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Thesvin high efficiency mini-pleat panel filters are frameless HEPA/ULPA filters that capture micron and submicron particles in cleanrooms, FFUs, and critical HVAC systems. They suit semiconductor, pharmaceutical, hospital, and commercial building applications where low resistance and high efficiency matter. With a thin anodised aluminium or stainless steel frame and hot-melt separators, they install where space is tight and airflow must stay high.
Fitment drives performance. Thesvin builds each filter to the host device or duct interface, matching frame depth, face dimensions, and gasket land so the filter seats without bypass. The anodised aluminium or stainless steel frame holds a rigid profile that resists racking during installation and service. Hot-melt adhesive separators keep pleats evenly spaced, so the filter slides into guides and seals against the frame face without pleat collapse.
For FFU and ceiling-grid installations, the 50 mm and 70 mm depth options allow direct drop-in replacement without modifying the housing. The frame edges are clean and square, so gasket contact is continuous. If your unit uses a specific frame profile or requires a particular seal, share the interface dimensions and we will match them. Thesvin also supports non-standard sizes and OEM builds, so the filter can be made to your drawing rather than forcing an adapter.
This filter removes airborne particles down to the micron and submicron range. Media options include high-quality glass fibre and PTFE, with efficiency grades from M6 to U16. That range covers medium-efficiency pre-filtration through ultra-high-efficiency terminal filtration. In semiconductor fabs, the filter protects photolithography tools, wafer handling areas, and cleanroom envelopes. In pharmaceutical plants, it serves GMP cleanrooms and aseptic processing zones. Hospitals use it in operating theatres and critical care spaces.
Commercial HVAC systems use the same platform for high-grade outdoor-air and recirculation filtration, and FFU units rely on it for uniform clean-air delivery. The mini-pleat design packs more media into a shallow frame, which lowers resistance and supports energy savings while maintaining particle interception. Thesvin tests each filter for efficiency and leak integrity so the installed unit performs as specified.
| Item | Detail |
|---|---|
| Product type | High efficiency mini-pleat panel filter (without partition) |
| Core media | High-quality glass fibre / PTFE |
| Frame material | Anodised aluminium profile / stainless steel |
| Separator | High-quality hot-melt adhesive |
| Efficiency grade | M6 – U16 (medium to ultra-high efficiency) |
| Typical applications | Microelectronics and semiconductor cleanrooms, pharmaceutical GMP workshops, hospital operating theatres, high-end commercial HVAC, FFU units |
| Standard sizes and airflow (W × H × D) | 305 × 610 × 50 mm (350 CMH); 610 × 610 × 50 mm (750 CMH); 1170 × 570 × 50 mm (1300 CMH); 1170 × 1170 × 70 mm (3600 CMH). More sizes available with 50 mm or 70 mm depth options. |
| Customisation | Non-standard sizes and OEM service available, supported by 20,000 m² clean workshop and CNAS-accredited testing centre. |
Thesvin operates under IATF 16949 (obtained in 2024) and ISO 9001, ISO 14001, and ISO 45001 management systems. IQC, IPQC, and OQC controls run through incoming material inspection, in-process checks, and final release, with dimensional consistency checked at each stage. The in-house laboratory is CNAS-accredited and issues test reports for efficiency, dust holding, and resistance. Products comply with REACH and RoHS, and compliance documents are available.
The 50,000 m² production base includes six clean workshops totalling 20,000 m², where filters are assembled and packed under controlled conditions. Multiple automated lines support monthly output in the millions of pieces, and more than 1,000 filter solutions have been developed for OEM and ODM customers. Standard sizes typically ship in 7–15 days; custom orders usually take 20–30 days, depending on quantity and specification. Export packaging uses cleanroom-compatible materials to protect the filter in transit. Thesvin has supplied filtration products to Europe, the US, Japan, and Korea for over 20 years, from its base in Zhongshan, Guangdong, China.
To get a quotation, tell us the device or vehicle model, the size or a drawing, the airflow or water flow, the operating conditions, and the quantity. If you do not have a drawing, send a photo of the old part with key dimensions. Contact our team and we will confirm fitment and performance.
Fitment depends on matching the face size, depth, and frame profile to your housing. Thesvin offers standard sizes such as 305 × 610 × 50 mm and 610 × 610 × 50 mm, plus custom sizes on request. Send the dimensions or a photo of your current filter, and we will confirm the interface before you order.
Yes. A photo of the old filter with a few key measurements is often enough for us to identify the frame style and size. If needed, you can send the old part for reference. Our team will map the critical dimensions and propose a matching build.
Thesvin mini-pleat panel filters are available from M6 to U16. This covers medium-efficiency through ultra-high-efficiency filtration, including H13 and H14 grades for cleanroom and FFU use. Each filter is tested for efficiency and leak integrity before release.
Yes. We support non-standard sizes, frame materials, media type, and OEM labelling. Our 20,000 m² clean workshop and CNAS-accredited testing centre support custom builds. Share your drawing or performance requirement, and we will propose a specification.
Send your device or housing model, size or drawing, required airflow, and quantity through our contact page. We will review fitment and provide a quotation. Samples can be arranged for standard or custom configurations after specification review.
Standard sizes typically have an MOQ of 50–100 pieces and ship in 7–15 days. Custom sizes usually start at 100–200 pieces with a 20–30 day lead time, depending on complexity. Urgent orders can be discussed for expedited scheduling.
Under normal conditions with G4 pre-filtration and F8 secondary filtration, replacement is typically every 3–5 years. Actual life depends on dust load, airflow, and final resistance setpoint. We can provide resistance and airflow curves to help you plan change-outs.
Yes. Thesvin high efficiency filters are used in semiconductor and microelectronics cleanrooms, including FFU units and cleanroom envelopes. They are available in H13 to U16 grades and are tested for leak integrity. Contact us with your cleanroom class and airflow requirements.