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HUBER Multi-Rake Bar Screen RakeMax® Reliable, sturdy travelling screen

  • Very high screenings discharge capacity
  • Low headloss
  • Low installation height above ground level even in deep channels
  • Control-independent safety system

The HUBER Multi-Rake Bar Screen RakeMax® is perfectly suited to serve both municipal or industrial wastewater, and process water screening. The cleaning elements, attached to the chain system, can easily be adjusted to different requirements.

As the cleaning elements can be variably adapted, the screenings removal capacity is then adjustable. This is especially favourable for high solids loads. The cleaning elements, consisting of the rake and comb plate, are screwed and thus independently replaceable.

Due to its different design options the RakeMax® covers a very wide range of applications, allowing us to respond to the individual needs of our customers and to specific constructional and hydraulic site conditions.

Parallel installation of three HUBER Multi-Rake Bar Screen RakeMax® at a municipal WWTP
Parallel installation of three HUBER Multi-Rake Bar Screen RakeMax® at a municipal wastewater treatment plant
HUBER Multi-Rake Bar Screen RakeMax®
HUBER Multi-Rake Bar Screen RakeMax® with HUBER Detection System Safety Vision.
Two HUBER Multi-Rake Bar Screen RakeMax® units equipped with the HUBER Dectection System Safety Vision.
Two HUBER Multi-Rake Bar Screen RakeMax® units equipped with the HUBER Detection System Safety Vision. By detecting critical screenings, Safety Vision prevents damage to the screen and downstream machinery.
HUBER Multi-Rake Bar Screen RakeMax® in outdoor installation.
HUBER Multi-Rake Bar Screen RakeMax® with HUBER Detection System Safety Vision.
HUBER Multi-Rake Bar Screen RakeMax® completely closed.
Innovative and safe to operate: Three installed HUBER RakeMax® rotary rakes equipped with HUBER Safety Vision detection system.
Three HUBER Multi-Rake Bar Screens RakeMax® equipped with Safety Vision.
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Design sketch: Schematic drawing of the HUBER Multi-Rake Bar Screen RakeMax®
Design sketch: HUBER Multi-Rake Bar Screen RakeMax®

Function of the HUBER Multi-Rake Bar Screen RakeMax®

Design sketch: Schematic drawing of the HUBER Multi-Rake Bar Screen RakeMax®
Design sketch: HUBER Multi-Rake Bar Screen RakeMax®

Due to the specific design of the RakeMax® screen its height above floor is very low and, even in case of deep channels, only dependent on the installation height of the downstream screenings transport or washing system.

Both ends of the cleaning elements are connected to drive chains. Each chain is driven by a sprocket on a common shaft and a flange mounted gear motor. Furthermore, defined meshing of the cleaning rakes with the bar rack ensures high operating reliability.

An electro-mechanical overload protection system (spring assembly with deflection monitoring) reliably ensures that the process is interrupted when the preset overload is reached, or in case of a blockage.

Model Variants and Options

RakeMax® J

The RakeMax® J screen is a modified version of the proven HUBER RakeMax® screen. In contrast to the standard RakeMax® design version, the RakeMax® J screen does not have straight bars, the screen bars are bent in the bottom section, i.e. curved towards the sewer base. It is also this special form of the screen bars which gives the screen its name as the letter ‚J‘ has approximately the same shape as the curved screen bars. The screen rake moves along the curvature of the screen bars and describes a segment of a circle in this section. The flat inclination angle of the screen bars in the sewer base section increases the cross-sectional flow area of the screen with the result of reduced hydraulic losses and a reduced flow velocity in the gaps between the screen bars.

RakeMax® HF

The RakeMax® HF excellently combines the advantages of the well-proven RakeMax® with the positive properties of a screen with a bar rack that is installed with only a small inclination. The RakeMax® HF has a L-shaped design with two different screen sections: The flat bottom section provides a large screening surface and favourable hydraulic conditions, the steep conveying section ensures screening on a small footprint. Due to the extremely flat installation of the bar rack of 30° the screen section through which the flow passes is always double the depth of the approaching flow. Material removal from the screen starts virtually right at the bar rack mounted flat to the channel bottom so that any accumulation of disturbing material is eliminated. The optimal approaching flow conditions and large effective bar rack surface ensure a high hydraulic throughput capacity.

Safety Vision

The innovative HUBER Detection System Safety Vision enables the screen to "see" the screenings and reliably identify potentially critical contaminants. This effective protection mechanism reliably prevents damage to the screen or the downstream equipment, which not only increases the availability of the machines involved, but also improves the operational safety of the entire plant technology. In addition, the adaptive operation based on event detection means that the machine can always be optimally utilised and the running time of downstream machines can be optimised according to the actually necessary demand.

The benefits of the HUBER Multi-Rake Bar Screen RakeMax®

  • Very low headloss – high separation efficiency
  • Defined meshing of the cleaning rakes with the bar rack ensures a high operating reliability.
  • Screen installation possible without a bottom step
  • Compact design with a low installation height above ground level
  • Completely odour-encased screen with easy to remove covers
  • Easy-to-retro fit into existing channels, installation without channel recesses possible
  • The screen consists of a self-supporting folded stainless steel profile so that it can easily be lifted out of the channel.
  • Not hindered by gravel or grit
  • Simple and easy-to-access chain tensioning unit
  • All parts in contact with medium (except the chain, pinion, drive and bearing) are made of immersion pickled stainless steel, optional stainless steel chains and chain wheels.
  • High screenings discharge capacity through adjustable cleaning elements
  • Independently replaceable rake and comb plates
  • Automatic scraper mechanism, no service water required

Media

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FAQ

Frequently Asked Questions

This requirement can only be met by a screen that covers the full range of screen opening widths from fine to coarse screens.

In addition, the screen bars must be designed with the respective geometry to meet the corresponding requirement.

A typical screen that fulfills all these requirements is our HUBER Multi-Rake Bar Screen RakeMax®

Machines with a steep installation angle are best suited for such applications.

This screen installation option allows the installation space to be very compact, especially in the direction of flow.

Typical examples are our HUBER Multi-Rake Bar Screens RakeMax® and RakeMax® CF as well as the HUBER Belt Screen EscaMax®, HUBER Coarse Screen TrashMax® and HUBER Grab Screen TrashLift.

The best possible screenings discharge capacity is achieved with screens that have several rakes. The number of rakes can be adjusted to suit the conditions.

In addition, screenings discharge capacity can also be influenced via the discharge speed, e.g. through drives controlled by frequency converters.

 

Case Studies

HUBER Solutions in Operation

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2023-02-22 Madrid-Butarque, Spain

Up to 400 million litre capacity: HUBER successfully commissions 18 RakeMax® screens in the Madrid-Butarque stormwater retention basin

It is a successful large-scale project at the gates of the Spanish capital: HUBER successfully commissions 18 HUBER...

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2022-09-12

HUBER expands activities in the field of water extraction: clean water through innovative system solutions for seawater and river water extraction

Increasing population density as well as developments in industrial, commercial and agricultural sectors pose ever...

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img-casestudy-22-02-erfolgsgeschichte-01
2022-02-27 Berching, Germany

The HUBER Multi-Rake Bar Screen RakeMax® – a success story with more than 3000 installed machines

At HUBER SE, the 3,000th RakeMax® screen has left the factory at the company’s headquarters in Berching. In the course...

Continue reading
img-casestudy-21-07-innovation-safetyvision-01
2021-07-16

Unique innovation from the market leader: HUBER Detection System Safety Vision

The innovative HUBER Detection System Safety Vision enables the screen to "see" the screenings and reliably identify...

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2018-05-03

HUBER Safety Vision increases the availability of machines

An innovative building block for your digitisation strategy: The impurity detection system HUBER Safety Vision it is...

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img-casestudy-17-11-linz-asten-01
2017-11-13 Linz-Asten, Austria

Refurbishment project: regional STP Linz-Asten

On the largest sewage treatment plant in Upper Austria with a design size of 950,000 PE, the coarse screens were...

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img-casestudy-17-07-maer-lane-04
2017-07-25 Devon, England

Improvement of the Maer Lane STW Inlet Works

HUBER Technology recently completed and commissioned a large project for South West Water to improve the inlet works...

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img-casestudy-17-04-rakemax-guelph-teaser
2017-04-05 Guelph, Canada

Flawless operation and longevity make the RakeMax® Multiple Rake Screen invaluable to Guelph’s Screening Process

“Nothing slips by the RakeMax®. Its operation is absolutely flawless. After three years, we look at the components in...

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img-casestudy-2016-06-vienna-01-coarse-screen
2016-05-02 Vienna,
Austria

Major order: 12 HUBER Multi-Rake Bar Screens RakeMax® for Vienna

Extensive modernisation of the Vienna wastewater screening plant: six HUBER Multi-Rake Bar Screen RakeMax® units with 8...

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img-castestudy-2015-12-meadowhead-casestudy-01
2015-12-04 Meadowhead,
UK

Meadowhead STW Wastewater Case Study

HUBER Technology UK has completed the upgrade of the inlet works at Meadowhead STW. The project involved the...

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img-casestudy-2015-01-berlin-wassmannsdorf-01
2015-01-22 Waßmannsdorf-Berlin, Germany

HUBER supplies the equipment for a major sewage treatment works in Berlin

The wastewater in Germany’s capital Berlin is cleaned by a total of 6 large sewage treatment plants. One of them...

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img-casestudy-14-11-belfast-project-01
2014-11-20 Belfast, Northern Ireland

Huber Technology upgrades the Inlet works at Duncrue Street, Belfast - a Wastewater case Study

Huber Technology successfully completed a large £1.2 million project at Duncrue Street, Belfast. The project consisted...

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img-casestudy-2012-10-rakemax-magdeburg-01
2012-10-15 Magdeburg, Germany

Three HUBER RakeMax® screens for STW Magdeburg / Gerwisch

When the sewage treatment works in Magdeburg was planned 15 years ago for the installation of three fine screens,...

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img-casestudy-11-10-atotonilco-01
2011-10-25 Tula Valley of Hidalgo, Mexico

HUBER supplies the machines for the mechanical treatment stage of the worlds’ largest wastewater treatment plant project

The largest sewage treatment plant under construction in the world lies in the Mexican Tula Valley of Hidalgo. HUBER SE...

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img-casestudy-07-09-dublin-bar-screens-washpress-01-rakemax
2007-09-04 Dublin, Ireland

Great HUBER Bar Screens and Wash-Presses in Dublin

HUBER Technology UK was chosen as supplier of seven bar screens and seven screenings wash-presses for the Dublin Bay...

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News

Related News

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2022-03-22

The HUBER Multi-Rake Bar Screen RakeMax® – a success story with more than 3000 installed machines

At HUBER SE, the 3,000th RakeMax® screen has left the factory at the company’s headquarters in Berching. In the course...

Continue reading
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