Shelco’s PDA & PDH Series Absolute Rated Melt Blown Cartridges and are ideal for food & beverage and pharmaceutical applications. The PDA Series has a 99.9% retention rating from 0.5 to 70 microns and the PDH Series has a 90% retention rating from 0.5 to 75 microns. The 100% melt blown polypropylene microfibers re thermally bonded into a multi-layer gradient density pore structure for maximum dirt holding capacity in each filter. FDA listed materials of construction meet USP Class IV criteria. The PDA Series are lot traceable industrial filters and come with a certificate of conformance. Fixed-pore structure blown over rigid center core provides greater stability for higher differential pressures and elevated temperature conditions.