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The Thesvin cylindrical HEPA filter is a 360-degree pleated cartridge designed for air purifiers, fresh-air systems, vehicle cabins and vacuum cleaners. It captures fine dust and allergens, and can be built to medium-efficiency through HEPA grades according to your device requirements. It is intended for appliance makers and system integrators who need a filter that fits an existing housing without redesigning the unit.
This filter is built around the cavity it has to sit in. The cylindrical format means the pleat pack is wrapped around a central core, so the outer diameter and overall height are the two dimensions that decide whether the part drops into the housing or binds against it. Thesvin manufactures to your drawing or existing part, so both dimensions can be set to your purifier chamber rather than to a catalogue size.
The 360-degree intake layout lets air pass through the full circumference, which supports a higher clean-air delivery rate for the same footprint. At the interface, the filter can be combined with a pre-filter screen on the outer face or an activated carbon layer on the inner or outer side, depending on how your housing routes air and where you want coarse dust or odour control to sit in the sequence. This is a structural choice, not an accessory: the layer order affects pressure drop and service access, so it is agreed at the drawing stage.
Because the part is made to order, the frame, end caps and overall geometry follow the host device. If you are replacing an existing cartridge, the old part itself can serve as the dimensional reference. That approach is usually faster than reconstructing a drawing for a housing that was never documented, and it keeps the fit tolerances tied to a physical sample.
The filter media are high-flux PP (polypropylene), PP+PET composite nonwoven and PTFE (polytetrafluoroethylene). Depending on the grade selected, the cartridge removes airborne fine dust and allergens, and the efficiency level is set to match the end product rather than fixed by the catalogue. Standard builds can cover H11 to H14, with filtration efficiency for 0.3 μm particles reaching up to 99.995% at the upper end of that range.
Typical applications are household air purifiers, commercial fresh-air systems, vehicle air purifiers and high-end vacuum cleaners. The same cylindrical construction can also be specified for industrial dust removal and clean-space equipment where a compact, full-circumference filter is preferred. Where odour or formaldehyde control is required, an activated carbon layer can be integrated into the same cartridge so that particle and gas filtration share one housing.
| Item | Detail |
|---|---|
| Product name | Cylindrical HEPA Filter for air purifiers |
| Core materials | High-flux PP (polypropylene), PP+PET composite nonwoven, PTFE (polytetrafluoroethylene) |
| Filtration performance | Medium-efficiency to HEPA grades, customised to the end product; removes airborne fine dust and allergens |
| Structure | 360-degree cylindrical design; inner and outer layers can be combined with a pre-filter screen or activated carbon layer as required |
| Dimensions | Fully customised to non-standard sizes; any diameter and height can be produced to suit the purifier cavity |
| Core applications | Household air purifiers, commercial fresh-air systems, vehicle air purifiers, high-end vacuum cleaners and similar environmental purification appliances |
| Certifications | ISO 9001, ISO 14001 and ISO 45001 system certification; US EPA and European BSCI; supplied directly from an IATF 16949 certified factory |
The table lists the parameters that are fixed for this product family. Efficiency grade, pressure drop, dust holding capacity and airflow are set per project once the housing and target performance are known, and the CNAS-accredited laboratory can issue test reports for efficiency, dust holding capacity and resistance.
Thesvin holds IATF 16949 certification, obtained in 2024, alongside ISO 9001, ISO 14001 and ISO 45001. Dimensional consistency is controlled through IQC for incoming materials, IPQC during production and OQC before shipment, which matters for a filter that has to seat in a moulded housing without play. The in-house laboratory is CNAS-accredited and can issue reports on filtration efficiency, dust holding capacity and resistance.
Production runs in a 50,000 m² facility, of which six clean workshops total 20,000 m². The company has more than 20 years of filtration development and manufacturing experience, exports to Europe, the United States, Japan and Korea, and has developed more than 1,000 filtration solutions. OEM and ODM work covers dimensions, structure, media grade, frame material, logo and packaging. Products meet REACH and RoHS requirements and compliance documents can be supplied. The plant is located in Zhongshan, Guangdong, China.
To get a quotation, send the device or vehicle model, the required size or a drawing, the airflow or water flow, the operating conditions and the quantity you expect to order. A photo of the old part with a ruler alongside it is often enough to start. Go to /en/contact and attach what you have; the team will confirm fit and performance direction before quoting.
Fit is set by the cavity diameter and height, and Thesvin produces any diameter and height to suit the purifier chamber. If you send the device model, a drawing or the old part, the cartridge is built to those dimensions rather than to a standard size. The 360-degree cylindrical layout then seats around the intake as your housing requires.
Yes. An existing cartridge is a practical dimensional reference, and a photo with a ruler alongside it can be enough to start. The team will confirm the interface and propose the media and layer build before sampling. This is often faster than reconstructing a drawing for an undocumented housing.
Standard builds cover H11 to H14. At the upper end, filtration efficiency for 0.3 μm particles reaches up to 99.995%. The exact grade is selected against your end product and can be verified at the CNAS-accredited laboratory, which issues reports on efficiency, dust holding capacity and resistance.
Yes. Media can be high-flux PP, PP+PET composite nonwoven or PTFE, and the structure can combine a pre-filter screen or an activated carbon layer on the inner or outer face. Frame and end-cap details, logo and packaging are part of OEM and ODM work. All of this is agreed at the drawing stage because layer order affects pressure drop.
Send the device model, size or drawing, airflow, operating conditions and expected quantity to /en/contact. The team confirms fit and performance direction, then quotes and arranges a sample for verification. Sample and freight terms are discussed with the quotation, and the sample is approved before batch production.
The MOQ for the standard cylindrical HEPA filter is typically 1,000 pcs; customised versions are quoted according to tooling complexity. Existing-specification samples ship in 3–5 working days, custom tooled samples usually take 15–25 working days, and batch orders generally run 25–35 days. Peak-season orders are best placed early.
In normal household or commercial use, a replacement interval of 6–12 months is recommended. In high-load industrial environments, replacement should follow pressure-drop monitoring. Thesvin can provide dust holding capacity data and life assessment for your application so the end brand can set a suitable replacement reminder.
It is used in household air purifiers, commercial fresh-air systems, vehicle air purifiers, high-end vacuum cleaners and similar environmental purification appliances. It can also be specified for industrial dust removal and clean-space equipment. Where odour control is needed, an activated carbon layer can be integrated into the same cartridge. Send your application details through /en/contact for a fit check.