Folded Filter Cartridges for Dust Separators

Product Overview

Folded filter cartridges are engineered to increase surface area while maintaining a compact cylindrical form, which improves dust capture efficiency in cyclone and baghouse separators. The pleated geometry allows higher airflow rates without excessive pressure drop, extending service life compared to smooth‑wall cartridges. These components are commonly supplied to OEMs that integrate dust separation units into metalworking, wood processing, and pharmaceutical production lines.

Key Design Features

• Pleat height ranging from 20 mm to 50 mm, selected based on required filtration area.
• Uniform pleat spacing ensures consistent dust loading across the cartridge surface.
• End caps fabricated from stainless steel or reinforced polypropylene for secure sealing.
• Optional anti‑static coating to mitigate explosion hazards in fine‑powder applications.

Material Options

Performance Characteristics

The pressure drop across a clean folded cartridge typically ranges from 0.5 kPa to 1.2 kPa at a face velocity of 0.5 m/s, depending on pleat height and media density. Dust holding capacity can exceed 2 kg/m² of filter surface before a 50 % increase in pressure drop is observed, allowing extended operation between change‑outs. Filtration efficiency for particles down to 1 µm is generally above 95 % when using polyester or polypropylene media, verified by ISO 16890 testing protocols.

Typical Applications

In metalworking shops, folded cartridges capture fine metal oxides and grinding swarf that would otherwise clog conventional bag filters, thereby reducing maintenance frequency. Woodworking facilities benefit from the cartridges’ ability to handle high volumes of lightweight sawdust while maintaining low pressure drop, which preserves fan energy consumption. Pharmaceutical manufacturers select PTFE‑coated variants to contain potent active powder streams without risk of media degradation or contamination.

The modular design permits easy retrofitting into existing separator housings, often requiring only a change of the fastening clamp set.

Quality Assurance & Testing

Each cartridge undergoes dimensional verification of pleat height, end‑cap squareness, and media weight per square meter. Burst strength is measured using a pneumatic test rig to confirm that the cartridge can withstand at least 1.5 times the expected operating pressure without seam failure. Media integrity is checked via aerosol challenge tests to ensure no breakthrough beyond the specified efficiency threshold.

Documentation includes material certificates, test reports, and traceability labels affixed to every unit.

Customization Options

Pleat geometry, media type, end‑cap material, and overall length can be tailored to match specific separator housings and process conditions. Clients frequently request custom flange patterns or integrated gasket grooves to simplify installation. For environments with explosive dust concentrations, anti‑static or conductive media layers are available upon request.

Engineering support is provided to calculate the optimal pleat count and media density based on supplied airflow, dust loading, and target pressure drop limits.

Ordering Information & Lead Times

Standard cartridges are offered in lengths from 250 mm to 1500 mm with incremental steps of 50 mm. Minimum order quantity is typically five units per size/media combination. Production lead time for stocked configurations is two to three weeks; customized designs require four to six weeks after approval of drawings and material samples.

Packaging options include individual polyethylene sleeves, corrugated cartons with corner protectors, or palletized bulk packing for overseas shipments, all designed to prevent media deformation during transit.

Frequently Asked Questions

• Can dimensions be customized? Yes, length, outer diameter, and pleat height can be adjusted to suit specific housings.
• What information is required before quotation? Required data include airflow rate, dust type, operating temperature, pressure drop limit, and any chemical exposure details.
• What materials are available? See the Material Options table; additional grades such as conductive polyester or PTFE‑laminated blends are offered upon request.
• How is quality inspected? Each batch undergoes dimensional checks, burst testing, and aerosol challenge analysis as described in the Quality Assurance section.
• What packaging methods are available? Standard packaging includes sleeved units in cartons; palletized bulk packing is available for large orders.
• How are export shipments protected? Units are packed with moisture‑barrier liners and shock‑absorbent foam to prevent media damage during transit.
• What is the typical production lead time? Stock items ship within 2–3 weeks; custom builds typically require 4–6 weeks.
• How are samples arranged? Sample units can be dispatched after receipt of a signed NDA and specification sheet; shipping costs are borne by the requester.

Contact Us for Technical Inquiry

To discuss your dust separation requirements, request a quotation, or obtain CAD models of our folded filter cartridges, please reach out via the contact form or email.

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