What is a Pleated Filter Cartridge and how do I use it?

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As an efficient filtration device, Pleated Filter Cartridges 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 about Pleated Filter Cartridges? What should we pay attention to when using and replacing Pleated Filter Cartridges? Read this article to help you use Pleated Filter Cartridges correctly and efficiently.

What is a pleated cartridge and how does it work

What is a pleated cartridge and how does it work?

Pleated cartridge filters with an asymmetric pore structure are primarily used in applications requiring high flow rates and high particle suspensions.

The process involves pressing the membrane into the cartridge shape by means of a cartridge pleated machine, then installing the cartridge membrane into the housing by means of a pleated machine, and finally sealing the two end caps and connecting the fittings by means of an end cap sealing machine to finalize the entire process.

Pleated cartridge filters work by utilizing a porous membrane material as a physical barrier to capture particles of a specific size or larger.

These membranes are available in a variety of pore sizes, typically ranging from 0.1 microns to 10 microns, and can be customized to meet specific filtration requirements.

These cartridges utilize the membrane as the primary filtration medium to accurately remove contaminants from the fluid. Filter cartridges are housed in a housing or enclosure and are used to remove unwanted particles, contaminants, and chemicals from the fluid.

As the cartridge flows within the housing and through the filter element, the cartridge is exposed to the water, liquid or solvent that needs to be filtered. pleated filters also remove submicron particles.

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.
What is the basic construction of a filter cartridge

What are the basic components of a filter cartridge?

Filter cartridges are usually made up of several basic components, including:

  • Filtration Media: This is the main component of the cartridge and is responsible for capturing and removing contaminants from the fluid being filtered. Filter media can be made from a variety of materials including paper, polyester, polypropylene and activated carbon.
  • End Caps: these components hold the filter media in place and provide a seal between the cartridge and the filter housing.
  • Core: This is the center structure of the cartridge and provides support for the filter media and prevents it from collapsing under pressure.
  • Gasket/O-Ring: These components form a seal between the cartridge and the filter housing to prevent fluid from bypassing the filter. Different types of sealing materials have their own properties and application scenarios.
  • Support Cage: This is a metal or plastic structure that provides additional support to the filter media and helps maintain its shape during operation.


Material Characteristics Applications
Buna-N Provides good sealing, but is susceptible to corrosion Suitable for general fluid sealing, resistant to petroleum-based fuels
EPDM Excellent ozone resistance, retains shape and has long service life Pharmaceutical industry and other FDA regulated processes
Silicones Holds shape and seals for long periods of time, with resistance to high temperatures and a wide range of chemicals Seals in high temperature and chemical environments
Polytetrafluoroethylene or polytetrafluoroethylene (PTFE) Excellent abrasion and corrosion resistance for optimal chemical compatibility Applications requiring chemical compatibility, such as pharmaceutical filtration
Viton or fluoroelastomer Excellent sealing performance and compatibility with gases, fuels and a wide range of organic chemicals Suitable for a wide range of chemical environments, but sensitive to low temperatures

NOTE: When choosing the right cartridge filter assembly and material, you need to pay attention to the type of filter and application.

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How do I replace a pleated cartridge filter?

Cartridges are used in many industrial applications to capture contaminants and solid waste. These liquid filter cartridges must be replaced when they reach a preset pressure differential.

When should I replace my pleated filter cartridge?

Filter cartridges manufactured by Sanitek come with an installation manual that recommends the number of days the cartridge should be used. However, the life of the cartridge also depends on the concentration of contaminants in the fluid.

When your differential pressure reaches a preset value (e.g. 10 psi), the cartridge is now clogged and can no longer hold dirt, and needs to be replaced. Failure to replace the cartridge over a long period of time can result in poor filtration, leakage or even damage to the product.

How to replace the pleated filter cartridge correctly?

How to replace the pleated filter cartridge correctly

Below are detailed steps to properly and safely replace a pleated filter cartridge:

  1. Open the clamp and remove it from the housing.
  2. Ensure that the interior of the housing is clean and free of particles.
  3. Remove the cartridge filter from the plastic bag.
  4. Wet the O-ring with purified water to ease cartridge installation.
  5. Insert the cartridge bottom into the housing base by twisting the cartridge slightly while exerting downward pressure until the adapter tabs properly engage in the locking area.
  6. Place the housing onto the base, ensuring the gasket is seated properly in the base groove.
  7. Secure the closure with the sanitary clamp.
  8. Hand tighten the clamp (do not overtighten).

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How are pleated filter cartridges cleaned?

Some filtration systems allow backwashing and utilize a CIP design. Others must be removed from the filter housing, sanitized and cleaned. When not in use, these clean filter cartridges are dried and sealed to avoid contamination or wear.

Where can I buy high-quality pleated filter cartridges?

When it comes to choosing the right pleated filter cartridges for your needs, you can count on Sanitek to provide a wide range of cartridges made from quality materials to meet the needs of a variety of industries and applications.

With Sanitek, you can rest assured that you are purchasing a reliable, high-quality product that will help you achieve more efficient and reliable fluid handling and filtration.

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