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What is a Cartridge Filter Core? Structure and Operating Principle
The cartridge filter core, commonly referred to as the dust filter core, cartridge filter tube, or cartridge filter, is designed to remove dirt and impurities from liquids and air. It is a versatile filtration solution used across various industries for both air and liquid purification.
Table of contents
What is a Cartridge Filter Core?
The cartridge filter core is a cylindrical filter designed to remove dirt and impurities from liquids and air.
Cartridge filter cores are widely used in the chemical and air filtration technology industries.
The cartridge dust filter core is also referred to by various names, including fine filter core, dust filter core, cartridge filter tube, and cartridge filter.
For more information, refer to products like the VCR Pleated Filter Cartridge.
Structure of Cartridge Filter Core
The cartridge filter core is designed in various sizes with different lengths and diameters. The filter core is made from a variety of materials such as woven or non-woven dust filter cloth, membranes, polypropylene, PTFE, plastic, and stainless steel (inox), each offering distinct advantages.
The filter cartridge consists of two main parts:
- Internal filter core: Made from natural or synthetic fibers, supported by a wire mesh frame in the center.
- Outer shell: A mesh structure that provides protection for the inner filter core.
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Operating Principle of Cartridge Filter Core
The cartridge filter core operates based on the principle of physical filtration. It is used to filter liquids and air.
For liquids, cartridge filtration is considered the heart of the filtration system. It is inserted inside the purifier and used to remove contaminants from water.
The liquid enters through the inlet nozzle of the purifier. Under pressure, the liquid passes through the cartridge filter core, where contaminants are removed. Contaminants are trapped on the surface of the filter, while the filtered liquid flows out through the outlet nozzle.
For air filtration, the airflow enters the cartridge dust filter core, driven by the exhaust fan. As the airflow enters the core, its speed is suddenly reduced, causing larger dust particles to fall into the dust collection funnel. The remaining smaller dust particles are captured on the surface of the cartridge filter by the pressure difference generated by the fan, and the filtered, clean air exits the cartridge filter.
Specification of cartridge dust filter
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Figure
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Round pillar
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| Outer diameter | 120-320 mm |
| Inner diameter | 85-230 mm |
| Height | 500 - 1500 mm |
| Filter material | PE fiber, PTFE fiber,... |
| Temperature | 200-890℃ |
| Guard-net | Steel, stainless steel (inox) |
Some Popular Cartridge Dust Filters
Currently, there are many types of cartridge filters available on the market, each designed for specific purposes, such as filtering gases or liquids.
Air Filter Cartridges
Air filter cartridges are used in air filtration systems, vacuum systems, and other applications in industries such as cement production, metallurgy, textiles, chemical processing, metal welding, and packaging spraying.
Vacuum cleaner systems using cartridge filtration include devices such as silo top dust filters, horizontal centrifugal dust filters, cloth bag dust filter units with dust bag frames, vertically mounted cartridge dust filters, and flat dust filter devices.
Liquid Filter Cartridge Core
The cartridge filter is used to remove impurities and particles from water and liquids.
Cartridge filters are often used in RO (Reverse Osmosis) water filtration systems, also known as cartridge filter elements, for filtering chemicals and solvents in the production of alcohol, beer, cosmetics, compressed air, and more.
Some common types of liquid filter cartridges include:
Wound Cartridge Filter: Removes harmful substances
- Material: natural or synthetic fibers, wound around a central support frame
- Filters: sand, sediment, lime, rust, fine dust particles, and dust particles ranging from 0.5 to 150 microns in size
- Applications: drinking water, boilers, washing machines, water treatment filtration, seawater desalination, and more
- Length: 127mm, 254mm, 508mm, 762mm, 1016mm
Melt-blown filter cartridges
- Material: made from polymer fibers that are pressed and fixed thermal bonding, then blown to melt into the rotating axis to create a cylindrical filter
- Filter: sand, sediment, lime, rust, fine dust particles with a size of 1-75 microns
- Application: Melting cartridge filtration is widely used in sedimentation applications, water treatment, preliminary filtration of pure water, refined chemicals, reverse osmosis, seawater desalination, beverages, solvents, cosmetics ...
- Length: 127-254-508-762-1016 mm
Activated carbon cartridge filter
- Material: made from wool fibers, or washed polypropylene fibers or polyester felt filter media, bonded with activated carbon particles
- Remove color, odor, taste, pesticide, chlorine pollution, organic matter
- Filter dust particles, pollutants with a size of 1-25 microns
- Application: Drinking water, washing machine, anti-chlorine treatment in the chemical industry, pharmaceuticals, treatment for reverse osmosis units…
- Length: 101-127-177-254-508-762 mm
Stainless steel cartridge filter
- Material: stainless steel filter mesh with an inner core made of polypropylene fiber.
- Filter: sand, sediment, rust with a size of 70 microns
- Application: drinking water filtration, washing machines, boilers, preliminary filtration for pumps, irrigation systems, industrial system protection ...
- Length: 101-127-177-254-508 mm
Pleated filter cartridge
- Material: Polypropylene or stainless steel filter mesh with many folds with a polypropylene inner core.
- Filter: Sand, sediment, rust with a size of 50 microns
- Application: Drinking water, boilers, washing machines, pre-filtration of water, pumps, irrigation systems, protection of industrial works ...
- Length: 101-127-177-254-508 mm
Oil box cartridge filter
- Material: The core is made of polypropylene fiber, the outer shell is made of oil mass absorbing material
- Remove: oil, dispersant and emulsifier
- Application: oil and gas industry, transformer wastewater treatment system, surface water, other industrial applications ...
- Length: 1016 mm
Application of Cartridge Dust Filter Core
Industrial cartridge filters are used in industries such as pharmaceuticals, chemicals, inks and paints, food and beverages, automobile manufacturing, cement industry, oil and gas, refineries, petrochemicals, etc.
How to Clean the Cartridge Filter
For filter cartridges, it is important to clean these filter cores to ensure stable and long-term filtration performance.
Industrial filter cartridges have a high dirt-holding capacity and are easy to install, clean, and maintain. When cartridge filters have a durable core and well-structured media layers, cleaning and installing them becomes easy.
Some filtration systems allow backwashing and have CIP (Cleaning in Place) design. Others require removal from the shell, disinfection, and washing. After cleaning, the filter cartridges are dried and sealed to prevent contamination or damage.
