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Help Center20-Inch 50 Micron Cotton String Wound Filter Cartridge 1.5 Bar Delta P High Dirt Holding Capacity
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As a trusted manufacturer since 1998, Anping County Boli Hardware Wiremesh Products Factory is proud to introduce our 20-Inch 50 Micron Cotton String Wound Filter Cartridge, engineered for demanding industrial filtration applications. With an annual export value exceeding US$5 Million and a global footprint spanning North America, Europe, Asia, and beyond, we deliver consistent quality and performance. This cartridge features a maximum delta P of 1.5 Bar and exceptional dirt holding capacity, making it a reliable choice for pre-filtration, sediment removal, and process water treatment.
Crafted from high-grade natural cotton fibers, our wound filter cartridges are designed to trap particles efficiently while maintaining low pressure drop. The 50 micron nominal rating ensures effective removal of sand, silt, rust, and other suspended solids, protecting downstream equipment such as RO membranes, pumps, and valves. The 20-inch length provides a large surface area, extending service life and reducing replacement frequency.
Key Features & Benefits:
- High Dirt Holding Capacity: Up to 1000 g/m² of contaminant retention, minimizing downtime and cartridge change-outs.
- 1.5 Bar Delta P Resistance: Robust construction withstands pressure differentials without collapsing or channeling.
- Natural Cotton Material: Food-grade, biodegradable, and compatible with a wide range of liquids (water, solvents, chemicals).
- Deep Graded Density: Wound layer structure captures particles throughout the depth, not just on the surface.
- Customizable Options: Available with polypropylene core, various end cap configurations, and different winding patterns.
- Global Compatibility: Standard 20-inch length fits most industry housings (e.g., 2.5-inch OD, 1-inch ID).
Technical Specifications:
| Parameter | Value |
| Length | 20 inches (508 mm) |
| Outer Diameter | 2.5 inches (63 mm) |
| Inner Diameter | 1.0 inch (25 mm) – standard |
| Micron Rating | 50 microns nominal |
| Maximum Delta P | 1.5 Bar (21.7 psi) |
| Maximum Operating Temperature | 50°C (122°F) – cotton; higher with optional core |
| Flow Rate (typical) | 10–15 L/min per cartridge (at 0.5 Bar ΔP) |
| Dirt Holding Capacity | ≥ 800 g/m² (tested with ISO 12103-1 A2 fine dust) |
Application Advantages:
- Water Treatment: Ideal for well water, municipal water, and cooling tower pre-filtration.
- Industrial Processes: Used in chemical, food & beverage, and pharmaceutical industries for particle removal.
- RO Pre-treatment: Protects reverse osmosis membranes from fouling, extending membrane life by up to 30%.
- Swimming Pools & Aquariums: Removes suspended solids without affecting water chemistry.
Our factory in Hengshui, Hebei, China has been a dedicated manufacturer since 1998, with annual exports reaching US$5-10 million. We serve clients across North America, South America, Europe, Southeast Asia, Africa, Oceania, the Middle East, and the domestic Chinese market. All cartridges are produced under strict quality control, and we offer flexible customization (core material, end caps, packaging) to meet specific OEM requirements. Shipping from Tianjin, Qingdao, or Shanghai ensures timely delivery to global destinations.
We are confident that our 20-Inch 50 Micron Cotton String Wound Filter Cartridge will exceed your expectations in terms of dirt holding capacity, pressure resistance, and cost-effectiveness. Contact us today for a quotation, sample request, or technical consultation. Let us be your long-term partner in filtration solutions.
Frequently Asked Questions (FAQ):
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Q: What is the recommended replacement interval for this cartridge?
A: It depends on the influent water quality. Under typical sediment loads (50–100 NTU), the cartridge can last 3–6 months. The high dirt holding capacity (≥800 g/m²) extends service life compared to standard wound filters. -
Q: Can this cartridge be used with hot water above 50°C?
A: The cotton material is limited to 50°C. For higher temperatures, we recommend a polypropylene or polyester core option. Please consult our sales team for custom solutions. -
Q: How does the 1.5 Bar delta P affect performance?
A: The cartridge is designed to withstand up to 1.5 Bar pressure drop without structural collapse. This allows operation at higher flow rates or when heavily loaded with dirt, ensuring consistent filtration. -
Q: Is this cartridge suitable for food-grade applications?
A: Yes, the cotton used is natural and food-grade. However, we recommend confirming with your local regulations. End caps can be made of food-grade plastic if required. -
Q: What is the difference between string wound and melt-blown cartridges?
A: String wound cartridges have a graded density structure that captures particles throughout the depth, offering higher dirt holding capacity. Melt-blown cartridges are more uniform but may clog faster. -
Q: Can I order custom lengths or micron ratings?
A: Absolutely. We offer customization for length (10”, 20”, 30”, 40”, etc.), micron ratings (1–100 microns), and core materials. Minimum order quantity may apply. -
Q: How is the cartridge packaged for shipping?
A: Each cartridge is individually wrapped in polybags and then packed in corrugated boxes or pallets. We can also provide OEM packaging with your logo. -
Q: What is the typical lead time for bulk orders?
A: Lead time is 7–15 days for standard sizes, depending on quantity. For custom orders, please allow 15–25 days. We ship from Tianjin, Qingdao, or Shanghai.
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