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68 SMT Magazine • August 2017 Differentiation and Legal Regulations Airborne pollutants are classified accord- ing to particle size. This classification is set pri- marily by the influence of the emissions on the human organism. Thus, airborne pollutants are not only differentiated, whether they are brain, nerve or airway damaging. A distinction is made, whether they are inhalable (I-fraction) or alveolar (A-fraction). Pollutants of the A-frac- tion overcome the so-called lung-blood barrier, which separates air-filled cavities of the pulmo- nary alveolus from blood in the capillaries. Therefore, the DIN EN 481 defines statu- tory limit values. According to technical rules for hazardous substances in various coun- tries, there are limit values and legal regula- tions that determine the utilization of extrac- tion and filtration technology to meet these regularities. Air Pollutants and Sustainable Filtration In order to eliminate developing air pol- lutants, it is not sufficient to provide for only good ventilation in the manufacturing envi- ronment. The use of efficient extraction and fil- tration technology is mandatory and required by the Employer' s Liability Insurance Associa- tion. The variety of the available extraction and filtration systems is high. The selection of the appropriate system depends on type and vol- ume of pollution, the use in automated, semi- automated or manual production environments and on mobility as well as flexibility. State of the art extraction and filtration units achieve such a high cleaning rate for the processing air that the cleaned air can even be re-circulated into the work area. Collecting the airborne pollutants is a sig- nificant aspect, when running extraction sys- tems for air purification. Close proximity to the source of emission is crucial—the closer, the better. Not only in terms of capturing all parti- cles before they reach ambient air and build up on plants and products, but also to minimise economic expenses. The larger the distance be- tween source of emission and collection ele- ment, the higher the necessary suction capaci- ty of the extraction and filtration system—with, in turn, a huge impact on energy consumption. Collection elements help to increase the ef- fectiveness of the extraction process. They are end fittings of extraction arms, which ensure an optimal absorption of the emissions. Depend- ing on the amount and type of the pollution, as well as the airflow principles, users can select from a great variety of designs. Even complete enclosures are available. Choosing the proper collecting element is decisive for the quality of the entire extrac- tion and filtration system. The level of pollut- ant coverage is the basis for a subsequent high- SOLDERING FUMES IN ELECTRONICS MANUFACTURING Figure 4: Mobile extraction and filtration unit for solder fumes for use at manual work places, JUMBO Filtertrolley 2.0 LRA.