Chapter 5: Using Your Filtered Enclosure and Appropriate Application
user continues to operate the enclosure with any of the following conditions present a potentially hazardous condition will exist:
1.The inlet concentration of vapors is greater than the TWA.
2.The carbon filter becomes saturated.
3.The ventilation of the room is insufficient to dilute the exhaust of the enclosure to below the TWA for the chemical.
When the inlet concentration is greater than the TWA, extra measures must be taken to monitor the filter and number of room air exchanges.
Chemical Carcinogen Use with
Odor Control Carbon Filters
Selected carcinogens may be used safely with Odor Control carbon filters under the following restrictions.
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The use of a vented fume hood or ventilated enclosure with ducting to the outside is always the preferred method when working with carcinogens. The Odor Control carbon filters should only be used, as a last resort when venting to the outside is not an option. Another option is the use of the XPert Filtered Balance Station, which uses a remote blower.
The potential carcinogens are listed in the NIOSH Pocket Guide to Chemical Hazards as “Ca.” Each potential carcinogen must have a TWA of 1 or greater; have minimum respirator recommendation of Escape GMFOV, and an odor threshold significantly lower than the TWA for the chemical.
The inlet concentration or the evaporation rate of the chemical must never exceed the TWA for the chemical.
Consult a Labconco Technical Specialist for estimated saturation life. See Chapter 6 for an example of estimating saturation life. Another source is the Labconco chemical guide for carbon filtered enclosures.
Prohibited Acid Use
The XPert Filtered Balance System motorized impeller cannot be exposed to acids. Where applications require the use of acids, a
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