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August 2015 • SMT Magazine 73 REDuCING RISkS TO EMPLOYEES' HEALTH continues ArtICle Demand for particle capture at the point of origin makes sense, because: • Large quantities of pollutants can be captured • Relatively low capture efforts • Good filtration opportunities are given • Low energy consumption is possible Basically, the appropriate capturing element can deliver a substantial contribution to the quality of the extraction and filtration device. The degree of capture rate forms the basis for subsequent high-grade filtration, finally provid- ing high overall efficiency and low residue in the returned clean air. Additionally, the place of capturing plays a key role. A general rule says that twice the dis- tance between emission source and capturing element requires four times the exhaust per- formance in the extraction and filter system—a particularly noteworthy energy context in times of ever increasing energy costs. Extraction and filtration in industrial envi- ronments goes far beyond the vacuum cleaner principle. It is not just a case of dirt removal but to eliminate hazardous substances in the air that may cause more than a dust allergy. The precondition for users is knowledge about their materials and processes. Vendors of extraction and filtration technology propose a suitable system. They have expert knowledge concern- ing legal regulations and chemical and physical characteristics of the media to be extracted and filtered. They finally adapt a system for air puri- fication suitable to the operating conditions in a facility. SMT Stefan Meissner is in corporate communications at ulT ag. He may be reached by clicking here. figure 5: extraction arm for pollutant capturing at the work place.