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The Thesvin gel seal HEPA & ULPA filter is a high-efficiency panel filter that uses a continuous gel seal to prevent air bypass in critical cleanrooms and equipment. It captures airborne particles at H12 through U15 efficiency grades and is designed for semiconductor fabs, pharmaceutical cleanrooms, hospital operating rooms, FFU systems and high-standard paint lines. The filter is available in top-gel and side-gel configurations to match your existing housing.
The gel seal is the critical interface: the filter frame seats into a knife-edge groove filled with polyurethane gel, creating a continuous, gasket-free seal along the entire perimeter. This design eliminates the need for compression bolts and tolerates vibration and temperature cycling better than traditional EPDM gaskets. Thesvin offers two mounting styles: top-gel (gel channel on the top face of the frame, for units where the filter drops into a ceiling grid or FFU housing) and side-gel (gel channel on the side of the frame, for side-loading housings). Both styles use an anodised aluminium alloy frame that resists corrosion and maintains dimensional stability under load.
Because the gel seal relies on a precise groove width and depth, the frame dimensions and gel channel geometry must match your housing. Thesvin supplies standard sizes listed in the table below, but can also manufacture to your drawing, including non-standard gel channel widths and frame depths. This is particularly relevant for OEM equipment where the housing is proprietary. If you are replacing an existing filter, sending us the old part or a dimensioned sketch is often the fastest route to a drop-in replacement.
The filter medium is a high-throughput, moisture-resistant ultra-fine glass fibre paper. It is pleated and separated to maximise media area within the frame depth, giving a low pressure drop at rated airflow. The gel seal ensures that all air passing through the unit goes through the media, not around it, which is essential for maintaining ISO Class 1–5 cleanliness in semiconductor wafer fabrication and GMP pharmaceutical production. The filter is rated for H12, H13, H14 (HEPA) and U15 (ULPA) grades according to EN 1822, with filtration efficiency for 0.3 µm particles starting at ≥99.95% for H13 and ≥99.995% for H14. U15 provides even higher efficiency for the most demanding applications. Typical installations include cleanroom ceilings, FFU fan filter units, biological safety cabinets, hospital operating theatres and high-spec paint booths.
| Item | Detail |
|---|---|
| Product name | Gel Seal HEPA & ULPA Filter |
| Filter class (EN 1822) | H12 / H13 / H14 (HEPA) / U15 (ULPA) |
| Filter medium | High-throughput, moisture-resistant ultra-fine glass fibre |
| Frame and seal | Anodised aluminium alloy profile + polyurethane gel sealant |
| Mounting style | Top gel seal / Side gel seal |
| Typical applications | Semiconductor wafer fabs, biopharma GMP cleanrooms, hospital Class 100 operating rooms, FFU units, high-standard paint lines |
| Standard sizes and rated airflow (W×H×D) | Side gel, 50 mm depth: 610×610×50 mm (1000 m³/h); 1170×570×50 mm (1800 m³/h). Top gel, 70 mm depth: 610×610×70 mm (750 m³/h); 1170×570×70 mm (1300 m³/h). Maximum airflow up to 3600 m³/h. |
| Customisation (OEM/ODM) | Non-standard sizes, gel channel widths and airflow requirements supported. 50,000 m² production facility and CNAS-accredited testing centre. ISO/IATF16949 certified. |
Thesvin is certified to IATF 16949 (2024) and ISO 9001, ISO 14001 and ISO 45001. Dimensional consistency is controlled through IQC, IPQC and OQC at every production stage: incoming inspection of aluminium profiles and glass fibre media, in-process checks of gel channel dimensions and pleat spacing, and outgoing inspection of frame squareness and seal integrity. Our CNAS-accredited laboratory can issue test reports for filtration efficiency, dust holding capacity and pressure drop. The 50,000 m² manufacturing facility includes six cleanrooms totalling 20,000 m², where gel seal filters are assembled under controlled conditions. Products comply with REACH and RoHS, and we can provide compliance documentation on request.
To receive a quotation, please provide: your device or vehicle model (if applicable), the filter size or a drawing, the required airflow or water flow, operating conditions (temperature, humidity, contaminants), and the quantity you need. If you are unsure of the specifications, send us the old filter or a photo with dimensions. Our team will respond with a tailored proposal. Contact us to get started.
It depends on the gel seal interface. Thesvin gel seal filters are available in top-gel and side-gel configurations with standard sizes such as 610×610×50 mm (side) and 610×610×70 mm (top). To confirm fit, compare your housing's knife-edge groove width and depth with our drawing, or send us the old filter for matching. We also produce custom sizes and gel channel profiles.
Yes. Sending the old filter is often the most reliable way to ensure a drop-in replacement, especially for OEM equipment. We will measure the frame, gel channel and media depth, then confirm the specification with you before quoting. This service is available for both standard and custom orders.
Thesvin gel seal filters are offered in H12, H13, H14 (HEPA) and U15 (ULPA) grades according to EN 1822. For example, H13 provides ≥99.95% efficiency for 0.3 µm particles, and H14 provides ≥99.995%. U15 is available for higher cleanliness requirements. Each filter is tested and supplied with a test report.
For standard sizes, MOQ is typically 10–50 units. Custom sizes are quoted on a case-by-case basis. Standard lead time is 15–25 days, and large orders may take 30–45 days. Rush orders can be accommodated upon request. Samples are usually delivered within 7–10 days.
Yes, we support paid samples or small trial batches so you can verify fit and performance on your equipment. Samples are typically ready within 7–10 days. Please provide your housing dimensions or old part to ensure the sample matches your interface.
Under normal conditions with G4 pre-filters and F8 secondary filters, the recommended replacement interval is 3–5 years. Monitor the pressure drop: when it reaches twice the initial resistance or the design final resistance (typically 450–600 Pa), the filter should be changed. Actual life depends on air quality and operating hours.
Yes. Thesvin offers OEM/ODM customisation including non-standard frame dimensions, gel channel widths, frame depths and airflow ratings. Our engineering team can work from your drawing or a sample. With over 1,000 filter solutions developed, we can adapt the design to your housing requirements.
Thesvin holds IATF 16949 (2024), ISO 9001, ISO 14001 and ISO 45001 certifications. Our CNAS-accredited laboratory performs efficiency, pressure drop and dust holding tests. Production follows IQC, IPQC and OQC checks to ensure dimensional consistency and seal integrity. Products comply with REACH and RoHS.