Pre-Filter
The pre-filter acts as the initial screening device for Hakko fume extractors. Relatively large particles are removed from the air stream by a polyester filter, similar to those used in home air conditioners. Hakko filters have an arsenate (the capability to collect particles from the air) of 83%. Proper use and maintenance of the pre-filter can extend the service life of the main filter, so it is very important that they be checked at least once a week to see if they need replacement.
HEPA Filter
The HEPA filter removes contaminants as small as 0.01 micron. This makes it ideal for removing irritating particles that contribute to allergies and asthma. The Hakko filter is made of a closely pleated sheets of waterproof, all-glass paper with aluminum "safe edge" separators. The filter is housed in an aluminum case. Frame joints, separators and the filter itself are sealed to the sides of the case with urethane for a completely leak-tight fit. The filter assembly is stable at temperatures up to 200°F. The filter used in the Hakko HJ3080 is rated by the DOP test at an efficiency of 98% for a particle size of 0.3 micron. The filter used in the Hakko HJ3100 is rated at an efficiency of 99.97% by the same criterion.
Activated Carbon Filter
An activated carbon filter complements the HEPA filter. Activated carbon absorbs nearly all organic and inorganic vapors passing through the filter. Its capacity to remove vapors varies with the concentration of gas in the air, humidity, temperature, and the velocity of the gas passing through the carbon. Efficiency remains constant
until the filter is depleted, meaning it has absorbed all the pollutants it can hold.
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