Pleated Filter Cartridge Supplier
What Is a Pleated Filter Cartridge?
A pleated filter cartridge is a filter element made from folded filter media. The pleated structure increases the available filtration area, allowing the cartridge to handle higher flow rates with lower pressure drop compared with flat or non-pleated media.
Pleated cartridge filters can be designed for nominal filtration or absolute-rated filtration, depending on the media type and application requirement. They are commonly used for prefiltration, final filtration, polishing filtration and equipment protection.
How Pleated Filtration Works
Pleated filtration works by passing liquid through folded filter media. The pleats create a larger effective surface area, which helps distribute particle loading across the media and maintain stable flow.
In many systems, a pleated filter cartridge is selected when the user needs higher flow capacity, lower pressure drop, longer service life or more consistent filtration performance than a standard depth filter cartridge.
Main Types of Pleated Filter Cartridges
Pleated Depth Filter Cartridges
Prefiltration, high solids loading, downstream protection.
Pleated Membrane Filter Cartridges
Fine filtration, final filtration, controlled retention.
Higher dirt-holding capacity, stable differential pressure, longer service life.
Depth Pleated vs Membrane Pleated Filter Cartridge
Depth pleated and membrane pleated cartridges both use a folded structure, but they are designed for different filtration goals. Depth pleated cartridges are usually selected for economical and stable particle removal, while membrane pleated cartridges are selected for higher precision or critical filtration.
| Feature | Pleated Depth Filter | Pleated Membrane Filter |
|---|---|---|
| Main Function | Remove bulk contaminants, protect downstream filters |
Precisely remove fine particles and microbes |
| Filtration Mechanism | Depth filtration through porous structure |
Surface (membrane) filtration |
| Dirt-Holding Capacity | High | Lower |
| Retention Consistency | Varies with loading | Consistent and precise |
| Typical Position | Prefiltration | Final / Polishing filtration |
| Typical Materials | PP, Polyester, Glass Fiber, Cellulose, etc. |
PES, PTFE, Nylon, PVDF, etc. |
| Typical Applications | High solids, coarse filtration, protection |
Fine filtration, sterile filtration, critical fluids |
Nominal vs Absolute Micron Rating
Micron rating is one of the most important factors when selecting a pleated filter cartridge. A nominal-rated filter removes a high percentage of particles at a stated size, while an absolute-rated filter provides more defined particle retention at the rated micron size.
Nominal pleated filters are commonly used for general prefiltration and process filtration. Absolute-rated membrane pleated filters are used when particle control, product quality or downstream protection is more critical.
Common Pleated Filter Cartridge Materials
PP Pleated Filter Cartridges
General water, chemicals, pre-filtration.
PES Membrane Filter Cartridges
High flow, wide chemical compatibility.
PTFE Membrane Filter Cartridges
Aggressive chemicals, high-temperature applications.
Nylon Membrane Filter Cartridges
Strong and durable, suitable for organic solvents.
PVDF Membrane Filter Cartridges
Excellent chemical resistance.
Glass Fiber Pleated Filter Cartridges
High-temperature applications, viscous fluids, oil.
Pleated Filter Cartridge Applications
Chemical Processing
Pleated filters are used to remove particles from chemical solutions, solvents, acids, alkalis and process fluids, depending on material compatibility.View More>>
Water Treatment
Pleated filter cartridges are used for particle removal, polishing filtration and protection of downstream equipment. View More>>
Seawater Desalination and RO Pretreatment
In seawater desalination systems, pleated cartridges can be used as RO security filters to protect membranes from particles, silt, rust and UF breakthrough. View More>>
Microelectronics
Membrane pleated filters are used for fine particle control in high-purity water, chemicals and electronic-grade process fluids.View More>>
Food and Beverage
Pleated cartridges can be used in process water, beverage clarification, utility water and other filtration points where suitable materials and hygiene requirements are met.View More>>
Pharmaceutical Utilities
Membrane pleated cartridges may be used in clean utilities, sterile venting, prefiltration and critical liquid filtration depending on validation and regulatory requirements.View More>>
Pleated Filter Cartridge Sizes and Configurations
Standard Cartridge Lengths
10 inch, 20 inch, 30 inch and 40 inch.
Custom lengths are also available.
End-Cap Options
DOE, 222/Flat, 222/Fin, 226/Flat, 226/Fin and custom options.
Seal Materials
EPDM, Silicone, FKM/Viton, NBR and PTFE-encapsulated seals.
Micron Ratings
Micron ratings vary according to the selected filter media and cartridge series.
How to Select the Right Pleated Filter Cartridge
Key selection factors include:
- Nominal or absolute rating
- Micron rating
- Filter media material
- Cartridge length
- Outer diameter
- End cap type
- Seal material
- Flow rate
- Pressure drop
- Operating temperature
- Chemical compatibility
- Dirt holding capacity
- Service life
- Regulatory or validation requirement
Common Pleated Filter Cartridge Problems
Rapid Differential Pressure Rise
Caused by high solids loading, unsuitable filter media or an undersized filtration system.
Chemical Compatibility Failure
Filter media or sealing materials may degrade when exposed to incompatible chemicals or excessive temperature.
Short Service Life
May result from high contaminant loading, chemical attack or unsuitable operating conditions.
Cartridge Collapse or Deformation
Can be caused by excessive differential pressure, high temperature or improper installation.
Inconsistent Filtration Performance
May result from unsuitable media selection, bypass leakage or damaged filter cartridges.
Incorrect End Cap or Seal
Can cause leakage, bypass, poor housing fit and filtration system failure.
Manufacturing, Quality and Custom Pleated Filter Support
Media and Material Confirmation
Qualified raw materials with full traceability.
Pleating and Assembly Control
Consistent pleating, bonding and assembly processes.
Dimensional Inspection
Strict dimensional control for proper housing fit.
Performance Testing
Bubble-point, integrity, flow and pressure-drop testing as required.
Technical Documentation
COA, test reports and validation documents available upon request.
Customization Options
Custom media, sizes, end caps, seals and packaging.
FAQ
What is a pleated filter cartridge?
A pleated filter cartridge uses folded filter media to increase the effective filtration area within a compact cartridge structure. Depending on the media type, it can be used for prefiltration, clarification, fine filtration or final filtration.
What is the difference between depth and membrane filters?
Depth filters capture particles throughout the thickness of the filter media and usually offer higher dirt-holding capacity. They are commonly used for prefiltration and high-solids applications.
Membrane filters retain particles mainly through a controlled pore structure and provide more consistent filtration efficiency. They are generally used for fine, polishing or final filtration.
Which filter media should I choose?
The correct filter media depends on the liquid type, contaminant characteristics, required micron rating, chemical compatibility and operating conditions.
Common options include:
- PP for industrial water, RO pretreatment and general chemical filtration
- PES for fine filtration of water-based and high-purity liquids
- PTFE for aggressive chemicals, solvents and gas filtration
- Nylon for compatible aqueous and solvent-based liquids
- PVDF for high-purity and low-protein-binding applications
- Glass fiber for high dirt-holding prefiltration
What is a pleated filter cartridge used for?
A pleated filter cartridge is used for particle removal, prefiltration, polishing filtration and equipment protection in water treatment, RO pretreatment, chemical processing, food and beverage, electronics and pharmaceutical utilities.
What is the difference between nominal and absolute filtration ratings?
A nominal rating indicates that the filter removes a stated percentage of particles at a specified size under defined test conditions.
An absolute rating represents a more controlled retention level at the stated particle size. The exact efficiency should always be confirmed according to the manufacturer’s test method and Beta ratio.
What cartridge lengths are available?
Common cartridge lengths include:
- 5 inch
- 10 inch
- 20 inch
- 30 inch
- 40 inch
Custom lengths may also be available depending on the filter series and project requirements.
What are DOE, 222 and 226 end caps?
222 and 226 end caps use O-ring seals for more reliable installation and sealing inside the filter housing. They are commonly available with:
- Flat closed end
- Fin end
- Spear end
- Customized configurations
The correct end-cap type should be confirmed according to the existing filter housing.
How do I choose a pleated filter cartridge material?
Choose PP for general water and chemical filtration, PES for cleaner fine filtration, PTFE for aggressive chemicals or gas applications, and Nylon for compatible solvents and specialty liquids.
Request a Pleated Filter Cartridge Recommendation
If you are not sure which pleated filter cartridge to choose, send us your fluid type, flow rate, micron rating, operating temperature, chemical condition and filtration target. Ecofiltrone can recommend a suitable pleated filter cartridge for your application.
Need Help Selecting a Pleated Filter Cartridge?
Please send us your application, liquid type, contaminant information, micron requirement, cartridge size, end-cap configuration, flow rate, temperature, pressure, and quantity.
Our filtration experts will recommend the best solution for you.