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Home > Industrial Equipment & Components > Filtration Equipment & Parts > Filter Bag & Cartridge > Polyester Needle-Punched Filter Bag for Liquid Filtration, 1 Micron Absolute, 250mm Diameter

Polyester Needle-Punched Filter Bag for Liquid Filtration, 1 Micron Absolute, 250mm Diameter

Polyester Needle-Punched Filter Bag for Liquid Filtration, 1 Micron Absolute, 250mm Diameter thumbnail-3

Polyester Needle-Punched Filter Bag for Liquid Filtration, 1 Micron Absolute, 250mm Diameter thumbnail-4

Polyester Needle-Punched Filter Bag for Liquid Filtration, 1 Micron Absolute, 250mm Diameter thumbnail-5

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Polyester Needle-Punched Filter Bag for Liquid Filtration, 1 Micron Absolute, 250mm Diameter photo-4

Polyester Needle-Punched Filter Bag for Liquid Filtration, 1 Micron Absolute, 250mm Diameter photo-5

Product Spotlights

Our polyester needle-punched filter bag offers 1 micron absolute filtration with high dirt holding capacity and low pressure drop. Customizable size and ring options, durable construction, and cost-effective performance make it ideal for water, chemical, food, and industrial liquid filtration. Backed by 25+ years of manufacturing expertise.

Negotiable MOQ: 1 Piece (Price negotiable depending on order volume and customization)

Key Specifications

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Material:

Other, Polyester (100% polyester needle-punched felt)

Filtration Rating:

1 Micron Absolute (99.9% efficiency)

Diameter:

250 mm (9.84 inches)

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Anping County Boli Hardware Wiremesh Products Factory

2Yrs

Payment & Shipping

Payment Methods:

Port of Shipment:

tianjin shanghai qingdao

Delivery Detail:

Delivery time depends on order quantity.

Product Details
Company Profile
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Material Other, Polyester (100% polyester needle-punched felt)

Filtration Rating 1 Micron Absolute (99.9% efficiency)

Diameter 250 mm (9.84 inches)

Length Customizable (e.g., 500mm, 800mm, 1000mm, etc.)

Seam Type Double stitched or ultrasonic welded (optional)

Temperature Resistance Up to 150°C (continuous operation)

Application Liquid filtration (water, chemicals, oils, etc.)

Surface Treatment Singed and calendered (optional)

Color White (standard), other colors available upon request

Connection Type Snap ring, plastic ring, or metal ring (optional)

As a leading manufacturer with over 25 years of experience, Anping County Boli Hardware Wiremesh Products Factory specializes in producing high-quality filtration solutions. Our Polyester Needle-Punched Filter Bag for Liquid Filtration is engineered to deliver reliable, high-efficiency solid-liquid separation. With a 1 Micron Absolute rating and a standard 250mm diameter, this filter bag is designed for demanding industrial applications where consistent particle removal is critical. Whether you are filtering water, chemicals, or edible oils, our bags offer excellent depth filtration and long service life.

The needle-punched polyester felt construction provides a dense, uniform fiber matrix that captures particles as small as 1 micron with absolute efficiency. This ensures that your downstream equipment is protected from contamination, and your final product meets the highest purity standards. The bag is available in various lengths and can be customized with different ring types (snap ring, plastic ring, or metal ring) to fit most standard filter housings.

Key Features & Technical Specifications

Material: 100% polyester needle-punched felt – excellent chemical resistance and thermal stability.
Filtration Rating: 1 Micron Absolute – verified by beta ratio testing (βx ≥ 1000).
Diameter: 250 mm (9.84 inches) – standard size, other diameters available upon request.
Length Options: 500 mm, 800 mm, 1000 mm, or custom lengths.
Maximum Operating Temperature: 150°C (300°F) continuous.
Recommended Flow Rate: Up to 20 m³/h per bag (depending on viscosity and particle load).
Surface Finish: Singed and calendered on the outer surface to prevent fiber migration.
Seam Construction: Double stitched with high-strength polyester thread for leak-proof performance.
Ring Options: Stainless steel snap ring, polypropylene ring, or galvanized steel ring – all reusable.

Typical Applications

Industrial Process Water Removal of suspended solids, rust, and scale from cooling towers, boiler feed water, and wastewater.	Chemical Filtration Suitable for acids, alkalis, solvents, and other aggressive chemicals (check compatibility).
Food & Beverage Filtration of edible oils, syrups, juices, and beer to maintain clarity and purity.	Pharmaceutical & Cosmetics Pre-filtration for purified water, lotions, and active ingredients.
Paint & Coatings Removal of agglomerates and contaminants from paints, inks, and varnishes.	Oil & Gas Filtration of hydraulic oils, lubricants, and fuel for equipment protection.

Why Choose Our Filter Bags?

High Dirt Holding Capacity: The needle-punched structure provides a deep filtration matrix, allowing the bag to hold more contaminants before needing replacement.
Low Initial Pressure Drop: Optimized fiber density ensures minimal resistance to flow, reducing energy consumption in pumping systems.
Consistent Quality: Every bag is manufactured in our ISO-controlled facility (available upon request), with strict quality checks on dimensional accuracy, seam strength, and filtration efficiency.
Customizable Options: We offer custom sizes, ring types, and surface treatments (e.g., flame retardant, anti-static) to meet your specific requirements.
Cost-Effective Solution: Our competitive pricing and long service life mean lower total cost of ownership for your filtration system.

At Anping County Boli Hardware Wiremesh Products Factory, we have been serving global customers since 1998. Our annual export value exceeds US$5 million to US$10 million, and we export to major markets worldwide including North America, Europe, Southeast Asia, Africa, and Oceania. We ship from major ports such as Tianjin, Qingdao, Shanghai, and Foshan, ensuring fast and reliable delivery. Our team of experienced engineers and production staff is committed to providing you with the highest quality filtration products and responsive after-sales support.

Whether you need a single sample for testing or a bulk order for your continuous operation, we are ready to assist. Contact us today for a quote, technical datasheet, or free sample. Experience the reliability and performance of our polyester needle-punched filter bags – your trusted partner in liquid filtration.

Frequently Asked Questions

Q: What is the difference between absolute and nominal filtration ratings?
A: Absolute filtration means that the bag is designed to retain 99.9% of particles of the specified size (1 micron) and larger. Nominal ratings typically capture only a percentage (e.g., 85-95%) of the stated size. Our 1 micron absolute rating ensures highly reliable removal.
Q: Can I use this bag for high-temperature applications?
A: Yes, polyester needle-punched felt can withstand continuous operating temperatures up to 150°C (300°F). For higher temperatures, we recommend our polypropylene or Nomex bags, available upon request.
Q: How do I select the correct ring type for my housing?
A: The ring type depends on the design of your filter vessel. Common options include snap ring (for standard housings with a groove), plastic ring (for retrofit), and metal ring (for high-pressure systems). We can provide a compatibility chart or recommend based on your housing model.
Q: What is the typical lifespan of one filter bag?
A: Lifespan varies based on the contaminant load, flow rate, and viscosity of the liquid. Under normal conditions, a bag can last from several days to a few weeks. We recommend monitoring pressure differential; replace when the bag reaches 1.5-2 bar differential pressure.
Q: Do you offer custom sizes other than 250mm diameter?
A: Yes, we can manufacture bags in diameters from 100mm to 500mm and lengths up to 2000mm. Please provide your specific requirements, and we will tailor the product accordingly.
Q: Are these bags washable and reusable?
A: While some polyester bags can be cleaned by backwashing or gentle washing, we recommend them as disposable for absolute filtration. Reuse may compromise the filtration efficiency. For reusable options, consider our polypropylene mesh bags.
Q: What packaging options do you provide for export?
A: Each bag is individually polybagged to keep it clean and dry. Bulk orders are packed in cartons or pallets. We can also provide custom labeling and barcode tags for inventory management.
Q: How can I get a sample to test before placing a large order?
A: We offer free samples for qualified customers (you pay only shipping). Contact our sales team with your details, and we will arrange a sample that matches your housing and filtration requirements.