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The Thesvin Gas Filter Box is a high-efficiency HEPA filter cartridge for ventilator and respirator circuits. It combines a PTFE membrane with activated carbon to capture PM0.3 particles at ≥99.99% efficiency and adsorb VOCs. It is designed for clinical ventilator and anaesthesia machine circuits, industrial respirators, and high-specification air supply systems. Thesvin manufactures it to your drawing, so the frame, seals, and dimensions match your host device.
Fitment drives the design. Thesvin builds each gas filter box to your drawing or sample, so the outer dimensions, port configuration, and sealing surfaces align with your ventilator, anaesthesia machine, or respirator housing. The housing is injection-moulded from non-toxic medical-grade ABS or PC, and the seal is a medical silicone ring joined by ultrasonic welding. That welded joint creates a continuous barrier against leakage at the interface. Because the tooling is opened to your specification, you can define the frame profile, wall thickness, and locating features that hold the filter in the device.
The result is a drop-in fit that maintains the seal under the pressure and flow of your circuit. If you are replacing an existing part, send the old filter and Thesvin will match its critical dimensions before producing a new mould. For new designs, share a 2D drawing or 3D model and the team will confirm the interface before tooling. This fitment-first approach is the same one Thesvin applies across more than 1,000 filtration solutions developed for customers.
The filter media is a composite: a high-precision PTFE microporous membrane, fine glass fibre, and activated carbon. The PTFE layer provides the particle barrier, capturing PM0.3 and larger at ≥99.99%. The activated carbon layer adsorbs and neutralises VOCs and odours. This dual action means one cartridge handles both particulate and gaseous contaminants in the breathing circuit.
Thesvin offers this filter in HEPA H13/H14 grades and in ULPA U15 and above for higher efficiency requirements. A washable version is also available. Typical applications include clinical ventilator and anaesthesia machine circuits, industrial gas masks and positive-pressure respirators, and high-specification fresh-air and oxygen-generation equipment. The filter is manufactured under medical device GMP and tested for filtration efficiency in Thesvin’s CNAS-accredited laboratory.
| Item | Detail |
|---|---|
| Product name | High-efficiency HEPA filter / ventilator filter cartridge |
| Core media | High-precision PTFE microporous membrane / fine glass fibre / composite activated carbon |
| Filtration performance | Dual action: PM0.3 removal ≥99.99% plus adsorption and neutralisation of VOCs |
| Grade options | HEPA H13/H14 up to ULPA U15 and above; washable version available |
| Main applications | Clinical ventilator and anaesthesia circuits; industrial respirators and positive-pressure respirators; high-specification fresh-air and oxygen-generation equipment |
| Dimensions and housing | Moulded to customer drawing; non-toxic medical-grade ABS/PC housing; medical silicone seal ring joined by ultrasonic welding for leak-free performance |
| Certification and testing | Filtration efficiency verified by the company’s CNAS-accredited testing centre; medical device GMP, IATF 16949, ISO 14001, and ISO 45001 certificates held |
Thesvin operates a 50,000 m² facility in Zhongshan, Guangdong, China, including six cleanrooms totalling 20,000 m². The quality system is built on IATF 16949 (achieved in 2024) and ISO 9001, ISO 14001, and ISO 45001 certification. For this gas filter box, dimensional consistency is controlled through IQC, IPQC, and OQC: incoming materials are inspected, in-process dimensions and seal integrity are checked, and finished cartridges are verified before packing. The company’s CNAS-accredited laboratory validates filtration efficiency and resistance, so performance data can support your regulatory submissions.
With more than 20 years of filtration manufacturing and export experience to Europe, the US, Japan, and Korea, Thesvin can provide REACH and RoHS compliance documents. Standard samples ship in 3–5 working days; custom samples involving tooling typically take 15–30 days. Batch lead time is 25–35 days after order confirmation. The standard MOQ is 1,000 pcs; custom configurations are evaluated individually.
To get a quote, send the device or vehicle model, a drawing or the old part, the airflow or water flow, your operating conditions, and the required quantity. Thesvin will confirm fitment and propose the right configuration. Contact us to start your inquiry.
Thesvin produces each gas filter box to your drawing or sample, so the outer dimensions, ports, and seal match your device. Send a drawing, 3D model, or the old filter and the team will confirm the interface before tooling. This fitment-first process applies to ventilators, anaesthesia machines, and respirators.
Yes. You can mail an old filter and Thesvin will measure its critical dimensions to replicate the fit. This is often faster than creating a new drawing for existing devices. The team will confirm the dimensions with you before opening a mould.
The PTFE membrane captures PM0.3 particles at ≥99.99%. The filter is available in HEPA H13/H14 and ULPA U15 and above grades. Efficiency is verified in Thesvin’s CNAS-accredited laboratory.
Yes. Thesvin offers full customisation of dimensions, housing material (medical-grade ABS or PC), media grade, and seal geometry. You can also specify washable media or add activated carbon for VOCs. Tooling is opened to your drawing.
Send your device model, drawing or old part, airflow, operating conditions, and quantity via the contact form. Standard samples ship in 3–5 working days; custom samples with tooling take 15–30 days. A quote follows once the specification is confirmed.
The standard MOQ is 1,000 pcs; custom configurations are evaluated individually. Batch lead time is 25–35 days after order confirmation. Thesvin holds raw material stock at its Zhongshan facility to support repeat orders.
Replacement depends on the application. For single-use clinical ventilator circuits, replace after each patient. Reusable types typically last 24–72 hours. Home ventilator use is usually 1–3 months. Thesvin can provide life-test data to help you set a schedule.
Thesvin holds medical device GMP, IATF 16949, ISO 9001, ISO 14001, and ISO 45001 certificates. The CNAS lab can issue filtration efficiency and resistance reports. These documents can support your FDA or CE (MDR) submissions. Contact us to discuss your specific requirements.