Everything You Need to Know About Cartridge Filters

Cartridge filters are indispensable components in various industries, including water treatment, chemical processing, pharmaceuticals, and food and beverage. Their versatility, ease of installation, and maintenance, coupled with high filtration efficiency, make them a preferred choice for many applications. At Dashang, we strive to provide comprehensive, high-quality filtration solutions tailored to meet the specific needs of our customers. This guide will delve into the intricacies of cartridge filters, offering insights and information that surpasses what our competitors offer.

  • What Is a Cartridge Filter?

  • Working Principle of Cartridge Filters

  • Types of Cartridge Filters

  • Features of Cartridge Filters

  • Where to Buy Cartridge Filters

  • Conclusion

What Is a Cartridge Filter?


A cartridge filter is a filtration device used to remove impurities and particles from liquids or gases. It typically comprises a cylindrical or pleated filter element encased in a housing made from materials like paper, polyester, or cotton. The design includes a specific micron rating, determining the particle size the filter can capture. The fluid flows through the filter element, which traps impurities, allowing only clean liquid or gas to pass through.


Working Principle of Cartridge Filters


The working principle of a cartridge filter is based on physical filtration, which involves separating solids from liquids or gases by passing them through a porous medium.


1. Mechanical Filtration: Contaminated fluid enters the filter housing through an inlet port and passes through the filter element. The porous medium, typically made of paper, cloth, or synthetic fibers, traps solid particles larger than the pore size on its surface or within its fibers.


2. Depth Filtration: As the fluid continues to flow through the filter element, trapped particles accumulate, forming a layer of filter cake. This layer helps trap smaller particles that might pass through the larger pores of the filter element, enhancing filtration efficiency.


3. Cleaning and Maintenance: Over time, the filter element becomes clogged with trapped particles, reducing its efficiency. When this occurs, the filter element must be replaced or cleaned to maintain the filtration system's effectiveness.

General Classification of Cartridge Filters

Cartridge filters come in two main types: depth filters and surface filters.

Depth filters work by trapping particles within the filter media matrix, while surface filters use a barrier to physically trap particles on the filter element's surface.

Cartridge filters can be customized to suit different flow rates, pressures, and temperatures based on specific application needs. For instance, a water treatment filter may utilize polypropylene filter media, whereas a filter for high-temperature applications may use ceramic filter media.

Some cartridge filters may include additional components like activated carbon to eliminate chlorine or other chemicals from water, or antimicrobial agents to prevent bacterial growth.

The pore size of the filter media plays a crucial role in determining the filtration efficiency and flow rate of the cartridge filter.


Types of Cartridge Filters


Cartridge filters come in various types, each designed for specific applications and filtration needs. Here's an overview of the most common types:


1. Depth Filters: These filters trap particles within the filter media's matrix, making them ideal for applications requiring high dirt-holding capacity and low pressure drop. They are usually made from cellulose, polypropylene, or activated carbon.


2. Pleated Filters: Featuring a pleated design that increases the filter media's surface area, these filters are suitable for higher flow rates and longer service life. Commonly made from polyester, cellulose, or PTFE, they are used in industrial water filtration and HVAC systems.


3. Membrane Filters: Made from materials like nylon, PTFE, or PVDF, membrane filters act as semi-permeable membranes that allow only specific substances to pass through. They are essential in medical, laboratory, and high-purity applications such as pharmaceuticals and biotechnology.


4. Activated Carbon Filters: Filled with activated carbon, these filters remove impurities and odors from liquids and gases. They are widely used in water purification, air purification, and gas processing applications.


5. Absolute-Rated Filters: Designed to remove particles of a specific size or larger with high efficiency, these filters are used in critical applications where even minimal contamination can be harmful.


6. Spun Bonded Cartridge Filters: Made from polypropylene fibers spun and bonded to create a nonwoven material, these economical filters are used in water treatment, food and beverage processing, and pharmaceuticals.


7. Wound Cartridge Filters: Created by winding a string around a central core, these filters are typically made from cotton, fiberglass, or polypropylene. They are ideal for applications requiring high temperature or chemical resistance.


8. Ceramic Cartridge Filters: Made from durable ceramic material, these filters can withstand high temperatures and pressures, making them suitable for industrial applications requiring high-efficiency filtration.


9. Stainless Steel Cartridge Filters: These robust filters are used in high-temperature and high-pressure applications, including oil and gas filtration, chemical processing, and water treatment.


10. Bag Cartridge Filters: These filters fit inside a filter bag and are used in applications such as paint and coatings, chemical processing, and water treatment.


11. String Wound Cartridge Filters: Similar to wound cartridge filters but with a tighter winding pattern, these filters offer greater filtration efficiency.


12. High Flow Cartridge Filters: Designed for high-flow rate applications, these filters have a larger diameter than standard cartridge filters and are used in industrial applications like water treatment and HVAC systems.


Features of Cartridge Filters


Cartridge filters consist of several essential components that contribute to their effectiveness and durability:


1. Filter Media: The porous material that captures impurities. It can be made from cellulose, polyester, or polypropylene.

2. Support Core: A rigid structure, typically plastic or metal, that provides structural support to the filter element.

3. End Caps: Made from durable materials like plastic or metal, end caps seal the filter element's ends and provide a mounting point within the filter housing.

4. Gaskets: Create a seal between the filter housing and the end caps, ensuring that the filtered fluid passes through the filter element without bypassing it.

5. Housing: The protective enclosure for the filter element, usually made from plastic or metal, with inlet and outlet ports for fluid flow.


Where to Buy Cartridge Filters


At Dashang, we offer a wide range of high-quality cartridge filters to meet diverse industrial needs. Our filters are manufactured to the highest standards and are available in various sizes, materials, and configurations. Whether you need a filter for water treatment, chemical processing, or any other application, we have the solution. Visit our website to explore our products and place your order today.




Cartridge filters are vital in maintaining the purity and quality of liquids and gases in various industrial applications. By understanding the different types of cartridge filters, their working principles, and key features, you can make an informed decision about the best filter for your needs. At Dashang, we are committed to providing superior filtration solutions that ensure optimal performance and reliability. Contact us today to learn more about our products and how we can help you achieve your filtration goals.

Everything You Need to Know About Cartridge Filters



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