How to choose right pleated cartridge filter?

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With the continuous development of filtration technology, various industries should choose suitable pleated cartridge filter to ensure filtration efficiency and product quality.

As an efficient filtration device, Pleated Filters are widely used in different application scenarios in various industries. They utilize porous membrane material as a physical barrier, capable of capturing particles of a specific size or larger to achieve liquid filtration and purification.

Do you know anything about membrane-folded cartridges? What are the key factors we need to pay attention to when choosing a pleated cartridge filter? By reading this article, I believe you will have a clearer understanding of choosing membrane-folded cartridges.

What is Tangential Flow Filtration

What is the pleated cartridge filter?

Pleated Cartridge Filters with an asymmetric pore structure are primarily designed for applications requiring high flow rates and high particle suspension. Membrane filters are available in a variety of sizes and shapes, including cartridge, capsule and candle.

The process is to press the membrane into a cartridge shape through a cartridge folding machine, then install the cartridge membrane into the housing through a folding machine, and finally seal the two end caps through an end-sealing machine and connect the joints to finalize the process.

The working principle of membrane cartridge is to utilize the porous membrane material as a physical barrier to capture particles of specific size or larger.

These membranes are available in a variety of pore sizes, typically ranging from 0.1 to 10 microns, allowing for customization to specific filtration requirements.

Pleated Cartridge Filters are high-efficiency filtration devices that are widely used in different applications in various industries. These cartridges utilize membranes as the primary filtration medium to accurately remove contaminants from the fluid.

pleated cartridge filters

The characteristics of pleated cartridge filters are as follows:

  • The filtration medium utilizes a microfiber membrane to ensure precise filtration.
  • They exhibit low differential pressure and high flux, effectively enhancing filtration efficiency.
  • Pleated cartridge filters typically have a relatively low economic cost, making them suitable for cost-sensitive applications.
  • The structure of pleated cartridge filters is typically made entirely of polypropylene, including end caps, housing, and center rod, ensuring corrosion resistance and chemical compatibility.
  • They are fused using a hot-melt process, eliminating the need for any binder, which enhances cartridge stability and safety.
  • Pleated cartridge filters offer a wide range of chemical compatibility, making them suitable for various liquid filtration environments.
  • They come in a wide range of pore sizes and interface forms to cater to different filtration needs and customizable options.

Applications of Pleated Filters

Applications of Pleated Filters

Pleated Filters are used in a wide range of filtration processes in several areas, including the food and beverage industry (e.g., wine and bottled water), purification of water and chemicals in semiconductor and electronics manufacturing, and industrial and process water filtration in the pharmaceutical industry, among others.

  • Food and Beverage Processing: Used for the filtration and clarification of liquids in the production of beverages such as beer, wine, bottled water, and dairy products.
  • Biopharmaceutical Sector: In biotechnology applications, pleated cartridge filters are employed to filter biological products like amino acids and enzymes. In the pharmaceutical industry, they are widely used for filtering raw material liquids and pharmaceutical agents such as injections.
  • Electronics and Semiconductor Manufacturing: Pleated cartridge filters are utilized to purify industrial water and high-purity water in electronics and semiconductor manufacturing processes. This includes applications in manufacturing electronic chips, display processes, photolithography processes, and more.
  • Chemical Processing: Pleated cartridge filters are employed for the filtration and separation of chemicals in various industrial processes, including experimental solvents, fine chemicals, etc. They ensure product quality and consistency by removing impurities effectively.
What Is a Filter Membrane

Understanding the Types of Pleated Filters

Pleated filters are available in a wide range of sizes, shapes, and material options, allowing them to meet various filtration precision requirements. They can be categorized into pre-filters and final filters according to specific needs.

The primary function of pre-filters is to remove larger particles beforehand, thus reducing the risk of clogging in subsequent final filters and extending their service life.

Additionally, pre-filters play a crucial role in improving filtration efficiency and maintaining consistent pre and post-filtration processes to ensure uniform product quality.

Compared to pre-filters, sterilization filters (also known as final filters) focus more on the final step of filtration. These filters have high-precision membrane materials with small pore sizes that can effectively filter tiny particles as small as 0.1μm.

Moreover, most final filters feature fixed-point sterilization (commonly known as SIP- Steam-In-Place) and online high-temperature steam sterilization to ensure thoroughness and safety throughout the filtration process.

Filter Series Type
Ultrapure PP Filter Cartridge Polypropylene (PP) Normal
Stery PS Filter Cartridge Polyethersulfone (PES) Sterilization
GasFlow EPTF Filters Polytetrafluoroethylene (PTFE)high-temperature Gas Sterilization
CNS Filter Cartridge Nylon66 Sterilization
Stery PVF Cartridge Filter Polyvinylidene fluoride film (PVDF) Sterilization

How to Choose the Material of Pleated Cartridge Filters?

Influencing Factors on Performance

The performance of pleated cartridge filters is significantly influenced by the characteristics of the membrane material and its pore size distribution. Therefore, selecting the appropriate type of membrane is crucial for optimal filtration.

Chemical Compatibility

When considering filter membrane selection, the primary factor to assess is chemical compatibility. This involves evaluating the membrane’s resistance to various substances such as acids, bases, and organic solvents.

There’s a wide array of materials available, allowing for tailored selection based on the specific chemical properties of the liquids being filtered.

Preference in Acidic or Alkaline Environments

For environments with strong acids or alkalis, PTFE and PP membranes are preferred. PP membranes exhibit chemical stability and resistance to acids and alkalis, while PTFE membranes offer broad chemical compatibility with solvents, acids, and alkalis, making them a cost-effective choice.

Sterilization Filtration

For sterilization filtration requirements, PES membranes are suitable. These membranes are known for their acid and alkali resistance, low extractables, thermal stability, and low protein binding.

Utilizing a double-layer membrane structure for sterilization filters can enhance filtration efficiency by increasing the filtration area.

Selection for Specific Filtration Needs

Microporous glass fiber membrane filters are ideal for coarse filtration but unsuitable for hydrofluoric acid filtration. They are often used as pre-filtration material.

Hybrid cellulose ester, polycarbonate, or PVDF filter membranes are suitable for applications without acids or alkalis. PVDF membranes are even compatible with weak acid or alkali environments.

Preference in the Presence of Organic Solvents

In the presence of organic solvents, nylon membranes are the preferred choice. Nylon 66 membranes exhibit compatibility with most organic and water-based solvents, except for strong acids.

Some manufacturers offer positively charged nylon pleated cartridge filters designed to efficiently remove particles by binding to the negative charge of endotoxins. These are widely used in the biopharmaceutical industry, ensuring compliance with relevant standards and regulations.


When choosing the right Pleated Filters, we should consider various factors, because it directly affect the filtration efficiency and product quality.

I believe you already know how to choose the right Pleated Filters after reading this article. Our team is committed to providing high-quality Pleated Filters products and is willing to provide you with professional consulting services.

If you have any questions or need further information about Pleated Filters or other filter products, please feel free to contact us. We are looking forward to cooperating with you to solve your filtration needs and provide you with the best quality solutions.

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