FILTRATION

FLOWLarge particles trapped incoarse outer layersMedia gradually becomesfiner through the depth ofthe structureSmall particles trapped infiner inner layersFiltration media made-up of many different layers ofgraded density melt-blown polypropylene. Particulatematter is removed progressively throughout the media,resulting in a more efficient removal mechanismSome Typical PROGAF ApplicationsAll materials used in the construction of PROGAF FilterBags, including the multilayer melt-blown polypropylenemedia, are FDA/EC listed materials that meet theirrequirements for food contact applications. But food orbeverages are not the only applications that can takeadvantage of PROGAF’s high filtration efficienciesand capacity retention. The pharmaceutical, microelectronics,chemical, food, ink and paint, and watertreatment industries can also use PROGAF HighPerformance Filter Bags.Chemical and Pharmaceutical IndustriesDemanding filtration in high-purity industries are theapplications PROGAF was made for. Media capable ofremoval to 2 µm absolute with long service live is essentialfor activated carbon removal or catalyst recovery. Gelremoval requires a deep matrix of fine fibers. A PROGAFbag is ideally suited for each of these applications.Available in four filtration ratings, one of the PROGAFbags will deliver just the needed performance.Water FiltrationWater filtration applications have traditionally beendominated by cartridge filtration. Following extensiveworldwide trials, PROGAF 51 has demonstrated a log 3.5reduction of impurities in these demanding applications.Micro-ElectronicsThese applications typically require chemicals that areconstantly filtered to extremely low levels of particlecontaminant. PROGAF’s special profile, with its highefficiency media and graded density structure, providesperformance characteristics superior to that of traditionalcartridge type filtration. PROGAF out-performs cartridgesin terms of dirt-holding capacity, service life, and cost.Membrane prefiltration significantly reduces the SDIvalues in water filtration.Compare PROGAF to Filter Cartridges andSee the DifferenceThe two charts on the next page graphically illustrate theadvantages of PROGAF High Performance Filter Bagsover different types of filter cartridges. PROGAF FilterBags and filter cartridges come in many shapes and sizes.Compare PROGAF Filter Bags with their cartridge equivalentin material, micron rating and industry qualifications.Progressive structure of PROGAF filter bags deliversoperating differential pressure which starts and remainslower during filter life than other comparable filters. Thechart shown here illustrates the results of actual comparisontests made against two common styles ofcartridge filters: depth-loading and pleated polypropylene.During laboratory loading tests, the PROGAFfilters remained at the lowest differential pressure of any32