The loaded airflow enters the ZSA tangentially at the head. This creates a swirling flow (vortex sink). Due to centrifugal forces, the solid or liquid components are carried outwards to the wall, where they are separated and slide spirally into a container. In the lower part of the housing, the flow reverses and flows upwards through the immersion tube with a high circumferential component (cyclone vortex).
The ZSA series is typically used when low pressure losses and smaller material quantities of up to 50 kg/h are required.