Extensive practical experience with the HUBER Multi-Rake Bar Screen RakeMax® Hybrid

HUBER Multi-Rake Bar Screen RakeMax® Hybrid with tear drop shaped screen bars – the well-proven, flow-optimising bar design

A new standard for the reqirements of wastewater treatment!

Innovative materials and technologies ensure the HUBER RakeMax® Hybrid is ahead of the future requirements in wastewater treatment.

The HUBER Multi-Rake Bar Screen RakeMax® Hybrid was presented to the public for the first time at IFAT 2016. The "Hybrid" design means that we use highly wear-resistant, glass-fibre reinforced screen bars in combination with a cleaning rake made of polyamide. All frame parts of this optional version are manufactured from stainless steel like on standard design versions.

The special feature of this type of screen is a bar rack that is manufactured from highly wear-resistant fibre-plastic composite which is manufactured in a special pultrusion process and, of a similar make, has proven its reliability in the field of aerospace engineering for many years already. By adding materials like glass fibre or resins for example the profile bars are made suitable for applications with high mechanical loads and excel for their very high stability, deformation resistance and resistance to wear.

Exhibit at IFAT 2016: HUBER Multi-Rake Bar Screen RakeMax® Hybrid, 3.2 m width
HUBER Multi-Rake Bar Screen RakeMax® Hybrid, 3 mm bar spacing, on WWTW Vienna in the outlet of the grit trap

Due to their high breaking elongation and elastic energy absorption the profiles retain their shape even under mechanical load, are highly flexible and return to their original shape. They also excel with a very high production precision, size accuracy and form stability so that even smaller bar spacings can reliably be maintained.

Another advantage of the RakeMax® Hybrid screen are the individually replaceable screen bars for quick and safe handling without the need for welding work.

Another crucial functional element of a screening system is the profile of the screen bars. To prevent jamming of solids, especially with small bar spacings, and ensure the reliable removal of screenings, the bar rack of the RakeMax®-J is of course also available with the well-proven tear-drop shaped bar profile. The characteristic feature of this profile is a very low headloss. As a result, hydraulic throughput capacity increases compared to conventional flat steel profile or trapezoidal profile bars. This bar shape furthermore prevents jamming of solid material, such as gravel.

The RakeMax® Hybrid screen has proven its functional capability in daily operation and over long operating hours on several sewage treatment plants in Germany and abroad. The RakeMax® Hybrid offers several features which make the screen what is understood as a "modern" technology today.

Yet for all the enthusiasm for the technology, there is one aspect that must not be forgotten: user-friendliness. But also in this respect, it shows impressively how modern machines can be created by adapting individual solutions to the standard and using innovative machine technologies.

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Products in use and related solutions

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