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This is a ULPA-grade dust filter box for ventilator and respirator circuits, built by Ranveth around a layered media stack: a high-precision PTFE microporous membrane, fine glass fibre, and a composite activated carbon layer. It captures PM0.3 particles at ≥ 99.999% and adsorbs VOCs in the same pass, so one housing handles both particulate and gaseous load. It is made for clinical ventilator and anaesthesia machine circuits, industrial respirator masks and positive-pressure respirators, and high-spec fresh-air and oxygen-generation equipment.
The performance of a filter box is decided before assembly, at the point where media are matched to each other. In this build the PTFE microporous membrane does the fine particle work; its pores are small and consistent enough to hold back PM0.3 at ≥ 99.999% while keeping the pressure drop within the range a ventilator can drive. The fine glass fibre layer behind it supports the membrane and shares the dust load, which slows the rise in resistance as the filter loads. The composite activated carbon layer is placed to handle VOCs and odours that pass the particle stages, so the airstream leaves with both particle and gas load reduced.
Each layer is chosen for what it contributes to the stack, not on its own. A denser membrane raises efficiency but costs airflow; a heavier carbon layer improves gas adsorption but adds resistance. The pairing is set so that efficiency, airflow resistance and service life stay in balance for the intended duty. Ranveth offers ULPA configurations from U15 upward, so the same housing concept can be tuned to a circuit that needs more efficiency or one that needs lower resistance.
| Item | Detail |
|---|---|
| Product name | ULPA ventilator filter / respirator cartridge |
| Core media | High-precision PTFE microporous membrane, fine glass fibre, composite activated carbon |
| Particle performance | PM0.3 removal efficiency ≥ 99.999% |
| Grade options | ULPA U15 and above, multiple efficiency configurations |
| Typical applications | Clinical ventilator and anaesthesia machine circuits; industrial respirator masks and positive-pressure respirators; high-spec fresh-air and oxygen-generation equipment |
| Dimensions and housing | Tooled to customer drawings; non-toxic medical-grade ABS/PC injection-moulded housing; medical silicone seal joined by ultrasonic welding for a leak-tight fit |
| Verification and systems | Filter efficiency verified at the company's CNAS-accredited test centre; manufacturing under medical supplies GMP certification; IATF 16949, ISO 14001 and ISO 45001 system certificates |
The filter box is used where a circuit must stay clean over a defined service interval and where both particles and gases matter. In clinical settings it sits in ventilator and anaesthesia machine breathing circuits, where the particle stage protects the patient side and the carbon layer addresses trace VOCs. In industrial settings it serves respirator masks and positive-pressure respirators, where dust load can be heavy and unpredictable. It is also specified in high-specification fresh-air purification and oxygen-generation equipment, where the same media pairing supports the required cleanliness at an acceptable resistance.
Because housings are tooled to customer drawings, the same media stack can be packaged for different devices. Ranveth produces the non-toxic medical-grade ABS/PC housing and the medical silicone seal by ultrasonic welding, so the finished part is matched to the mating interface rather than adapted to it.
Custom work starts from the interface, not the media. Send the device or respirator model, the dimensional drawing or a physical sample, and the airflow the circuit delivers. Tell us the operating conditions: dust concentration, temperature, humidity, and whether VOCs are present, since that decides how much carbon is needed. State the efficiency grade you are designing to, the quantity per order and per year, and any housing or connector requirements. With those inputs the media pairing, layer order and housing tooling can be fixed in one review.
Media choices here are test-backed. Ranveth's own laboratory holds CNAS accreditation and issues reports on filtration efficiency, dust holding capacity and resistance, so the pairing in a quotation is supported by measured data rather than assumption.
Production runs in a 50,000 m² plant in Zhongshan, Guangdong, which includes six cleanrooms totalling 20,000 m². The company holds IATF 16949, obtained in 2024, along with ISO 9001, ISO 14001 and ISO 45001 system certificates, and manufactures under medical supplies GMP certification. Products meet REACH and RoHS requirements, with compliance documents available. Quality control covers IQC, IPQC and OQC across the flow. With more than 20 years in filtration and over 1,000 filtration solutions developed, Ranveth supports OEM/ODM across dimensions, structure, media grade, housing material, logo and packaging.
To receive samples and a quotation, send the device or vehicle model, the size or drawing, the airflow or water flow the system delivers, the operating conditions, and your quantity. Our team will confirm the media pairing and grade for your duty and reply with pricing and lead time. Contact Ranveth to start the review.
It uses a high-precision PTFE microporous membrane for fine particle capture, a fine glass fibre layer that supports the membrane and shares the dust load, and a composite activated carbon layer for VOC adsorption. The layers are matched so particle efficiency, airflow resistance and service life stay in balance for the duty.
The filter removes PM0.3 particles at ≥ 99.999%, and it is offered in ULPA configurations from U15 upward. Efficiency is verified at the company's CNAS-accredited test centre, and reports on efficiency, dust holding capacity and resistance can be issued.
Yes. Housings are tooled to customer drawings, using non-toxic medical-grade ABS/PC and a medical silicone seal joined by ultrasonic welding for a leak-tight fit. Media grade and layer build can also be configured, including ULPA U15 and above.
Send the device or respirator model, the size or drawing, the airflow the circuit delivers, the operating conditions and your quantity. The team will confirm the media pairing and grade, then reply with pricing and lead time; samples can be arranged for verification.
Minimum order quantity depends on the specification and whether tooling is required. Share your target quantity and annual volume with the inquiry, and Ranveth will confirm the MOQ for the exact configuration.
Lead time depends on whether the build is standard or custom-tooled. Provide the model, drawing and quantity in your inquiry, and the team will confirm the schedule for your configuration.
Replacement interval depends on dust concentration and VOC load in the application. The filter is a consumable and should be changed when resistance rises beyond the circuit's limit; confirm the interval for your operating conditions during the review.
Yes. The composite activated carbon layer adsorbs VOCs and odours after the particle stages, so the airstream leaves with both particle and gas load reduced. Tell us which gases are present so the carbon layer can be sized accordingly; <a href="/en/contact">contact us</a> to discuss your application.