ELASTOX® aeration systemsSystem components for every process technology and all kinds of plant layouts

ELASTOX® membrane air diffusers from GVA stand for high quality and stable performance in com¬pressed air aeration for over 20 years now. The design advantages and favorable properties under continuous operation quickly made the ELASTOX® system a widely copied plant component for waste water treatment: technology.

As a recognized specialist for fine-bubbling compressed air aeration systems, GVA not only delivers components and process know-how, but our business operations also include plant planning and consultation for plant operators all over the world.

High-quality membrane properties – essential to secure compressed air aeration.

The common term “rubber mem¬brane” in fact does not meet the complexity of the subject of material quality as it pertains to the efficiency and durability of compressed air aerations systems. In addition, a distinction must be made between municipal and industrial waste water facilities due to the different composition of the waste water.

ELASTOX® – membrane technologies that are always state-of-the-art

In municipal applications, elastomers made of EPDM (ethylene propylene diene terpolymer) have best stood the test of time. The material has been continuously optimized over the years and features high durability, excellent mechanical properties, and a high degree of overall cost effectiveness. Today we have various advanced EPDM qualities available to meet a wide range of requirements. However, in spite of its reduced plasticizer content, EPDM shows a certain susceptibility to certain substances contained in industrial waste water, and under certain conditions to some microorganisms as well.

Microbe-resistant EPDM-MB
In terms of the problem of the biological sedimentation, we are able to supply "microbe-resistant” EPDM, which has proven itself in many plants.

A very good alternative membrane material is silicone, which can be applied in particular in waste water treatment facilities in industries such as paper or food production, chemicals, etc. It offers good to very good resistance to oils and grease in waste water and to other "critical" substances as well. Thanks to its especially smooth surface, silicone is largely resistant to sedimentary deposits and encrustation, and thin layers of deposits can be easily removed. Furthermore, silicone is also suitable for applications in which the temperatures of both the waste water and admitted air are high.