The contaminated air flow in the form of oil mist/smoke enters the receiving chamber of the unit due to the vacuum created by the exhaust fan. In the receiving chamber, the air first encounters a baffle designed to evenly distribute the airflow and separate larger liquid droplets. The air then passes through a labyrinth filter where large droplets condensed from the mist are collected. After the labyrinth filter, the air flow passes through a pre-filter, where impurities such as fine chips and dust are trapped on the mesh along with liquid droplets.
The purified air flow, free from larger particulate contaminants, enters the main cleaning stage chamber. In this chamber, small liquid droplets are captured and coalesced using self-draining cassettes (or a bag filter). The contaminants held during the filtration process transition into the liquid phase and drain into an oil collector due to the force of gravity.
When using models of the unit without additional cleaning stages, the air is discharged from the unit into the ventilation network through the outlet opening. Upon request, the filter can be equipped with a HEPA filter. In this case, after the main cleaning stage, the air passes through an additional cleaning chamber where particularly fine particles of contaminants are trapped by a filtering cartridge. After the additional cleaning stage, the air can be directly discharged into the production area.