AViTEQ screening technology

Bar sieve

The AViTEQ GRIZZLY bar screen belongs to the bar screen class and shows its strengths when conveying and prescreening coarse grain. The robust screen scores with a wide range of applications, high operational reliability and high throughput rates.

Up to 7.000mm length
Thanks to its flexible length, the bar rack sieve can be optimally adapted to different processes.
Up to 3.000mm width
With an adjustable width of up to 3,000 mm, bulk material can be reliably conveyed and screened.
Up to 1.500m³/h throughput
The high throughput rate ensures constant and efficient conveying.

At a glance

  • Wide range of applications: At the interface between the silo and downstream processing systems, the bar screen fulfills several tasks at once. It enables the controlled discharge of bulk material and at the same time pre-screens large grain sizes. The coarse material is then fed to the crusher, screener or conveyor belt.
  • Tapered bars: For the longest possible service life and best productivity, the bars of the bar rack have a tapered profile in the conveying direction. This reliably prevents the bulk material from becoming wedged in the grate.
  • High conveying capacity: The bar rack screen can be individually designed for a conveying capacity of up to 1,500 m³/h and thus ensures maximum efficiency and productivity for demanding conveying, screening and feeding tasks.

Robust, durable, versatile

The AViTEQ bar screen is designed for demanding conveying, screening and feeding tasks with heavy coarse grain. The design of the system therefore meets the highest requirements in terms of resistance, robustness and durability. Sturdy wear plates in the inlet area ensure mechanical protection of the bar screen, while elastic support elements reliably absorb the forces acting on them. Up to three bar screen stages with a tapered bar profile ensure efficient and reliable conveying. The bar screen has a wide range of applications:

  • Extracting bulk material from bunkers and silos
  • Conveying and screening of coarse grain
  • Separation of coarse grain before classifying screens
  • Separation of fines before crushers
  • Protection of conveyor belts by presetting fines

Stable and durable - the structure

The robust design of the AViTEQ bar screens is aimed at durability and low wear. The coarse-grained bulk material falls onto sturdy wear plates in the inlet area and is guided from there over either two or three bar grate stages. Depending on the desired screening effect, the rows of bars integrated in the grate can have variable spacing and ensure separation of fine and coarse particles. While the fine material falls through between the bars, the coarse material is conveyed further above the bars, for example to the crusher or classifying screen. The main components at a glance:

  • Conveyor with drive traverse
  • Bar grating inserts with tapered profile in the conveying direction
  • Powerful drive (unbalance motors / unbalance exciters)
  • Elastic support elements for force absorption

Customized bar screen for your application

The design and dimensioning of the AViTEQ GRIZZLY bar screen is tailored to your individual requirements. In addition to the type and size of the material to be conveyed, the throughput volume to be conveyed is also decisive - this can be up to 1,500 m³/h. The design and arrangement of the bar rack depends on the desired separation size. In addition, the space available at the installation site is also taken into account in the individual design of the bar screen.

Here is an overview of the most important parameters for dimensioning:

  • Conveyed goods (type and size)
  • Throughput quantity
  • Separation size
  • Required geometry
  • Possible installation dimensions


Bar screens in practical use

Get an idea of the wide range of applications for our tried-and-tested bar screens. The product images provide a practical insight into the applications and working environments of our screening machines.

Bar grate screen with unbalance exciter for crusher relief

Coarse separation of rock by bar screen

Bar grate screen with unbalance motors


Drive types for bar screens

The drive of the AViTEQ bar screens is designed for robustness, durability and high throughputs. Both alternatives - unbalance exciter and unbalance motor - meet this requirement in every respect and are predestined for use in vibratory conveyor technology.

AViTEQ unbalance exciter

Unbalance exciter

Find out more about our unbalance exciters here

AViTEQ unbalance motor

Unbalance motor

Find out more about our unbalance motors here


Expertise for your industry

With over 80 years of global experience, we at AViTEQ have specialized in the diverse requirements of different industries. Our comprehensive product range offers customized solutions to handle bulk materials efficiently and safely in various production processes - from bulk material handling to thermal treatment. Discover our wide range of machine solutions to help you meet your industry-specific requirements.


Glass production

Glass production

Glass recycling

Glass recycling

Food / Animal feed

Food / Animal feed<br>

Construction/ quarries/ pits

Construction/ quarries/ pits



Battery production/ recycling

Battery production/ recycling

Steel production

Steel production





Waste incineration/ slag

Waste incineration/ slag
Control screening icon

Protective and control screening

Discover all products in the "Protective and control screening" range.

Mockup downloads

Our download area

Our brochures and further information are available for download as PDF files. Operating instructions are available on request.


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