ULPA Grade Dust Filter Box for Ventilators and Respirators

Oltaven's ULPA Grade Dust Filter Box is a high-efficiency filtration component designed for ventilators, anesthesia machines, and industrial respirators. It captures PM0.3 particles with an efficiency of ≥99.99% and combines particulate removal with VOC adsorption, making it suitable for clinical and industrial users who require reliable air purification. The filter is manufactured under GMP for medical products and can be fully customized to fit specific device models.

From Media to Finished Filter

The performance of a finished filter is determined not only by the filter media but also by how that media is pleated, framed, and sealed. At Oltaven, we sell finished filters, not just media. Our ULPA Grade Dust Filter Box uses a composite of high-precision PTFE membrane, glass fiber, and activated carbon. The PTFE membrane provides ultra-fine particle capture, while the activated carbon layer adsorbs VOCs and other gaseous contaminants. The media is pleated to maximize surface area within a compact housing, and the pleat geometry directly influences airflow resistance and dust holding capacity. The pleated media is then encased in a housing—typically made of medical-grade ABS or PC—and sealed with medical silicone through ultrasonic welding to ensure leak-free operation. This combination of materials and construction yields a filter that delivers consistent efficiency and low resistance in real-world applications.

What Decides Finished Performance

Several factors interact to determine the final performance of a filter. First, the choice of media sets the baseline efficiency and resistance. The PTFE membrane in this filter is engineered to capture ≥99.999% of particles at the most penetrating particle size (MPPS), which typically falls between 0.1 and 0.2 μm. The glass fiber layer adds mechanical strength and depth filtration, while the activated carbon handles gaseous pollutants. Second, the pleating process affects the effective filtration area: more pleats can increase capacity but may also raise resistance if not designed properly. Third, the housing and seal integrity are critical to prevent bypass leakage. Oltaven uses injection-molded housings with precise tolerances and ultrasonic welding to create a durable seal that maintains the filter's efficiency throughout its service life. Finally, the manufacturing environment—cleanrooms and strict quality control—ensures that no contamination is introduced during assembly.

Applications

This filter is primarily used in clinical ventilator and anesthesia machine circuits, where high-efficiency filtration protects patients and equipment. It is also suitable for industrial respirators and positive-pressure breathing apparatus, as well as high-specification fresh air purification and oxygen generation systems. The filter's ability to remove both particles and VOCs makes it versatile for environments where airborne contaminants may include both biological and chemical agents.

Technical Specifications

The Oltaven Factory and Certifications

Oltaven specializes in OEM/ODM filtration solutions and has developed over 1,000 custom filter designs for clients worldwide. Our production facility covers 50,000 m², including six cleanrooms totaling 20,000 m², which support the manufacturing of high-purity filters. We operate a CNAS-accredited laboratory that can perform filter efficiency, dust holding capacity, and resistance tests. Our quality management system is certified to IATF 16949 (2024) and ISO 9001, ISO 14001, and ISO 45001. Products comply with REACH and RoHS regulations, and we can provide the necessary documentation for market access. With more than 20 years of experience in filtration, we serve customers in Europe, the United States, Japan, and South Korea.

OEM/ODM Workflow

1. Inquiry and requirement gathering: share your device model, dimensions, airflow, or water flow, and operating conditions.
2. Design and proposal: our engineering team proposes a filter design, including media selection, pleat pattern, and housing.
3. Tooling and sampling: upon approval, we fabricate tooling (15–20 days) and produce samples for your validation.
4. Sample approval: you test samples; we refine until specifications are met.
5. Mass production: after sample approval, we commence production with strict IQC, IPQC, and OQC.
6. Delivery: standard lead time for OEM orders is 25–35 days, excluding tooling.

Start a Custom Project

To begin your custom filter project, please provide the following details: your device or vehicle model, required dimensions or a drawing, airflow or water flow specifications, operating conditions (temperature, humidity, contaminants), and estimated quantity. Our team will respond with a tailored proposal. Contact us to discuss your requirements and discover how Oltaven can support your filtration needs.