Modern industrial processes have reached very high levels of sophistication and require compressed air systems characterised by increasingly higher purity levels; inadequate or inefficient filtration can in fact cause service interruptions, high maintenance costs and loss of productivity. The PureTec - HEF filters were specifically designed to avoid these problems, offering levels of efficiency guaranteed and verified in the laboratory, in a range of configurations designed to suit every type of requirement. The HEF filters consist of an aluminium body containing a filtering element characterised by extremely high efficiency of nominal retention (99.99%) and very low load losses.