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The Thesvin Dust Filter Box (HEPA Grade) is a high-efficiency filter cartridge designed for clinical ventilators, anesthesia machines, industrial respirators, and high-specification air purification equipment. It captures PM0.3 particles at ≥99.99% efficiency and also adsorbs VOCs, making it suitable for medical and industrial users who require both particulate and gas-phase filtration. Thesvin manufactures this filter with custom dimensions to match your device or duct.
Fitment is where this filter box proves its value. Thesvin builds each unit to your drawing, so the outer dimensions, port locations, and frame geometry align with the host device or duct. The housing is injection-molded from non-toxic medical-grade ABS or PC, and the seal is a medical silicone gasket joined by ultrasonic welding. That welded silicone seal maintains a continuous contact line under vibration and repeated mating cycles, which helps prevent bypass leakage at the interface.
The filter box locates positively in the device cradle or duct slot. Because the frame is rigid and the dimensions are held to your tolerances, the cartridge seats without force and stays seated during operation. If you are replacing an existing filter, Thesvin can work from your old part to replicate the interface, including any mounting features, so the new filter drops into the same position.
For OEM programs, Thesvin offers full customization of housing size, shape, and port configuration. The company has developed over 1,000 filtration solutions and can adapt the filter box to your ventilator model, anesthesia circuit, or respirator shell. The goal is a drop-in fit that meets your assembly line requirements and your device's sealing specifications.
The core filtration media combine a high-precision PTFE microporous membrane, glass fiber, and composite activated carbon. This combination delivers two functions in one cartridge: precise removal of PM0.3 particles at ≥99.99% efficiency, and adsorption of volatile organic compounds (VOCs). For ventilator and anesthesia applications, the HEPA layer protects the device's internal components and the patient circuit from dust, pollen, and microbial particles. For industrial respirators and air purification equipment, the carbon layer adds protection against gaseous contaminants.
The filter box is available in HEPA grades H13 and H14, allowing you to select the efficiency level that matches your device's requirements. The PTFE membrane provides a high surface area for particle capture while keeping pressure drop within the device's operating range. The activated carbon is integrated into the same cartridge, so you do not need a separate gas filter in space-constrained installations.
Typical applications include clinical ventilator and anesthesia machine circuits, industrial gas masks and positive-pressure respirators, and high-specification fresh air purification and oxygen generation equipment. Thesvin manufactures this filter under medical goods GMP practices, and the company holds IATF 16949 and ISO 9001, ISO 14001, and ISO 45001 certifications.
| Item | Detail |
|---|---|
| Product name | High-efficiency HEPA filter / ventilator filter cartridge (HEPA Ventilator Filter / Respirator Cartridge) |
| Core filter media | High-precision PTFE (polytetrafluoroethylene microporous membrane) / glass fiber / composite activated carbon |
| Filtration performance | Dual function: precise removal of PM0.3 particles (efficiency ≥ 99.99%) |
| Available grades | HEPA H13 / H14 filter cartridges |
| Main applications | Clinical medical ventilators, anesthesia machine circuits, industrial gas masks/positive-pressure respirators, high-specification fresh air purification and oxygen generation equipment |
| Custom dimensions | Tooling and production fully according to customer drawings; non-toxic medical-grade ABS/PC injection-molded housing; medical silicone ultrasonic-welded sealing ring to ensure no air leakage |
| Certifications | Company has a national-level CNAS testing center for filter efficiency verification; holds medical goods GMP certification, IATF 16949, ISO 14001, and ISO 45001 system certificates |
Thesvin operates a 50,000 m² manufacturing facility in Zhongshan, Guangdong, China, including six cleanrooms totaling 20,000 m². The company has been certified to IATF 16949 since 2024 and holds ISO 9001, ISO 14001, and ISO 45001 certifications. Quality control follows IQC, IPQC, and OQC stages to maintain dimensional consistency from incoming materials to finished filter boxes.
The company's CNAS-accredited laboratory verifies filtration efficiency, resistance, dust holding capacity, and other key parameters. Each batch is tested, and reports can be provided with shipments. Products comply with REACH and RoHS regulations, and compliance documents are available upon request. With over 20 years of experience and exports to Europe, the US, Japan, and South Korea, Thesvin supports OEM/ODM orders with stable lead times and batch traceability.
To receive a quotation for the Thesvin Dust Filter Box (HEPA Grade), please provide the following:
Submit your details through our contact page. Thesvin's engineering team will respond with a tailored proposal and sample options.
Thesvin manufactures each dust filter box to your drawing, so the outer dimensions, port locations, and sealing surface match your device. If you provide a sample of your current filter, Thesvin can replicate the interface. Fit is confirmed with a sample before production.
Yes. You can send an old filter box as a reference, and Thesvin's engineers will measure it and create a production drawing for your approval. This is often faster than preparing a drawing from scratch.
The filter box achieves ≥99.99% removal of PM0.3 particles. It is available in HEPA grades H13 and H14, and also includes activated carbon for VOC adsorption. Efficiency is verified in Thesvin's CNAS-accredited laboratory.
Yes. Thesvin offers full customisation of housing size and shape, port configuration, filter grade, and sealing method. The housing can be made from medical-grade ABS or PC, and the silicone seal is ultrasonically welded. Logo and packaging customisation are also available.
The standard MOQ is 1,000 pieces, but custom orders may have different MOQs depending on tooling requirements. Lead time is typically 25–35 days for custom production after sample approval. Thesvin will confirm exact schedules when you request a quote.
Yes. Thesvin provides samples of existing specifications for free evaluation (freight collect). Custom samples are available and can be discussed based on development complexity. Samples help you verify fit and performance before committing to production.
Replace the filter box according to your device manufacturer's recommendations or when you observe increased resistance or reduced airflow. Thesvin can provide guidance based on your operating conditions. Regular replacement ensures consistent filtration efficiency.
Thesvin holds medical goods GMP certification, IATF 16949, ISO 9001, ISO 14001, and ISO 45001. The filter box is manufactured under these systems, and filtration efficiency is verified in the company's CNAS-accredited laboratory. Compliance documents for REACH and RoHS are available.