Views: 215 Author: Site Editor Publish Time: 2025-11-04 Origin: Site
Choosing the right filter cartridge is only half the battle—the end caps you select play an equally vital role in ensuring system reliability, safety, and performance. In this guide, we explore key end cap types, industry standards, and practical selection criteria, along with an introduction to LOONG Filtration’s high-performance pleated filter cartridges.
End caps are mainly categorized into two configurations based on application scale and sealing requirements
Ideal for small-scale or single-cartridge systems
Easy installation and removal
Moderate sealing performance
Suitable for low-pressure applications
Designed for large or multi-cartridge systems
Enhanced structural stability
Superior sealing under high-pressure or high-flow conditions
Commonly used in industrial and pharmaceutical setups
Adherence to international standards such as ISO 3601-1:2012 ensures compatibility, safety, and ease of maintenance. Below are widely used end cap models:
| Model | Type | Key Applications | Key Features |
| 215 | Flange | Compact systems | Space-saving, small cartridges |
| 222 | Flange | General industrial use | Universal fit, reliable sealing |
| 226 | Tri-Clamp | Pharma, food, and beverage | Hygienic, easy sanitization |
| M20 | Threaded | Moderate-pressure systems | Good hold, medium sealing |
| M30 | Threaded | High-pressure/temperature uses | Robust connection, high sealing |
Selecting the appropriate end cap involves more than just matching sizes. Keep the following factors in mind:
Follow OEM recommendations—especially when working with proprietary systems or custom housings.
LOONG Filtration specializes in high-quality pleated filter cartridges compatible with a wide range of end cap options. Our products are engineered to deliver precision, durability, and chemical compatibility.
Hot-melt welding ensures robust end cap attachment
Pure physical pleating increases dirt-holding capacity and flow rates
Broad material selection includes PP, PES, Nylon, PTFE, and PBT
Custom end caps (215/222/226, M-series threads, and more)
Hydrophobic PTFE Cartridges
Perfect for aggressive solvents and gases. Withstands repeated steam sterilization and offers excellent chemical resistance.
Hydrophilic PES Pleated Cartridges
Ideal for biopharma and sensitive processes. Low extractables, high throughput, and integrity tested before shipment.
Sterilizing Grade Nylon Cartridges
Naturally hydrophilic, no pre-wetting required. Great for pharma, biotech, and food & beverage applications.
Pharma Grade PBT Cartridges
High-temperature and chemical resistance. Suitable for WFI, pure steam, and ozone-sanitized systems.
Final Recommendations
A well-chosen end cap enhances sealing, extends service life, and ensures process integrity. LOONG Filtration offers not only standard and custom end cap configurations but also full technical support to help you optimize your filtration system.
