When large quantities of material are to be separated, it is advisable to use a pre-separator. The pre-separator can be placed at the workplace or in conjunction with the central unit.

Pre-separators should be used:

– for material recovery
– for material transportation
– to reduce the loading on the ducting system
– to relieve loading on the central filter
– to reduce the risk for filter clogging
– when fluids are to be separated

When a pre-separator is to be used the following should be considered:

1. Type of dust to be handled.
2. How the unit should be placed and how emptying will be performed.
3. Expected airflow. 

Pree separators



1. Cyclone Principle meaning that the inlet is mounted tangentially on the body and the air-flow is thus forced against the inside of the cyclone. This principle is very effective in separating particles down to 1/100 mm.



2. Inertial Principle meaning that the air stream flows into the container and abruptly changes course. The oulet sits behind the inlet and the particles are thus thrown into the container.




Pre-separators can be used in all applications where the extracted material is coarse or voluminous. These can be placed in the actual workplace for separate handling or recovery of the extracted material, or centrally.

Pre-separators separate material from the air-flow using the action of a cyclone or with inertial separation. Inertial separators are generally configured as containers with the inlet and outlet in the same wall of the container. When the air-flow changes direction abruptly, separation occurs for the particles with higher relative mass. When pre-separation is used to accommodate higher material volumes it is also important to consider the type of material discharge to be used. Dustcontrol offers a range of different standard options including; screw compaction, airlocks or container collection.