Laminar Flow and Containment Equipment

Class II Type A2 Biological Safety Cabinet

A recirculating Class II cabinet that combines inward face airflow, HEPA-filtered vertical downflow and filtered exhaust for three-way protection.

Personnel Product and Environmental Protection
HEPA-Filtered Downflow
Negative-Pressure Contaminated Plenums
Recirculating A2 Airflow

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Product Introduction

The Type A2 cabinet draws room air inward at the front grille while HEPA-filtered downflow protects the work zone. A portion of the filtered air is recirculated and the balance is exhausted through a HEPA stage, either into the room or through an appropriate canopy connection. Contaminated plenums are maintained under negative pressure or surrounded by negative-pressure sections. The cabinet is selected and installed for biological particulate work; volatile chemical use requires a separately evaluated exhaust strategy.

Key Features

The front inflow grille captures room air before it crosses the work surface.

Vertical filtered downflow limits cross-contamination across the product zone.

Negative-pressure plenum design provides a fail-safe boundary around contaminated air paths.

A motorized or counterbalanced sash maintains the selected operating height.

Independent inflow and downflow sensing supports real-time airflow monitoring.

Customer Product Concerns

A Type A2 cabinet must balance operator capture and clean product downflow while keeping recirculated air paths safely enclosed.

Hands crossing the front grille disrupt containment.A properly sized grille and stable inflow maintain capture around normal arm movement.

Items block downflow and create cross-contamination zones.A wide supply diffuser and organized work layout preserve first-air paths.

Filter loading shifts the inflow/downflow balance.Separate airflow sensors and automatic blower control maintain the selected operating range.

The cabinet is used with unsuitable volatile chemicals.Application guidance distinguishes A2 biological particulate work from total-exhaust chemical handling.

Typical Applications

Cell cultureClinical microbiologyNon-volatile biological sample preparationSterile biological product handling

Technical Parameters

Typical configurable construction ranges for a Class II Type A2 biological safety cabinet are listed below.

Core Material	SUS304 single-piece work-zone liner with powder-coated steel outer shell and mineral-wool acoustic fan enclosure
Panel Thickness	30-60 mm double-wall cabinet and plenum sections
Effective Width	900-1800 mm clear working width
Maximum Length	Up to 2400 mm overall cabinet height
Steel Facing Thickness	1.0-1.5 mm SUS304 inner liner; 0.9-1.2 mm outer steel
Core Density	80-120 kg/m³ mineral-wool acoustic infill
Thermal Conductivity	0.035-0.045 W/(m·K) for the acoustic infill
Surface Finish	Fine-brushed SUS304 work zone with white epoxy-polyester outer coating
Joint Type	Welded inner liner with negative-pressure plenum joints and gasketed supply and exhaust HEPA frames
Customization	Available based on the intended application and operating environment.

Available Options

900-1800 mm work widthsRoom exhaust or canopy connectionMotorized sashSingle-piece or segmented work tray

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