Liquid Filter Cartridges

Cartridge filters are offered in a wide range of materials and configurations. They can be a surface or depth type filter. Depth filters capture particles and contaminants through the total thickness of the media. Surface filters are usually made of thin material such as papers, woven wire and cloths, and particles are blocked on the surface of the filter.

Surface filters are best when you are filtering similar sized particles. If all particles are 5 micron, a pleated 5 micron filter works best because it has more surface area than other filters. Compared with pleated surface filters, depth filters have limited surface area, but they have the advantage of depth and higher dirt holding capacity.

Liquid flows from the outside of the cartridge to the center core, so the filter housing, end caps and seals have to fit correctly for the cartridge to perform. A filter bag pre-filter ahead of the cartridges can extend cartridge life and reduce operating costs. In a water treatment or water filtration system, sediment filters remove rust, dirt and particulate, while activated carbon filters are used to reduce chlorine and odor.

Need a first stage pre-filter? See our liquid filter bags →

AFF pleated filter cartridges are available in standard and high efficiency configurations. They are manufactured from polyester and polypropylene filter media, and each pleat adds surface area for higher flow rates, better filtration efficiency and longer service life. Polypropylene offers broad chemical compatibility for water, chemicals and coating liquids.

Standard diameters are 2.5 inches and 4.5 inches, in lengths up to 40 inches. All seams are ultrasonically welded to avoid any bleed through. Polypropylene elements are available with polypropylene cores, and custom sizes are available.

Depth cartridges offer high dirt-holding capacity and graded particle retention. AFF melt blown cartridges are manufactured from polypropylene or nylon. They are made with or without a core in a wide range of sizes, and the end caps are thermally welded so binders and other contaminants do not get into the product.

String wound cartridges are an excellent low cost liquid filter cartridge, available in several particle retentions, materials and lengths. Choose bleached or natural cotton, polypropylene or glass media, with cores in polypropylene, stainless steel or tin steel. Glass is highly resistant to corrosive agents and withstands temperatures up to 750°F.

AFF membrane filters are surface filtration cartridges that provide sub-micron filtration for demanding applications. We offer membrane filtration from 0.03 to 20 micron in a wide range of end cap configurations, so the filter membrane seals correctly in your housing and prevents contamination of the process fluid.

Membrane cartridges are usually the final stage in a liquid filtration system, after bag or depth pre-filters remove the bulk of the sediment, so the membrane is protected and lasts longer. Common uses include pharmaceutical, food and beverage and other process applications that need fine, reliable filtration performance.