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Wilo-Sevio ELASTOX-D 09 | Wilo
Your advantages
Wilo-Sevio ELASTOX-D09

Your advantages

  • High system efficiency owing to high aeration capacity
  • High flexibility in the plant control system through the air intake’s large control range
  • Maximum possible process-specific activation density by taking different basin geometries into account
  • Long service life in municipal and industrial applications thanks to different membrane materials
  • Low installation and conversion costs of existing pipework

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Series description
Wilo-Sevio ELASTOX-D 09


Aeration system consisting of disc diffuser and pipepipesystem to distribute compressed air. On-site downspout or air intake pipecan be connected directly to pipepipesystem.


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 pipepipesystem via the air intake pipe. The pipepipesystem 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 218 mm
  • Perforation area 370 cm2
  • Max. weight 0.70 kg
  • Air load, min. 1.5 Nm³/h
  • Air load, nominal 8.0 Nm³/h
  • Air load, max. 10 Nm³/h
  • Air load max. (for short periods) 10 Nm³/h
  • Air intake min. temperature 5 °C
  • Air intake max. temperature
    • 80 °C (EPDM)
    • 100 °C (silicone)
  • Min. fluid temperature 5 °C
  • Max. fluid temperature 35 °C



  • EPDM, EPDM with reduced softeners or silicone

Membrane attachment

  • PP

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 disc diffuser consists of a supporting plate with threaded connection, a plate and an RI. To prevent fluid entering the pipeline system, a non-return valve can be optionally installed. As a result of the membrane’s excellent resilience, its perforation remains sealed when the membrane is not loaded.

As standard, disc diffusers are installed on the pipeline system using a threaded connection (R¾) and rubber saddle on the round tube.

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-D 09

Edition 2016-06
Page format 209.9 x 297.0 mm
Number of pages 52
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)