The Flow-Pure depth filter cartridge was manufactured by four different pore diameter of spray nozzle
which is according to the patent of Filtteck “the multi-layers production”. The four-layers structure PP depth cartridge is functioned with fine fibers in inner layer and coarse fibers in outer layer which constitutes four different pore diameters in order to filtrate particles in different layers. This design has high contaminant holding capacity, which also ensures a longer service life and lower pressure drop.