KLEEMANN Screening

The right screen media for optimal results

Screen media face tough challenges in the course of their daily work. In order to ensure constant and reliable screening of the desired material, genuine KLEEMANN screen media must fulfil particularly stringent quality requirements.

Recommended use

The screening result itself is determined by numerous factors. The most important of these are the shape of the particles, the moisture content and the feed volume. KLEEMANN offers a wide range of screen media for the upper and lower decks of screening plants that can be fitted to assure the best final screening results in any specific application. The individual screen segments can be freely configured in all cases. Flexibility is the name of the game – for every screening application.

Screen media for screening units

FS-Grade ( Finger Screen)

SG-Grade (Slotted Grate)

PP-Grade (Punch Plate)

QM-Grade (Quad Mesh)

PM-Grade (Piano Mesh)

RM-Grade (Rectangle Mesh)

DM-Grade (Diamond Mesh)

TM-Grade (Triangle Mesh)

Determining factors for the choice of the right screen

Type of material: natural stone or recycling material
Grain shape: cubic or elongated
Desired final grain size: this determines the size of the mesh apertures of the screen deck
Moisture content: if the feed material is moist, the prevention of caking is essential
Screen angle: the steeper the screen angle, the larger the ratio of the mesh aperture to the desired particle size
To assure thorough classification and efficient operation with minimum wear, the ratio of the upper deck to the lower deck must not be greater than 4:1

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How to set the correct tension of screens

Determination of the ideal tension:

Tension the screen
Drop an object with a weight of 2 to 3 kg onto the screen: The tension is correctly set if the object bounces back. If the object does not bounce back, the tension is too low.

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Tips for the operation of screening plants with maximum efficiency

Selection of screen media under consideration of the determining factors for the choice of the right screen lining.
Screen angle: the steeper the screen angle, the larger the mesh aperture must be, as the material falls faster and lies on the deck for a shorter time. The use of a shallower screen angle is advisable for the achievement of a precise result.
Layer thickness: the speed of the feed conveyor has a bearing on the layer thickness. If the speed is too high, the layer on the screen deck will be higher. Since coarse material will then be accumulated, the screening result will be less precise and too fine material may get mixed in with the oversize grain.

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What to consider when screening fine material:

The mesh size you choose should not be too small, as this could lead to caking of fines and clogging of the screen lining.
The finer the wire, the less caking will occur and the higher the throughput will be. The screen lining is then more robust.
As their strong vibration prevents caking, plastic screens are also suitable for screening fine and moist materials. A coarser mesh on the upper deck is advisable for keeping the lower deck free of coarse material.

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Woven screen types

WOVEN SCREEN TYPES: Square mesh, woven from spring steel wire

Woven square mesh screens are made from wear-resistant and vibration-resistant spring steel wires. Special weaving techniques used in the production of the oscillating woven screens exploit the benefits of equal loading of the round wires at the intersections to achieve stable positioning of the wires and a regular mesh size.

Screen tensioning: Cross-tensioned and longitudinally-tensioned wires

Advantages

Suitable for all screening plants
Precise separation of different grain sizes
Suitable for screening almost all wet and dry materials
with the exception of viscous materials
High resistance to vibration
Consistent wire positioning until completely worn out

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WOVEN SCREEN TYPES: W-harp / long slot

W-HARPS are screens made from crimped, round cross-section longitudinal wires that run perpendicular to the screening plane and are interwoven with groups of three cross wires at certain intervals. The length of the slots is generally between 100 and 150 mm.

The consistent spacing of the cross wires ensures greater stability and better constancy of the mesh aperture than in the case of G-harps.

Screen tensioning: Longitudinally tensioned

Advantages

Suitable for all screening plants (longitudinally tensioned)
Increased screening throughput
Self-oscillation of longitudinal wires prevents clogging
Good self-cleaning effect

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WOVEN SCREEN TYPES: G-harp / piano wire

G-HARPS are screens made from smooth and thin longitudinal wires that form slots. The large surface area of the screen enables high throughput of materials. The freely positionable and adjustable interwoven cross members ensure stable seating on the crossbeams of the screen box.

Screen tensioning: Longitudinally tensioned

Advantages

Suitable for all screening plants (longitudinally tensioned)
Suitable for draining wet materials
For wet, viscous materials and sludges
Easy installation of the flexible cross members on the crossbeams of the screen box

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WOVEN SCREEN TYPES: S-harp / Diamond Flex

S-HARPS are mesh-like screens made from round cross-section longitudinal wires with continuous crimping in the screening plane. The freedom of the individual longitudinal wires to move back and forth generates natural oscillations that make the screen ‘elastic’ and enables the processing of feed materials that are difficult to screen.

Screen tensioning: Longitudinally tensioned

Advantages