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This is a washable activated carbon sponge filter that combines coarse particle capture with adsorption of formaldehyde, benzene and ammonia. It is built for air purifier pre-filters, fresh-air system intakes, car cabin filters and similar odor-control stages. Ranveth supplies it as a flexible polyurethane sponge loaded with固化 activated carbon, and pairs the media with the layer build to balance efficiency, airflow resistance and service life.
The filter starts with a polyurethane sponge carrier. Activated carbon, in powder or fine granular form, is fixed into the sponge through a curing process so the adsorbent stays distributed through the open-cell structure rather than sitting only on the surface. That pairing is what lets one layer do two jobs: the sponge network intercepts hair, dust and other coarse particles as a pre-filter, while the carbon handles formaldehyde (HCHO), benzene, ammonia and similar gases.
Because the carbon is carried inside a flexible open-cell sponge, the media can be cut and punched into shapes that follow an appliance intake or a return-air grille. The same structure keeps resistance low enough for pre-filter use and allows repeated washing. In practice, the layer build is chosen around the target: a more open sponge favors airflow, while a denser carbon loading favors adsorption capacity. Ranveth tunes that balance with the buyer rather than offering a single fixed grade.
| Item | Detail |
|---|---|
| Product name | Washable activated carbon sponge filter |
| Core carrier | Polyurethane sponge |
| Adsorbent | Quality powdered or fine granular activated carbon, fixed by a curing process |
| Filtration role | Coarse particle capture (hair, dust) plus adsorption of formaldehyde (HCHO), benzene, ammonia and similar gases |
| Physical advantages | Washable and reusable, low airflow resistance, flexible and easy to cut, good air permeability |
| Typical end uses | Air purifier pre-filter layer, fresh-air system pre-filter, car cabin filter, central air-conditioning return-air grille, industrial vacuum cleaner |
| Customisation | OEM/ODM flexible customisation: thickness from 3 mm to 50 mm, pore density (PPI) and outer dimensions, with die-cut forming |
| Quality system | Produced with the company's 20,000 m² cleanroom capacity; ISO 9001/14001 environmental and quality systems and IATF 16949 certification |
The most common position is the first stage of an air purifier, where the sponge catches coarse dust before the main filter and the carbon takes the first pass at odors. Fresh-air ventilation systems use it as a pre-filter on the intake side, and central air-conditioning return-air grilles use it to protect downstream coils and filters. Car cabin filters use the same media where space is tight and a flexible sheet is easier to fit. Industrial vacuum cleaners use it to control odors in the exhaust stream.
Because the material can be die-cut and punched, it also suits small appliances and OEM assemblies that need an odor-removal layer in an irregular space. The washable design is relevant where the buyer wants a reusable consumable rather than a throw-away pad, and the low resistance keeps it from adding noticeable load to the fan.
To quote a custom build, send the device or vehicle model, or a drawing with the dimensions and shape. Tell us the airflow or water flow the filter will see, the operating conditions such as temperature, humidity and contaminant type, and the quantity you expect per order and per year. If you already have a target thickness between 3 mm and 50 mm, a PPI, or a preferred carbon loading, include that as well. With those inputs Ranveth can propose a media pairing and layer build, then confirm samples before production.
The media choices behind this filter are test-backed. Ranveth's in-house laboratory is CNAS-accredited and can issue reports on filtration efficiency, dust holding capacity and resistance, so the carbon loading and sponge structure can be checked against the application rather than assumed. Production runs in a 50,000 m² plant that includes six cleanrooms totaling 20,000 m², which supports consistent cleanliness for filter media.
The company holds IATF 16949 certification, obtained in 2024, and ISO 9001, ISO 14001 and ISO 45001 systems. Products meet REACH and RoHS requirements and compliance documents can be supplied. With more than 20 years of filter development and manufacturing, Ranveth has built over 1,000 filter solutions and exports to Europe, the US, Japan and Korea. The address is Zhongshan, Guangdong, China.
If you are evaluating this media for a device or vehicle program, send the model, size or drawing, airflow or water flow, operating conditions and quantity through our contact page. We will reply with a proposed media pairing, sample arrangement and quotation.
It uses a polyurethane sponge carrier with quality powdered or fine granular activated carbon fixed into the open-cell structure by a curing process. That combination provides coarse particle capture and adsorption of formaldehyde, benzene and ammonia in one layer.
A more open sponge with lower carbon loading favors airflow and is suited to pre-filter positions, while a denser carbon loading favors adsorption capacity. Ranveth tunes the balance between the two around the device's airflow and contaminant target.
Yes. Ranveth supports OEM/ODM customisation with thickness from 3 mm to 50 mm, pore density (PPI) and outer dimensions, including die-cut forming for irregular spaces. Send a drawing or device model so the shape and layer build can be confirmed.
The sponge is washable and reusable, which lowers consumable cost where the buyer wants a repeat-use pad. Replacement still depends on the application and contaminant load; confirm the interval with Ranveth based on your operating conditions.
MOQ and lead time for this product are confirmed per project based on media, thickness and die-cut requirements. Send your quantity and drawing through the contact page and Ranveth will reply with the applicable MOQ and schedule.
Yes, samples can be arranged so you can check fit, airflow and odor adsorption in your assembly. Include the device model, size or drawing, airflow and expected quantity in your sample request.
Ranveth holds IATF 16949 (obtained in 2024) plus ISO 9001, ISO 14001 and ISO 45001 systems, and products meet REACH and RoHS requirements. The in-house laboratory is CNAS-accredited and can issue filtration efficiency, dust holding capacity and resistance reports.
Send the device or vehicle model, size or drawing, airflow or water flow, operating conditions and quantity through <a href="/en/contact">our contact page</a>. Ranveth will review the inputs and respond with a proposed media pairing, sample plan and quotation.