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Help CenterIndustrial Needle Felt Filter Bag for Liquids, 100% Leak Tested, Durable, 50 Micron, 1 Year Warranty
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Anping County Boli Hardware Wiremesh Products Factory, a trusted manufacturer since 1998, proudly presents our Industrial Needle Felt Filter Bag for Liquids. Designed for rigorous industrial filtration, this 50 micron filter bag undergoes 100% leak testing to ensure reliability and zero bypass. With a durable needle felt construction and a 1-year warranty, it offers exceptional value for liquid filtration applications across diverse industries.
Our filter bags are engineered to deliver consistent performance, reducing downtime and maintenance costs. Each bag is meticulously crafted to meet the demands of high-flow liquid filtration, making it an ideal choice for manufacturers, chemical plants, and water treatment facilities. The combination of fine filtration precision and robust material guarantees long service life and customer satisfaction.
Key Features & Benefits
- 100% Leak Tested – Every bag is individually pressure-tested to ensure no leakage, providing peace of mind in critical applications.
- 50 Micron Filtration – Captures particles down to 50 microns, suitable for fine filtration of liquids such as water, oils, coolants, and chemicals.
- Durable Needle Felt Material – Made from high-quality needle felt (polyester or polypropylene), offering excellent strength, abrasion resistance, and chemical compatibility.
- 1-Year Warranty – Backed by a comprehensive warranty against manufacturing defects, demonstrating our commitment to quality.
- Customizable Sizes & Options – Available in various dimensions, ring types, and bottom styles to fit standard filter housings or custom requirements.
- High Flow Rate – The needle felt structure provides high dirt-holding capacity and low pressure drop, maximizing filtration efficiency.
Technical Specifications
| Parameter | Details |
| Filtration Precision | 50 Micron (nominal) |
| Material | Needle Felt (Polyester / Polypropylene, customizable) |
| Operating Temperature | Up to 150°C (302°F) for polyester; up to 90°C (194°F) for polypropylene |
| Leak Test | 100% individual pressure test |
| Warranty | 1 Year |
| Available Sizes | Standard: 4"x14", 4"x20", 6"x24", 7"x32" ; Custom sizes upon request |
| Closure Options | Ring (plastic or metal), Snap Band, or Plain (sewn) – customizable |
Why Choose Our Filter Bags?
- Rigorous Quality Control – Each bag is 100% leak tested and visually inspected before packing.
- Cost-Effective – High dirt-holding capacity reduces replacement frequency, lowering overall operating costs.
- Versatile Compatibility – Fits most standard filter housings; OEM sizes available.
- Expert Manufacturing – Over 25 years of experience in filtration products ensures consistent quality.
- Global Logistics – Ship from Tianjin, Qingdao, Shanghai, or Foshan ports, with flexible delivery options.
Our filter bags are widely used in water treatment, chemical processing, food & beverage, pharmaceuticals, metalworking (coolants), and automotive industries. They effectively remove suspended solids, sediments, and contaminants, ensuring product purity and equipment protection.
For example, in a typical paint manufacturing line, our 50 micron needle felt bags can capture fine pigments and impurities, improving final product clarity. In machining operations, they prolong coolant life by filtering out metal chips and sludge.
Trusted by Global Markets
With an annual export value of US$5–10 million, Anping County Boli Hardware Wiremesh Products Factory serves clients across North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, and beyond. Our products are trusted by distributors and end-users worldwide for their reliability and performance.
We are committed to continuous improvement and customer satisfaction. Every filter bag is manufactured in our Hebei, China facility using advanced needling and sewing technology. Our team can also provide custom filtration solutions tailored to your specific liquid and process requirements.
Contact us today to request samples, discuss your filtration needs, or place a bulk order. Experience the difference of a 100% leak-tested, durable filter bag backed by a 1-year warranty and decades of manufacturing expertise.
Frequently Asked Questions
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Q: What liquids can this filter bag be used for?
A: It is suitable for a wide range of liquids including water, oil, coolants, solvents, chemicals, and food-grade liquids. Always check material compatibility with your specific fluid. -
Q: Is the 50 micron rating absolute or nominal?
A: It is a nominal rating. For absolute filtration requirements, please contact us for custom options. -
Q: Can I get the bag in a different micron size?
A: Yes, we offer customizable micron ratings from 1 micron to 200 microns. Please specify your requirement. -
Q: How do I know the right size for my filter housing?
A: Measure the length, diameter, and ring type of your current bag. We can match standard sizes or produce custom dimensions. -
Q: What is the maximum operating temperature?
A: For polyester needle felt, up to 150°C (302°F); for polypropylene, up to 90°C (194°F). Higher temperature materials are available on request. -
Q: Are these bags reusable after cleaning?
A: Some customers clean and reuse them, but it depends on the application. Typically, disposable bags are recommended for consistent filtration. We can advise on reuse options. -
Q: What is the minimum order quantity (MOQ)?
A: Standard sizes have no MOQ for samples. For bulk orders, MOQ is typically 100 pcs per size, but we can be flexible. -
Q: How long does shipping take?
A: Delivery time depends on quantity and destination. Generally, 7–15 days for samples, 20–35 days for bulk orders from our ports.
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