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In recent years, BM/KCH 628 (BM=Burgess Manning, KCH=Koene Consultancy Holland) vertical flow vane
packs with hollow vanes were retrofitted as a replacement of mist mats in vertical wiremesh demisters
because it was not feasible to install a horizontal flow vane pack. Following positive experience with
these vane packs, they are now considered as equally acceptable