What is a cartridge filter and how does it work?
Cartridge filters are simple, modular filters that are inserted into a housing and can be used to remove particles, chemicals, and other pollutants from liquids and solvents. Pollutants are removed as the liquid flows inside the housing through the filter element, where unwanted solids are trapped inside the cartridge filter.
What are cartridge filters made of?
Cartridge filters can be made from a number of materials, such as wound strands, carbon, polypropylene and more, to filter out different types of pollutants. Some are even made with titanium to withstand corrosive liquids or high temperatures.
What can these filters remove?
Cartridge filters come in various micron ratings (μm) which are used to determine the size of the particles you'd like to remove. Depending on the micron rating selected, these filters can remove sediment, metals, and even microorganisms from liquids. Some industries require a combination of multiple filters with different materials and micron ratings throughout their manufacturing processes. The chart below showcases the different filtration levels and types of filters required to remove pollutants of different sizes.
Nominal VS Absolute Rating
You may see these terms quite often when dealing with cartridge filters. It simply means the level of efficiency in particulate removal. Nominal filtration has 80%-90% removal efficiency, while absolute rating ranges between 98% and 99.99%.
How many categories of cartridge filters are there?
Graver Tech divides it's cartridge filters to four categories:
Depth Filters – Cylindrical products with tortuous path for capturing wide range of particle sizes and gelatinous contaminant.
Pleated Filters – Pleated configuration provides higher surface area than depth filters for greater dirt holding capacity and longer on-stream life including large diameter high flow filters.
Membrane Filters – Pleated membrane filters for precise removal of contaminants including vent filters, bacterial filters, as well as wine filters and beer filters.
Specialty Filters – Materials of construction provide unique performance benefits suitable to filter industrial fluids
Learn the difference between depth and membrane filters here.
How are cartridge filters different from other types of filters?
Cartridge filters typically have a higher filtration level than other filters. For example, a sand filter may have a micron rating of 20-40μm, while a cartridge filter's rating can go as low as 0.05μm. They also work best when there is not so much solids in the water, operating effectively and economically with contamination levels of less than 100ppm, so that it doesn't clog up so quickly. For heavier contamination applications, cartridges are normally used as final polishing filters.
Liquid flows from outside to inside, so the core of these filters have to be strong in order to handle the increased pressure. To support this, some cartridge filters have outer cages for increased stability and capacities. To learn more about our filters, visit our product page or contact us.