motor plate

The motor plate connects the drive unit to the structure by suitable fixations. The motor plate can be modified to system-specific requirements to do this. A gas-tight version is also available. This version facilitates operation in potentially explosive atmospheres.

Mixer shaft

The mixer shaft made of thick-walled, hollow steel links the drive unit to the propeller unit. Shrink discs and tensioning kits connect the components to the drive and propeller unit.


2-blade or 3-blade solid propeller with a nominal propeller diameter of 2500 mm to 1500 mm. The individual propeller blades are attached to a hub on the mixer shaft. Here, the propeller blade angle can be set to 30, 35, 40 or 45°. The flow direction can be configured towards the water surface or the ground of the basin depending on the design.

Delivery state

  • Vertical mixers with motor plate
  • Propeller blades packed individually, installation on-site
  • Operating and maintenance manual

Installation and operating instructions


Article Number 6074816
Edition 2019-02
Page format 209.9 x 297.0 mm
Number of pages 44
PDF (5 MB)

General overview (Documents)

General overview 2019 International version

Article Number 2200591
Edition 2018
Page format 209.9 x 297.0 mm
Number of pages 74
PDF (40 MB)

General overview 2021 International version

Article Number
Edition 2020
Page format 209.9 x 297.0 mm
Number of pages 74
PDF (10 MB)

Certification booklet


Article Number 6090988
Edition 2020-10
Page format 209.9 x 297.0 mm
Number of pages 12
PDF (5 MB)

Brochure (Documents)

Biological treatment with efficiency.

Article Number
Page format 209.9 x 297.0 mm
Number of pages 20
PDF (12 MB)

Wilo Submersible Mixers

Article Number
Page format 209.9 x 297.0 mm
Number of pages 20
PDF (2 MB)

Certificate REACH (Documents)

REACH regulation

Edition 2020-08
Page format 209.9 x 297.0 mm
Number of pages 2
PDF (158 KB)