Gyratory free swinging screen | Bruks Siwertell
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Gyratory free swinging screen

Gyratory free swinging screen

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Accurate separations set industry standards

Our industry-leading gyratory free-swinging screens are well known for their accurate, durable performance.

They are relied upon worldwide for their ability to separate wood-based materials such as chips, pellets, pin chips or sawdust, into two to four size categories.

Gyratory screening maximizes profits by ensuring the highest possible yields and are available in sizes ranging from 2.5 to 24m2. Our punched plate or wire mesh screen plates are easily accessed and changeable.

Bruks Gyratory free swinging screen

Benefits of good design

The screening motion for our gyratory free-swinging screens is generated by a motor-driven, rotating counterweight, delivering a high-capacity through-put. The bulk material is delivered via an inlet chute, which is designed to spread a load over the entire width of the screen and reduce material flow to an optimum level.

The system comprises a screen box, suspended by steel cables, which contains two or three screen decks with decreasing hole sizes. The top deck consists of perforated screen plates; other decks usually have wire mesh-type plates in place, which ensures superior separation of fines and pin-chips. High volumes and loads are accommodated by the integral strength of the plates and mesh.

For some units, the screen decks have a stepwise decreasing inclination, which leads to decreasing transport speeds. This design delivers an impressive combination of high capacities with highly accurate screening. Other units are specified for an ingenious control mechanism that makes it easy to vary the proportion of an accepted fraction in a load, or to discharge a separate fraction of processed material entirely.

All our screen decks are exchangeable and come with a variety of perforations adapted to individual requirements.

Optional flop gates in the discharge chute are also available. These optimize sawdust and pin chip separation.

free swinging screen

free swinging screen   free swinging screen

free swinging screen



Technical Data

Free swinging capacity

Type Trough bottom width (mm) LL - max Capacity m3/h (loose chips) M - max Capacity m3/h (loose chips) H - max Capacity m3/h (loose chips)
CV330 330 70 85 85
CV450 450 90 110 110
CV600 600 110 140 140
CV750 750 135 170 170
CV900 900 160 - 200
CV1200 1200 210 - -

Free-Swinging Chip Screen

Data SG5-3 SH5-4 SH8-3 SH11-3 SH11-4
Average capacity, m3/h 60 60 120 250 250
Momentary capacity, m3/h 100 100 200 300 300
Max capacity for separation of fines, m3/h 12 12 25 50 50
Screening area, m2 5 5 7,6 11 11
Electrical motor (kW) 4 4 5,5 7,5 7,5
Net weight, kg 1600 1800 3200 4000 4500
Screening fractions 3 4 3 3 4