Labconco Biological Safety Cabinets 34608 Series - Manual (Page 20)

Chapter 4: Performance Features and Safety Precautions
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Note: The HEPA filter media is very fragile. DO NOT touch the media. If
you think the media of a HEPA filter is damaged, DO NOT USE THE
CABINET. Have the HEPA filter integrity tested by a certifier before using
the cabinet.
Note: HEPA Filters are only effective against particulate material. Gases
will pass through the filter.
Filter frame
Polyurethane seal
Between media pack
and filter frame
Filter media pack –
A continuous sheet
of filter media
ULPA Filters
Optional ULPA filters may be used to replace the standard HEPA filters in
the Purifier Logic Series Biosafety Cabinets. ULPA filters have the same
properties as described above except they are rated at least 99.999% efficient
in removing particles 0.1-0.2 or 0.2-0.3 micron.
Figure 4-1