Laminar Airflow - Labconco Logic+ 30348 Series User Manual

Type b2 biosafety cabinets

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4: Performance Features and Safety Precautions

Laminar Airflow

Laminar airflow is defined as the movement of a body of air in a single direction,

with a uniform velocity. In practice, the laminar downflow of air in the cabinet

captures any aerosol generated in the work area of the cabinet, and directs it to

the HEPA filters. In order to be true laminar downflow, a number of individual

downflow velocity test points (The Downflow Velocity Profile) must be +/- 16 feet

per minute (0.08 m/s) of the average of all the test points. This is shown in Figure

4-2.

Figure 4-2

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