Tube Air Diffusers


High efficiency without the need for maintenance.

Esmil Tube Air Diffusers APKV represent high efficiency without the need for maintenance. A distinctive feature of the APKV Tube Air Diffusers is their high reliability and low operating costs over a wide range of supply air flows.

Tube Air Diffusers APKV are designed for continuous aeration when minimum maintenance and maximum service life are required. The time-tested design of the air diffusers has established itself as one of the most efficient and reliable technological solutions for biological wastewater treatment.

Advantages of Esmil Tube Air Diffusers:

  • Robust design and reliable operation with no need for regular cleaning;
  • Resistant to supply air impurities;
  • Uniform air distribution over the entire area of the aeration tank;
  • Low-pressure losses resulting in reduced operating costs;
  • Resistant to a wide range of challenging environmental conditions;
  • Fast installation and start-up;
  • Production control at every stage of equipment manufacturing.

Standard Oxygen Transfer Efficiency (SOTE)

Standard Oxygen Transfer Efficiency (SOTE)

APKV Diffusers: Pressure Loss

APKV Diffusers: Pressure Loss

Operating principle of Tube Air Diffusers:

Tube Air Diffuser APKV consists of two pipes inserted into one another with an air gap between them. The outer pipe is called a disperser and is produced from LDPE by the pneumatic extrusion process. This results in a pipe material consisting of numerous interconnected pores through which air flows. The inner pipe is made of PVC and is perforated. The gap between two pipes is divided with cross-ring inserts providing uniform air supply throughout the diffuser.

Construction of Ekoton Tube Air Diffuser

1 – Perforated pipe, PVC
2 – Fibro-porous disperser, LDPE
3 – Cross ring insertion, LDPE

The supply air enters the space between the inner and outer pipes through the openings in the inner pipe. The air is then evenly dispersed into the aerated liquid through the “fibro-porous” outer pipe forming numerous and consistent fine bubbles. This ensures consistent and uniform air distribution in the aerated liquid and provides superior aeration efficiency with minimal energy cost.

Threaded diffuser joints are fixed at both ends of the diffuser featuring simple installation in branches.



Technical characteristics of Esmil Tube Air Diffusers

Air flow range5-45 Nm3 / (h * m)
Design air flow8-25 Nm3 / (h * m)
Diffuser diameter0.12 m
Diffuser length1-2 m
Bubble diameter2-3 mm
SSOTE (at design air flow)5.4-6.0 %/m
Pressure loss (at design air flow)1.64–2.96 kPa

How often should the staff carry out maintenance work to clean, wash or replace diffusers?

Tube Air Diffusers manufactured by Esmil are highly efficient and do not require cleaning, washing, replacement and other service work that is inevitable when using other types of air diffusers.

What makes Esmil Tube Air Diffusers APKV installation procedure special?

Because of the threaded coupling design, tube air diffusers APKV are assembled into branches up to 20 m long which are then connected to an air manifold via threaded branch adapters. This unique design requires less piping, no field welding and is quick and simple to install.

What is service life of Esmil Tube Air Diffusers APKV?

Clog-resistant design of tube air diffusers APKV results in their long low-maintenance service life that lasts for up to 8–12 years based on the experience of our clients.

What does the standard delivery set include?

Standard set of equipment includes:
  • Diffusers;
  • Adjustable diffuser supports from hdgs;
  • End caps;
  • Air manifolds from AISI 304 with supports and factory-welded branch adapters.
The following options are available on request:
  • Drop leg included in the scope of supply,
  • Non-adjustable diffuser supports,
  • Metal parts of the aeration system are made from other types of steel.

Esmil Group

Esmil Group stands as a premier global manufacturer, crafting cutting-edge equipment for wastewater treatment and sludge dewatering. Additionally, we specialize in delivering advanced membrane systems tailored to various industries.

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Equipment for Wastewater Treatment & Sludge Dewatering.

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Equipment for Sludge Dewatering in the USA.

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Membrane Systems.