About the HEPA Filters
The High Efficiency Particulate Air (HEPA) filter is one of the essential components of a clean air cabinet.
It is the shield, which stands between the product and the environment.
The HEPA filter consists of a continuous sheet of glass fibers pleated and mounted in a rigid frame. It is
very delicate and the filter media should
never
be touched.
Proven efficiency in all HEPA filters used in Baker cabinets are 99.99% for particles 0.3 microns in
diameter. The 0.3 micron particle is used as the basis for filter definition because theoretical studies have
shown that filtration efficiency should be at a minimum for particles of this diameter, with efficiency
increasing for particles either larger or smaller. Experiments with various viruses and microbial agents have
proven the effectiveness of HEPA filters. (Contact The Baker Company for more information).
It must be pointed out that the HEPA filter is
not
intended to filter gasses or vapors, nor are they 100%
efficient on particulates.
The room and cabinet particulate levels along with the capacity of the building exhaust fan determines the
life of a filter. Under most laboratory conditions, you should expect a long filter life. However, misuse or a
heavy particulate load within the cabinet will shorten any filter's life.
Reminders
After many years of seeing our equipment used and misused, we have made up this list of suggestions:
•
Store equipment and supplies outside of the cabinet.
•
Always leave the building exhaust fan on.
•
Keep the work chamber viewscreen closed and latches locked.
•
Avoid using an open flame within the cabinet unless it has been specifically approved by a safety
professional.
•
Always keep the air grilles clear and unobstructed.
•
Toxic, explosive or flammable substances should not be used in the ChemoSHIELD
®
.
•
Don’t operate the cabinet above the recommended manufacturer exhaust flow rate.
351D700 Rev G
12
Summary of Contents for ChemoSHIELD CS500
Page 17: ...Appendix 351D700 Rev G 13...
