Cloth Filter Bag

Fabric Filter Bag Manufacturing

Fabric filter bags are high-performance filtration components engineered to prevent the release of dust and particulate matter generated during industrial production. These bags are specifically designed for integration into jet pulse filtration systems, where they are used in combination with filter cages to ensure optimal filtration efficiency and structural stability.

The bags are installed externally over the filter cages, providing enhanced mechanical support and ensuring proper airflow during operation. Jet pulse systems use controlled bursts of compressed air—delivered via pulse valves—to clean the surface of the bags, dislodging accumulated dust without damaging the fabric. This self-cleaning mechanism ensures long-term durability and consistent performance.

Each filter bag is produced in accordance with the technical requirements of the filtration system—such as capacity, height, diameter, and environmental conditions. At Fora Filter, we manufacture custom-sized filter bags and cages tailored precisely to your system’s specifications.

Key Production Considerations

The production of fabric filter bags involves a careful evaluation of several operational parameters:

• Type and model of the filtration system

• Production volume and dust load

• Filtration capacity and system dimensions

• Installation location (indoor/outdoor, vertical/horizontal)

• Operating temperature range

• Dust properties (chemical composition, abrasiveness, humidity)

Based on these factors, appropriate materials are selected to maximize performance and longevity. Commonly used materials include:

• Polyester

• Meta-Aramid (Nomex)

• Antistatic Filter Media

• Polypropylene (PP)

• Polyimide (P84)

All filter bags are custom-engineered to the specific conditions of your facility, eliminating compatibility issues and ensuring optimal system integration.

How Are Fabric Filter Bags Manufactured?

The manufacturing process begins with the transformation of fiber-based raw materials into filter fabric using a needle punching technique. For this reason, these products are commonly referred to as needle felt filter bags.

Once converted to fabric, the material undergoes:

• Hydrophobic treatment for water and oil repellency

• Glazing (gaze finish) on one surface to prevent dust accumulation and ensure smooth airflow

The finished filter fabric is then rolled into spools and sent to the cutting and stitching lines, where it is:

• Cut according to order-specific dimensions

• Stitched using chain-seam machines for high durability

• Completed with a sealed bottom cap and a flexible collar for proper installation onto the filter cage

After final assembly, each filter bag undergoes quality control inspections and is carefully packaged for shipment.

Technical Consultation & Product Selection

Choosing the correct filter bag is essential to maintaining the efficiency, safety, and longevity of your filtration system.

Our experienced engineering team is available to assist you throughout the entire process—from material selection and design optimization to on-site evaluation and system integration. We provide end-to-end support to help you identify the most suitable filter solution based on your production environment and operational goals.

For expert guidance and customized solutions, please don’t hesitate to contact our team at Fora Filter.