Closed Active RAB System

The Closed Active RAB is one of the alternate barriers available to separate operators from the product with the main aim of preventing product contamination.

The airflow arrangement for the cRAB's is a positive pressure "recirculatory" air flow system, powered by a suitably sized fan mounted in the overhead plenum. The air is forced into the Barrier via HEPA filters, providing unidirectional laminar air flow over the Critical Zone.

After air has passed over the Critical Zone it is filtered before being recirculated back to fan in the overhead plenum.