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84 SMT Magazine • March 2016 This article focuses on filtering separators, also known as bag filters and fibre filters, as they are used across a wide range of industrial sectors. The German association Verband Deutscher Maschinen- und Anlagenbau (VDMA)/Ger- man Engineering Federation) subdivides filter- ing separators into different classes (Figure 1). Thus, a distinction is made between fine par- ticulate (according to DIN EN 779:2012) and coarse particulate air filters (according to DIN EN 1822:2011). Particle size is critical for the selection of filter type. With a given air volume and filtra- tion efficiency, the following parameters are key fIltratIon tEChnology Figure 1: Classification of filters. Figure 2: Filter classes in accordance with particle sizes.

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