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ePaper created 2013-10-02, 10:19:18 | version 1.25.20
99 2. or 3. 1. 2. or 3. 2. + 3. 1. 100 90 80 70 60 50 40 30 20 10 0 95 % 97 % >99,5 % 600 500 400 300 200 100 0 0,1 0,5 2,5 12,5 FumeExtraction Leadfree solder 310 °C Leadfree solder 340 °C Increasing soldering temperature causes higher pollutant concentration of small particles! Millionparticlesprom3 Particle size in µm 0,1 0,5 2,5 12,5 600 500 400 300 200 100 0 Filter class M 5 F 7 E 12 100 90 80 70 60 50 40 30 20 10 0 Medium filtration efficiency Em % against particle size 0,12 µm Filter drawings not true to original 1. 2. + 3. 2. or 3. 1. 2. or 3. Filter process Filter classes and recommended applications Pollution concentration 1. Fine dust filter For standard applications with a small amount of flux and polluti- on gases with high solid content, Weller® FT offers filter classes M 5 or F 7. 2. Compact filter consisting of: EPA filter Filter particles up to 0,3 µm. Weller® FT offers EPA (Efficiency Particulate Air) filters of class E 12, medium filtration efficiency 99,5%. Wide band gas filter Wide band gas filter For cleaning harmful fumes and vapours. The Weller® FT wide band gas filter consists of 50% active carbon and 50% Puratex. Harmful gases with a high molecular weight are cleaned by the active carbon. Puratex it suitable for absorbing gases of lower molecular weight. Because of its composition, Puratex is able to convert a large number of chemical pollutants by means of mole- cular modification into non-polluting gases. 3. Gas filter (option) The gas filter is used for extracting adhesive fumes and solvents. Experience has shown that filtering suspended particles is not so vital in this respect. The gas filter is filled with 50% active carbon and 50% Puratex. The EPA E 12 is omitted. WFE, WFE P WFE 2X Zero Smog 20T Zero Smog 4V Zero Smog 6V WFE 2ES