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Kontakta oss Oltaven's Dust Filter Box (HEPA Grade) is a finished filter assembly that combines a high-precision PTFE microporous membrane, glass fibre media and composite activated carbon to capture…
FILTER MEDIA / ROLLS · SHEETS · DIE-CUT
Oltaven's Dust Filter Box (HEPA Grade) is a finished filter assembly that combines a high-precision PTFE microporous membrane, glass fibre media and composite activated carbon to capture PM0.3 particles at an efficiency of ≥ 99.99% while adsorbing VOCs. It is built for clinical ventilators and anaesthesia machine circuits, industrial respirators and positive-pressure breathing apparatus, and high-specification fresh-air and oxygen-generation equipment. Oltaven supplies the completed filter — pleated, framed, sealed and tested — rather than loose media, so the efficiency, resistance and capacity you specify are the ones you receive.
A filter medium is only a starting point. The same PTFE membrane can end up as a high-efficiency, low-resistance cartridge or as a restrictive panel, depending on how it is pleated, supported and framed. Oltaven builds the Dust Filter Box as a complete assembly: the media is folded to a defined pleat geometry, held in a moulded ABS or PC housing produced to the customer's drawing, and closed with an ultrasonic-welded medical silicone seal so that air cannot bypass the filter face.
That last step matters as much as the media itself. An unsealed edge lets unfiltered air slip past the pleats, and the measured efficiency of the assembly then falls below the rating of the material inside it. By treating forming and sealing as part of the product — not as packaging around it — Oltaven can state the performance of the finished box and stand behind it in the application.
Three outcomes matter to a device designer: how much is captured, how hard the air has to be pulled through, and how long the filter lasts before it loads up. Each is set by a different part of the build.
Efficiency is governed first by the medium grade. The Dust Filter Box uses a high-precision PTFE microporous membrane, top-grade glass fibre and composite activated carbon. The PTFE membrane delivers the PM0.3 removal rate of ≥ 99.99%, while the activated carbon layer adds adsorption of VOC gases — particle interception and gas-phase control in one element. Extended levels are available, including HEPA H13 and H14 media, so a customer can match the grade to the clinical or industrial requirement rather than over-specifying.
Resistance comes from pleat count, pleat depth and the open area of the housing. More pleats in the same footprint spread the airflow over more media, lowering face velocity and pressure drop — but pack them too tightly and the pleats mask each other. Oltaven balances media area against the airflow the device can deliver, then verifies the result on the finished assembly.
Capacity is the dust the filter can hold before resistance rises too far. Deeper pleats and a larger media area raise capacity; a well-sealed frame keeps all incoming air passing through the media so that the whole face shares the load. Because Oltaven moulds the housing to the customer's drawing, the internal volume can be sized to the service interval the device requires.
The Dust Filter Box is used where both particles and gases must be controlled in a breathing or air-supply path:
Because the housing is produced to customer drawings, the same filter concept can be adapted to different device interfaces without changing the media strategy.
| Item | Detail |
|---|---|
| Product name | HEPA ventilator filter / respirator cartridge (dust filter box, HEPA grade) |
| Core media | High-precision PTFE microporous membrane / top-grade glass fibre / composite activated carbon adsorption material |
| Core performance | Dual action: precise removal of PM0.3 particles at ≥ 99.99% efficiency, with VOC gas adsorption |
| Grade options | HEPA H13 / H14 elements available |
| Main applications | Clinical medical ventilators, anaesthesia machine circuits, industrial respirators / positive-pressure breathing apparatus, high-specification fresh-air purification and oxygen-generation equipment |
| Dimensions and housing | Tooling and production to customer drawings; non-toxic medical-grade ABS/PC injection-moulded housing; medical silicone ultrasonic-welded sealing ring to prevent leakage |
| Certification | Filter efficiency verified at the company's CNAS-accredited testing centre; manufacturing under Medical Supplies GMP, IATF 16949, ISO 14001 and ISO 45001 |
Oltaven is a filter manufacturer with more than 20 years of development and production experience and over 1,000 filter solutions developed to date. OEM/ODM work is core to what we do: dimensions, structure, media grade, frame material, logo and packaging can all be customised, and we hold the tooling and process knowledge to take a drawing through to a finished cartridge.
The production base covers 50,000 m², including six cleanrooms totalling 20,000 m², where media slitting, pleating, assembly and packing for HEPA medical filter boxes are carried out to limit secondary contamination. An in-house CNAS-accredited laboratory verifies filtration efficiency, dust-holding capacity, resistance and other key parameters and can issue test reports with shipments. The company holds IATF 16949 (obtained in 2024), ISO 9001, ISO 14001 and ISO 45001 system certification, and products meet REACH and RoHS requirements with compliance documents available. Quality control runs through IQC, IPQC and OQC, and automated lines support monthly output in the millions of pieces. The company is located in Zhongshan, Guangdong, China, and has exported to Europe, the United States, Japan and Korea for more than 20 years.
To quote accurately, tell us the device or vehicle model the filter fits, the size or a drawing, the airflow or water flow the system delivers, the operating conditions, and the quantity you expect per order or per year. With those details Oltaven can recommend a media grade and housing design and confirm MOQ, sample timing and lead time. Contact our team to begin.
Resistance is set by how much media area is packed into the housing and how openly air can pass through it. More pleats and deeper pleats lower face velocity and pressure drop, while tight pleating or a restricted frame raises it. Two boxes with identical outer dimensions can therefore behave very differently once installed.
The Dust Filter Box removes PM0.3 particles at ≥ 99.99% efficiency, and the composite activated carbon layer also adsorbs VOC gases. Efficiency is verified at Oltaven's CNAS-accredited testing centre, which can issue reports covering filtration efficiency, resistance and dust-holding capacity with the shipment.
Yes. Oltaven produces the housing to customer drawings in non-toxic medical-grade ABS/PC, with a medical silicone ultrasonic-welded seal, and offers media grades from HEPA H13 to H14. Dimensions, structure, frame material, logo and packaging can all be adapted, so the filter matches your device interface rather than the other way round.
It starts with your device model, a drawing or sample, the target efficiency grade, airflow and expected quantity. Oltaven then proposes a media and structure, produces a sample — typically within 7–15 days depending on complexity — and validates it at the CNAS laboratory before tooling and batch production. You can begin through the inquiry form on our contact page.
Standard items usually carry an MOQ of 1,000 pcs, while customised items are agreed according to tooling requirements. Existing specification samples can be provided free for evaluation with freight collect; custom samples are discussed based on development complexity. Stock lead time is about 7–15 days and custom batch production is generally 25–35 days.
Replacement depends on the dust and VOC load at the installation point and on the resistance limit your device allows, so Oltaven does not publish a single interval. Monitor pressure drop or follow the device manufacturer's schedule, and contact us with your operating conditions if you need help setting an interval for a specific application.
Yes. Products meet REACH and RoHS requirements and compliance documents can be provided, and manufacturing runs under Medical Supplies GMP, IATF 16949, ISO 9001, ISO 14001 and ISO 45001. Oltaven has exported to Europe, the United States, Japan and Korea for more than 20 years. Share your market requirements with our team and we will confirm the documents available.
Request existing specification samples for free evaluation, or commission a custom sample and review its CNAS test report before approving tooling. This lets your engineers confirm fit, resistance and efficiency in the actual device. Send your device details through our contact page to arrange it.