Airstream® Duo Class II Biosafety Cabinet

The Esco Airstream® Duo Class II biosafety cabinet is a double-fan/double-exhaust filter version of Esco's Airstream® S-Series Class II biosafety cabinet model. Providing operator, product and environment protection from hazardous aerosols through superior minipleat ULPA filters, the product combines the best product performance features with Esco's ergonomic design.

Product Highlights

• Unique Esco Dynamic Chamber™ plenum design delivers quiet, uniform airflow.
• Negative pressure plenum surrounds contaminated positive pressure plenum; no fabric bags are used.
• Dual, long-life ULPA filters for supply and exhaust airflow.
• >50% less energy consumption and heat output (AC2-E and AC2-S Series) than competing products delivers lower total cost of ownership.
• Esco Sentinel™ microprocessor supervises all cabinet functions.
• Ergonomically angled front improves reach and comfort.
• Actual work opening is 25.4 mm (1") larger than tested sash opening to provide additional work space.
• Frameless, shatterproof sash is easier to clean, offers larger, unobstructed viewing area.
• Removable one-piece work surface simplifies cleaning (applicable to AC2-S series and AC2-D series).
• E-Series cabinets include multi-piece tray components which lift and remove to provide easy access encourage surface decontamination and can be sterilized inside autoclave.
• Raised airflow grille maintains safety by preventing blockage.

Airflow Diagram

Ambient air is pulled through the perforations located towards the work zone front to prevent contamination of the work surface and work product. The inflow does not mix with the clean air within the cabinet work zone. Inflow air travels through a return path toward the common air plenum (blower plenum) at the top of the cabinet. Dual blowers and dual exhaust filters provide an added measure of protection. If the primary blower fails, the secondary blower still pushes the air across the exhaust filters to maintain inflow and containment.

Approximately 35% of the air in the common plenum is exhausted through the ULPA filter to the room. The remaining 65% of the air is passed through the downfl ow ULPA filter and into the work area as a vertical laminar flow air stream bathing the work surface in clean air. The uniform, non-turbulent air stream protects against cross contamination within and throughout the work area. Near the work surface, the downflow air stream splits with a portion moving toward the front air grille, and the remainder moving to the rear air grille. A small portion of the ULPA filtered downflow enters the intake perforations at the side capture zones at a higher velocity (small blue arrows). A combination of inflow and downflow air streams forms an air barrier that prevents contaminated room air from entering the work zone, and prevents work surface emissions from escaping the work zone. Air returns to the common air plenum where the 35% exhaust and 65% ULPA-filtered air recirculation process is continued.

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