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Wilo-Sevio ELASTOX-P | Wilo
Your advantages
Wilo-Sevio ELASTOX-P

Your advantages

  • Increased operational reliability thanks to hoist restriction of the plate membrane to evenly expand the membrane for ideal air intake. Thanks to its special design the air intake reduces fluid penetrating the pipeline system when the membrane is not loaded
  • Specific airflow rate generates higher air intake
  • Low requirements for specific piping thanks to installation of plate diffusers in pairs
  • High quality and service life of the membranes thanks to manufacture as moulded product

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Series description
Wilo-Sevio ELASTOX-P


Aeration system consisting of plate 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 210 mm
  • Port-to-port length 750 mm
  • Perforation area 1200 cm2
  • Max. weight 1.82 kg
  • Air load, min. 3.0 Nm³/h*m
  • Air load, nominal 9.0 Nm³/h*m
  • Air load, max. 12 Nm³/h*m
  • Air load, max. (for short periods) 18 Nm³/h*m
  • Air intake min. temperature 5 °C
  • Air intake max. temperature 80 °C (optionally up to 120 °C)
  • Min. fluid temperature 5 °C
  • Max. fluid temperature 35 °C



  • EPDM, microbe-resistant EPDM or silicone

Membrane attachment

  • PP

Support element

  • 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 plate diffuser consists of an arched support plate with overlying plate membrane. The plate membrane is attached to the support plate using a fixation frame. A link along the structure in the fixation frame serves as the hoist restriction.

Thanks to the hoist restriction the membrane expands evenly, thus guaranteeing ideal air intake. Its special design reduces fluid penetration to the pipeline system when the membrane is not loaded. As a result of the membrane’s excellent resilience, its perforation remains sealed when the membrane is not loaded.

Plate diffusers are installed on the pipeline system in pairs using a tie rod and sealing washer. Square pipes are used for the pipeline system.

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-P

Edition 2018-09
Page format 209.9 x 297.0 mm
Number of pages 23
PDF (31 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)