The LP-Grades 10,20, and 30 depth filter cartridges are constructed entirely of polypropylene, and the LPGrades 50, 60, 70, and 80 depth filter cartridges are constructed of polypropylene, borosilicate glass and polyethylene binder. Both types of cartridges provide excellent chemical and solvent resistance. All LP cartridges have a graded efficiency construction: the filtration efficiency increases from the inside surface to the outside surface, in the direction of flow. This construction provides exceptionally high solids holding capacity, which translates into a longer life of the filter cartridge. The seven retention efficiency grades offered cover the ranges from 75 micron to 0.22 micron (see table, on next page).
The Balston LP depth filter cartridges may be used for fine filtration of liquids with heavy dirt loading, when chemical or solvent resistance is required, or as prefilters to ultra-high efficiency or membrane filtration applications.