Labconco Purifie Horizontal Clean Benches 36125 Series - Manual (Page 28)

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Chapter 4: Theory Of Operation And Safety Precautions
HEPA Filters
HEPA filters are disposable, dry-type particulate filters.
The filter material or media is typically made of
borosilicate microfibers that are made into a thin sheet,
in a process similar to the production of paper. This
sheet is folded, or pleated to increase its surface area.
The pleats are held in place by aluminum diffusers or
by beads of glue that add rigidity to the media pack.
The media pack is then set into a suitable frame, and the
perimeter sealed to the filter frame, as shown in Figure
4-1.
The HEPA filter media is very fragile.
Do not touch or contact the media
surface. If you think the surface of a
HEPA filter is damaged, DO NOT
USE THE BENCH. Have the HEPA
filter integrity tested by a qualified
certifier before using the cabinet.
HEPA Filters are only effective
against particulate material. Gases
will pass through the filter.
!