Labconco Protector 3930000 User Manual page 36

Chapter 5: Appropriate Applications for Your Enclosure
Saturation Level or Time – There is a limit to the amount of chemical that
can be adsorbed by activated carbon or neutralized by chemically-treated
carbon. Once the capacity of the carbon is reached, it is considered to be
saturated and will adsorb (or neutralize) no further material; the outlet
concentration of the chemical will equal the inlet concentration from that
point until the filter is replaced. (Note that the capacity of activated carbon
is not a constant, but varies with the inlet concentration). Labconco
Product Specialists can determine the estimated saturation time for a
particular chemical.
IDLH (Immediately Dangerous to Life and Health). An atmosphere that
poses an immediate hazard to life or produces immediate irreversible
health effects. IDLH concentrations should not be approached in the
enclosure.
Appropriate Chemicals for Carbon Filters
Below is a general set of rules to determine appropriateness of chemical
usage.
Selected organic chemicals considered to be
occupational carcinogens by NIOSH can be used in the
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filtered enclosure with carbon filters under rigid
restrictions. See separate discussion on next page on
carcinogens for special instructions.
Organics must have time weighted exposure limits (TWA) of 1 PPM or
greater.
Chemicals must have a detectable odor at concentrations below the TWA
for the chemical.
Chemicals must be designated by NIOSH guidelines as acceptable for
use with chemical cartridge-type respirators (the exception is
formaldehyde and ammonia/amines, which used impregnated carbon).
Chemicals not listed by NIOSH in the Pocket Guide must be approved by
Labconco Product Specialist (or Engineering).
Inlet concentration must never exceed the IDLH (Immediately Dangerous
to Life and Health) concentrations.
Chemicals having a recommendation by NIOSH of at least "Escape
GMFOV" (Gas Mask Full-Face Respirator).
When evaporating a mixture of chemicals, the chemical having the lowest
TWA will be used to determine if the mixture meets the guidelines.
Call a Labconco Product Specialist at 1-800-821-5525 for assistance in
determining chemical appropriateness.
32 Product Service 1-800-522-7658