Modern industrial processes have reached very high levels of sophistication and require compressed air systems characterised by higher air purity levels. Inadequate or low efficiency filtration can cause interruptions of service, high maintenance costs and loss of production. The PureTec - B filters have been designed specifically to prevent these problems, offering guaranteed and laboratory tested filtration efficiency, within a range of configurations studied to meet all requirements. The filters B are made up from a flanged carbon steel body containing one or more filtering elements characterised by maximum nominal filtration (99.9%) and very low pressure drops.