PRE I offers a gradual pressure increase during cartridges life versus surface type media that have an abrupt flow cut off when loaded. It provides true depth filtration utilizing hundreds of tapered filtering passages of controlled size and shape.
As the cartridges are wound, each layer of roving is napped to increase filtration capabilities. As a result, each layer of roving contributes to true depth filtration by trapping its share of particles. In addition, irregular blinding is assuring both longer cartridge lifespan and full cartridge utilization.