Wholesale polyester dust extraction filter cartridge Factory

Polyester filter cartridges are engineered for high‑volume dust collection systems where consistent airflow and low maintenance are critical. The media is a non‑woven, needle‑punched polyester fabric that balances tensile strength with permeability. This combination supports extended service life in abrasive environments while maintaining stable pressure drop across the filter surface.

Material Composition

The base media consists of 100 % polyester fibers with a nominal denier of 15 µm and a basis weight ranging from 150 g/m² to 250 g/m² depending on the required efficiency. Fibers are thermally bonded to prevent migration and ensure dimensional stability under cyclic loading. Surface treatments such as antistatic or hydrophobic finishes can be applied without altering the core filtration characteristics.

Filtration Performance

Typical initial pressure drop for a cartridge with 20 mm pleat height and 8 mm pleat spacing falls between 120 Pa and 180 Pa at a face velocity of 0.5 m/s. Efficiency for particles down to 1 µm reaches 99.7 % in accordance with EN 779:2012 classification M6–F9, while the dust holding capacity exceeds 200 g per square meter of media before the pressure drop doubles.

Typical Specification Table

Construction Design

Cartridges are produced with a helical pleat pattern that maximizes effective filtration area while minimizing media fatigue. The pleats are bonded to a perforated metal core that provides radial support and prevents collapse under high differential pressure. End caps are crimped or welded to the core, creating a sealed assembly that bypasses unfiltered air leakage.

Temperature and Chemical Resistance

Polyester maintains mechanical integrity up to 120 °C in dry air; brief excursions to 150 °C are tolerable if the media is coated with a heat‑stabilizing additive. Resistance to hydrocarbons, solvents, and mild alkaline solutions makes the cartridge suitable for woodworking, metal grinding, and pharmaceutical dust capture. For aggressive acids or oxidizing gases, alternative media such as PTFE‑laminated polyester is recommended.

Typical Applications

Industries select polyester cartridges when the dust is dry, non‑fibrous, and contains moderate levels of oil mist. The media’s low electrostatic charge reduces particle re‑entrainment, which is crucial in environments where fine particulate must be retained to meet workplace exposure limits. The pleated geometry allows high airflow rates without excessive energy consumption, benefiting continuous‑operation systems such as central vacuum networks and automated machining lines.

• Woodworking shops – sawdust and shavings capture

• Metalworking – grinding, sanding, and polishing fumes

• Pharmaceutical powder handling – containment of active ingredients

• Food processing – flour, sugar, and spice dust

• Recycling facilities – plastic pellet and regrind dust

Customization Options

Dimensional parameters such as outer diameter, length, and pleat count can be adjusted to fit existing housings without redesign. Media weight is selected based on the target efficiency and expected dust load, while end‑cap material is chosen to match the chemical compatibility of the process gas. Additional features include conductive grounding wires, antistatic coatings, and specialized gaskets for high‑vibration environments.

• Outer diameter: 100 mm – 325 mm

• Length: 250 mm – 1500 mm

• Pleat density: 5‑15 pleats per 25 mm

• End cap: galvanized steel, 304 stainless, ABS

• Media treatments: antistatic, hydrophobic, flame retardant

Quality Assurance

Each cartridge undergoes a three‑stage inspection: visual verification of pleat uniformity, dimensional check of outer diameter and length using calibrated gauges, and integrity testing with a calibrated aerosol challenge to confirm penetration limits. Batch records retain raw material certificates, pleat depth measurements, and pressure‑drop curves for traceability. Statistical process control ensures that variability in media weight stays within ±5 % of the target specification.

Packaging and Logistics

Finished cartridges are packed in single‑wall corrugated cartons with internal dividers to prevent movement during transit. Each carton is labeled with part number, quantity, and a QR code linking to the inspection report. For overseas shipments, cartons are placed on heat‑treated pallets and wrapped in stretch film to protect against moisture and mechanical shock. Lead times typically range from 10 to 20 working days after receipt of approved drawings, depending on order volume and customization complexity.

Frequently Asked Questions

Can dimensions be customized to fit existing filter housings?

Yes. Outer diameter, length, and pleat geometry are adjusted according to the housing interface drawings provided by the customer. Tolerances are held to ±0.5 mm for diameter and ±2 mm for length to ensure proper sealing.

What information is required before a quotation can be issued?

Required data include the desired filtration efficiency (e.g., M6, F7, F9), operating airflow rate, maximum temperature, chemical exposure details, and any mechanical constraints such as housing diameter or end‑cap type. A sketch or CAD file of the housing accelerates the quoting process.

Which media options are available for high‑temperature applications?

Standard polyester is rated to 120 °C continuous. For temperatures up to 180 °C, a polyester‑PTFE composite laminate can be supplied. Details on thermal endurance and compatibility are provided upon request.

How is quality inspected before shipment?

Each lot undergoes visual inspection, dimensional verification, and aerosol challenge testing per ISO 16890. Results are documented in a test report that accompanies the shipment.

Contact for a Technical Quote

To discuss your dust extraction requirements, provide the operating parameters and housing specifications. Our engineering team will return a detailed proposal including media selection, pleat geometry, and lead time within two business days.