Datasheet

www.okinternational.com
11 of 11
Do I need to use a pre-filter?
A pre-filter is highly recommended as it prolongs the life of the more expensive HEPA filter.
Will your unit filter the chemicals from the supplied list?
If the chemical is in a particulate form, the HEPA filter will remove it efficiently to safe levels. If the chemical is
a gas, we recommend checking the chemical against a list of substances which have been tested for
absorption by activated carbon. This list provides an absorption efficiency guide for many common chemicals.
A specific answer is complex and may require the consultation of a chemist in this field and possibly field
testing.
How long do the filters last?
That is difficult to predict as we do not know how much of contamination is going into the filters or how many
hours and shift you work. As a general rule, our filters for solder applications last 6 to 12 months. Pre-filters
may have to be changed more frequently.
Are “used” filters hazardous waste?
That depends on the chemical composition of the captured pollutants. Filters from hand solder applications are
in general not considered hazardous, as most of the pollutants are organics and not toxic like lead. Spent
activated carbon can be hazardous as often used for the filtration of flammable substances. Follow your local
regulations for the disposal of filters.