Labconco Protector Filtered Glove Box - Manual (Page 39)

Chapter 5: Using Your Glove Box
Product Service 1-800-522-7658 35
point until the filter is replaced. (Note that the capacity of activated carbon is
not a constant, but varies with the inlet concentration). Labconco Technical
Specialists can determine with the computerized carbon-modeling program
the estimated time saturation for a particular chemical. When using a HEPA
or ULPA filter in all filtered glove boxes or in combination with a carbon
filter, the speed control will need to be increased to allow for filter loading.
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 glove box.
Appropriate Chemicals for Carbon Filters
Below is a general set of rules to determine appropriateness of chemical
usage. See Chapter 7 to attach and order an accessory FilterMate Portable
Exhauster equipped with carbon filters.
Selected organic chemicals considered to be occupational
carcinogens by NIOSH can be used in the filtered glove
box with carbon filters under rigid restrictions. See
separate discussion 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 use 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
chemical appropriateness and use of an accessory FilterMate Portable
Exhauster with your glove box.
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