Cylindrical HEPA Filter for Air Purifiers

This cylindrical HEPA filter is a 360° intake air filter that captures fine dust and allergens in household air purifiers, commercial fresh-air systems, car cabin purifiers and high-end vacuums. Ranveth pairs high-throughput PP, PP+PET composite nonwoven and PTFE media in a layered build, so each grade is matched to the particle size and airflow resistance your device can handle. It is made for appliance brands and OEM buyers who need a filter that fits a specific cavity and performs predictably over its service life.

Media Pairing and Layer Build

The filter is built around a 360° cylindrical core, which lets air enter from every side and supports a higher clean air delivery rate for a given fan speed. What sits on that core is a deliberate pairing of media: a high-throughput PP layer for dust holding, a PP+PET composite nonwoven where mechanical strength and pleat stability matter, and PTFE where fine-particle capture and low resistance are the priority. These materials are not interchangeable; each brings a different balance of efficiency, pressure drop and dust capacity.

On the outside and inside of the cylinder, Ranveth can laminate a pre-filter mesh or an activated carbon layer. The pre-filter takes the coarse dust load first, which protects the HEPA layer and extends service life; the carbon layer adds gas and odour control without changing the filter’s footprint. Because the layers are selected as a system, a buyer can tune the same basic cylinder for a mid-efficiency pre-stage or a high-efficiency HEPA stage, depending on what the end product is designed to achieve.

The practical result of this pairing is a filter whose efficiency, airflow resistance and life are set at the design stage rather than adjusted later. A denser media stack raises capture efficiency but also raises resistance; a more open stack lowers resistance and raises dust holding capacity. Ranveth’s approach is to start from your device’s airflow and target efficiency, then choose the media and layer order that meet both without overbuilding the filter.

Specification Sheet

Where It Is Used

The cylindrical format is common in appliances where space is tight and airflow is radial. In household air purifiers, the 360° intake helps raise CADR while keeping the unit compact. In commercial fresh-air systems, the same filter can be specified at a higher efficiency grade to protect downstream components and occupied spaces. Car air purifiers and high-end vacuum cleaners use the cylinder because it fits around a motor or fan housing and can be sealed with a simple end cap.

Because dimensions are fully custom, the filter can be made to match an existing cavity rather than forcing a redesign. Buyers typically choose the media grade based on the particle size they need to capture and the static pressure their fan can overcome. Where odours or volatile organic compounds are a concern, an activated carbon layer can be added to the same cylinder.

What to Send Us for a Custom Build

To quote a custom cylindrical HEPA filter, Ranveth needs a small set of inputs. The more precise they are, the faster the sample and quotation process.

• Device or vehicle model, plus a drawing or sample of the current filter if one exists.
• Required diameter and height, or the cavity dimensions the filter must fit.
• Target airflow (m³/h) and, where relevant, water flow or pressure drop limits.
• Operating conditions: ambient dust level, temperature, humidity and expected running hours.
• Quantity per order and annual volume, so we can advise on tooling and production scheduling.

With these details, our team can recommend a media combination and layer order, then produce a sample for your bench testing.

Why Source from Ranveth

Ranveth’s media choices are test-backed. Our in-house laboratory is CNAS-accredited and issues reports on filtration efficiency, dust holding capacity and resistance, so the layer build we propose for your filter can be verified before mass production.

Production takes place in a 50,000 m² plant in Zhongshan, Guangdong, China, which includes six cleanrooms with a combined area of 20,000 m². Cleanroom assembly helps prevent secondary contamination of HEPA media during converting and finishing.

The factory holds IATF 16949 certification, obtained in 2024, and operates ISO 9001, ISO 14001 and ISO 45001 systems. Quality control follows IQC, IPQC and OQC stages, and products meet REACH and RoHS requirements with compliance documents available on request.

With more than 20 years of filtration R&D and manufacturing experience, Ranveth has developed over 1,000 filtration solutions and exports to Europe, the US, Japan and South Korea. OEM/ODM support covers size, structure, media grade, frame material, logo and packaging.

Request Samples and a Quote

If you are evaluating a cylindrical HEPA filter for a new appliance or replacing an existing supply, send your device model, size or drawing, airflow or water flow requirement, operating conditions and quantity. We will respond with a media recommendation, sample plan and quotation. You can reach the team through our contact page.