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Wilo-Sevio ELASTOX-S | Wilo
Your advantages
Wilo-Sevio ELASTOX-S

Your advantages

  • Maximum possible energy efficiency through micro-perforation and large membrane surface area
  • High degree of system efficiency through increased dwell time of oxygen owing to installation close to the floor
  • High process reliability through low-wearing and clogging-free membrane and integrated non-return valve
  • High operational reliability thanks to division into small aeration fields
  • High flexibility in the plant control system through the air intake’s large control range

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Series description
Wilo-Sevio ELASTOX-S


Aeration system consisting of strip diffuser and pipeline system to distribute compressed air. On-site downspout or air intake pipe can be connected directly to pipeline system.


For fine bubble aeration of various fluids such as wastewater and sewage or sludge, for the purpose of supplying oxygen and mixing.


Compressed air generators input air into the pipeline system via the air intake pipe. The pipeline system evenly distributes the supplied air to individual diffusers. Air is evenly input to the fluid free from coalescence via a sewage-resistant membrane.



Technical data

  • Nominal diameter 180 mm
  • Nominal length 1500/2000/2500/3000/3500 mm
  • Size 180/A, also 4000 mm
  • Perforation area 2400/3200/4000/4800/5600/6400 cm2
  • Max. weight 5.00/6.50/8.00/10.00/11.50/13.00 kg
  • Air load, min.up to 2.0 m length 2.0 Nm³/h from 2.5 m length upwards +1.0 Nm³/h*m
  • Air load, nominal 19 Nm³/h*m
  • Air load, max. 19 Nm³/h*m
  • Air load, max. (for short periods) 19 Nm³/h*m
  • Air intake min. temperature 5 °C
  • Air intake max. temperature 60 °C
  • Min. fluid temperature 5 °C
  • Max. fluid temperature 35 °C



  • PUR

Membrane attachment

  • PP/PVC, glued (silicone)

Support element

  • PVC

Pipe system

  • Square pipe: Stainless steel
  • Round pipe: Stainless steel or plastic
  • Fixation: Stainless steel and plastic
  • Gasket: Flat gasket made of NBR


The aeration system is composed of one or more aeration fields. An aeration field consists of several components.

The strip diffuser consists of a supporting strip with a strip membrane placed over it. The strip membrane is fastened to the supporting rail with two fixing caps.

An integrated non-return valve prevents fluid from entering the pipeline system when the membrane is relaxed. As a result of the membrane’s excellent resilience, its perforation remains sealed when the membrane is not loaded.

It is fixed close to the basin floor via a fastening plate made of plastic.

The energy-efficient pipeline system guarantees ideal air distribution with low levels of pressure loss. It is detachable, height-adjustable and adapted to the characteristics of the basin and other plant technology.

Scope of delivery

  • Downspout connection
  • Main distribution line
  • Diffuser line
  • End distribution line
  • Drainage pipe connection
  • Membrane diffuser
  • Fastening for pipe system
  • Overview and layout

Installation and operating instructions

Wilo-Sevio ELASTOX-S

Edition 2018-10
Page format 209.9 x 297.0 mm
Number of pages 44
PDF (3 MB)

General overview

General Overview 2022 - International version

Edition 2022
Page format 209.9 x 297.0 mm
Number of pages 78
PDF (38 MB)


Biological treatment with efficiency.

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

Certificate REACH

REACH Regulation

Edition 2021-05
Page format 209.9 x 297.0 mm
Number of pages 4
PDF (212 KB)


Product overview Wilo-Sevio ELASTOX - 01/2021 - 50 Hz

Page format 209.9 x 297.0 mm
Number of pages 4
PDF (959 KB)