Gentek 3940302, 3950 Suitable Applications, Hepa Filter Applications Suitability and Guidelines

Chapter 5: Using Your Filtered Enclosure and Appropriate Application

Shutdown

•Turn off the exhaust system and light.

Suitable Applications

NIOSH (National Institute for Occupational Safety and Health, USA) has established guidelines for chemical cartridge and HEPA filtered respirators. Suitable applications for the filtered enclosures are based on these guidelines. As with respirators, chemical contaminants are adsorbed or treated by carbon; particulates, powders and biohazardous materials are filtered by the HEPA filter before air is returned to the room. Biohazardous materials or other hazardous solids can be used with the HEPA filtered enclosure as long as appropriate decontamination occurs before filter changing operations. See Chapter 6 for decontamination procedures.

Listed below are suitable applications for HEPA filters and accessory Odor Control Carbon Filters.

HEPA Filter Applications,

Suitability and Guidelines

•Biohazardous materials and hazardous solids to protect only the operator and the surrounding environment.

•Weighing of powders.

•Release of particulates using a HEPA filter.

•Powder or particulate procedures traditionally performed on an open bench.

•The HEPA filtered enclosure provides personal and environmental protection from particulate matter, hazardous powders and biohazardous materials. Because room air is drawn through the enclosure during operation, this enclosure should not be used for operations requiring sample protection from environmental contamination.

•HEPA filters are only effective for entrapment of particulate matter, hazardous powders and biohazardous materials. Manipulations that generate gases or vapors, i.e., toxic chemicals or radionuclides, require the use of a HEPA and carbon filter in combination. Otherwise the enclosure should be ducted to the outside. The surface of the HEPA filter is fragile and should not be touched. Care must be taken to avoid puncturing the HEPA filter during installation. If you suspect that a HEPA filter has been damaged, DO NOT use the enclosure. See Chapter 6 for Replacing the HEPA Filter or using a Bag-In/Bag-Out Disposal Bag.

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