What is the filter element made of? How does it compare to paper or cotton filters?
At the heart of the unique pipercross air filter is a specially developed polyurethane foam which acts as the filtration medium, having both higher performance and life expectancy than paper. Pipercross reticulated foam is created by a chemical reaction, it is then placed in a gas filled combustion chamber where a controlled explosion burns away any complete cell walls in the material to form a skeletal cellular structure which is strictly quality controlled. This process, which is specified by Pipercross ensures that the foam consists of tiny open cells which trap contaminants. The cell size of the foam, its porosity, is measured in Pores Per Inch (PPI). Pipercross air filters use up to six layers of foam with varying porosity descending in pore size in the direction of air flow. The Pipercross filters long life span is due to the dirt storage capacity of the foam cells and the filters construction which means no air passage is blocked until all the cells in a layer of foam are comple
