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Help CenterStandard 2.5 Inch OD Cotton Wound Filter Cartridge 10 Micron 1/4 NPT for Boiler Feed Water
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Welcome to Anping County Boli Hardware Wiremesh Products Factory, a trusted manufacturer since 1998 with an annual export value of US$5 Million–US$10 Million. Our Standard 2.5 Inch OD Cotton Wound Filter Cartridge 10 Micron 1/4 NPT for Boiler Feed Water is designed to deliver reliable, deep filtration for boiler feed systems, protecting downstream equipment from scale, rust, and suspended solids. With decades of experience and global shipping from Tianjin, Qingdao, and Shanghai, we bring you a cost-effective solution that combines durability with high dirt-holding capacity.
This cotton wound cartridge features a graded density structure that traps particles throughout the depth of the media, not just on the surface. The 10 micron rating ensures fine filtration while maintaining excellent flow rates. The 1/4 NPT connection fits standard housings, and the 2.5 inch outer diameter is compatible with most industry-standard filter vessels. Whether you are treating boiler feed water or other process fluids, this cartridge offers consistent performance and easy replacement.
Key Features & Technical Specifications
- Deep Filtration: Cotton wound fibers create a tortuous path, capturing particles as small as 10 microns throughout the entire depth.
- High Dirt-Holding Capacity: The graduated density design allows the cartridge to hold more contaminants than surface-type filters, extending service life.
- Chemical Compatibility: Cotton is resistant to most acids, alkalis, and organic solvents under normal operating conditions.
- Temperature & Pressure Tolerance: Suitable for continuous use up to 180°F (82°C) and 150 psi (10.3 bar) – customizable upon request.
- Standard Dimensions: Outer diameter 2.5 inches (63.5 mm), available in standard lengths of 10, 20, 30, or 40 inches with 1/4 NPT female threads.
- Versatile Applications: Boiler feed water, pre-filtration for RO systems, cooling water, chemical processing, and more.
| Parameter | Value |
| Outer Diameter | 2.5 inch (63.5 mm) |
| Micron Rating | 10 µm nominal |
| Connection | 1/4 NPT (female) |
| Filtration Media | 100% Cotton Wound |
| Core Material | Polypropylene (standard) / Stainless Steel (optional) |
| Max Operating Temperature | 180°F (82°C) |
| Max Operating Pressure | 150 psi (10.3 bar) |
| Length Options | 10, 20, 30, 40 inches (customizable) |
Why Choose Our Cotton Wound Cartridge for Boiler Feed Water?
Boiler feed water must be free of suspended solids to prevent scale buildup, corrosion, and efficiency loss. Our 10 micron cotton wound cartridge provides an excellent balance of filtration fineness and flow capacity. The natural cotton fibers are biodegradable and offer low extractables, making them suitable for many industrial applications. The 1/4 NPT thread ensures a secure, leak-free connection to standard housings, while the 2.5 inch OD fits most filter vessels without adapter rings.
Compared to pleated or melt-blown filters, the cotton wound design offers a higher dirt-holding capacity and longer service intervals, reducing downtime and replacement costs. The gradient density structure means that larger particles are trapped in the outer layers, while finer particles are captured deeper inside, maximizing the usable life of the cartridge.
For boiler feed water, we recommend pairing this cartridge with a pre-filter (e.g., 50 micron) to extend its life, and a post-filter (e.g., 5 micron) for critical applications. Our factory can customize the length, core material, and end cap types to match your specific housing requirements.
Trusted Manufacturer with Global Reach
Anping County Boli Hardware Wiremesh Products Factory has been serving customers worldwide since 1998. With annual export value exceeding US$5 Million and shipping ports in Tianjin, Qingdao, and Shanghai, we ensure timely delivery to North America, South America, Europe, Africa, Asia, and Oceania. Our factory operates under strict quality control procedures, and each cartridge is inspected before packaging. We do not claim specific certifications not provided, but we adhere to industry standards for consistency and performance.
Our team is ready to support you with technical advice, customized solutions, and competitive pricing. Whether you need a small trial order or bulk container shipment, we can accommodate your requirements. Over the years, we have built long-term partnerships with clients in the power generation, petrochemical, food & beverage, and pharmaceutical industries.
Contact us today to discuss your filtration needs. Our Standard 2.5 Inch OD Cotton Wound Filter Cartridge 10 Micron 1/4 NPT is in stock for immediate shipment, and we can also produce non-standard sizes upon request. Let us help you protect your boiler investment with reliable, cost-effective filtration.
Frequently Asked Questions
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Q: What is the maximum temperature this cartridge can withstand?
A: The standard cotton wound cartridge can handle continuous operating temperatures up to 180°F (82°C). For higher temperature applications, we can provide cartridges with a PP or stainless steel core and special winding. -
Q: Can I use this cartridge for other liquids besides boiler feed water?
A: Yes, it is suitable for many applications such as coolant filtration, RO pre-filtration, chemical processing, and general industrial water treatment. Always check chemical compatibility with your specific fluid. -
Q: Does the 1/4 NPT connection fit standard filter housings?
A: Most common filter housings with 1/4 NPT female ports are compatible. If your housing uses a different thread (e.g., 1/2 NPT, 3/4 NPT), please let us know and we can customize the end cap. -
Q: How often should I replace the cartridge?
A: Replacement frequency depends on water quality and usage. Typically, when the pressure drop across the cartridge reaches 15-20 psi (1-1.4 bar), it should be changed. For boiler feed water, we recommend periodic inspection every 3-6 months. -
Q: Can I get a custom length or outer diameter?
A: Yes, we offer customization on length (up to 60 inches), outer diameter (2.5 or 4.5 inch), and end cap types. Minimum order quantities may apply for non-standard sizes. -
Q: Is this cartridge reusable or washable?
A: Cotton wound cartridges are designed for single use and cannot be effectively cleaned. They should be replaced when saturated. The high dirt-holding capacity provides good service life for disposable use. -
Q: Do you have any certifications?
A: We maintain strict quality control but do not hold specific third-party certifications such as ISO or NSF. However, we can provide material certificates and test reports upon request to verify compliance with your requirements. -
Q: What is the typical lead time for shipment?
A: For standard sizes, we can ship within 7-15 days after order confirmation. Custom orders may take 15-30 days depending on specifications. We ship from Tianjin, Qingdao, and Shanghai ports.
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