Laminar downflow containment bench units operating with either a recirculation or single-pass airflow formats can be designed to suit smaller spaces or operations that do not require the size of a downflow booth system.
In a recirculation system, 100% of the air is extracted by a high-efficiency fan/drive system, whilst providing automatic fan volume control to overcome the pressure drop as the filter dust burden increases.
In the Single-Pass once-through system, 100% of the air supply is provided by a dedicated high-efficiency fan / filter system with pre-pad, fine dust and HEPA filters, providing a downflow of clean filtered air whilst pushing any respirable dust downward and away from the operator’s breathing zone.
A Varioflow system offers safety protection at level 2 in a high-performance and efficient way of utilising ejector technology.
The airflow direction for a horizontal flow unit depends on the process to be carried out in the unit, outward filtered airflow for product protection or inward airflow (Negative) through filters for containment and operator protection.