Not always a mark up of a cartridge filter area means longer lifetime for the filter.
In de-dusting of sandblasting machines, may occur to have fast-clogging filter elements. To avoid this problem, a surface increase is made with increased filter area elements. Very often this choice reverts on the final result, since to have more surface area in the same filter cartridge, an higher pleat number is required. The dust makes easily "bridges" between the increased number of pleats, making the filter element completely CLOGGED on most of the surface, shortening its lifetime