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Contact Oltaven's single/double flange high-efficiency filter is a finished panel filter built with high-performance glass fiber media and an anodized aluminum frame. It filters airborne particles…
FILTER MEDIA / ROLLS · SHEETS · DIE-CUT
Oltaven's single/double flange high-efficiency filter is a finished panel filter built with high-performance glass fiber media and an anodized aluminum frame. It filters airborne particles at E11 (sub-high efficiency) or E12 (high efficiency) grades and is designed for cleanrooms, hospitals, HVAC terminals, and FFU systems. This page explains how media choice and forming decisions determine the finished filter's efficiency, resistance, and dust capacity—and how Oltaven delivers the complete filter, not just the media.
Media is the starting point, but it does not define a filter on its own. The same glass fiber paper can become a low-resistance filter for a cleanroom ceiling or a high-efficiency barrier for a hospital operating room, depending on how it is pleated, framed, and sealed. Oltaven manufactures finished filters, which means we control every step from pleat geometry to final leak testing.
Pleating sets the surface area available for dust capture. Tighter pleats pack more media into a given footprint, lowering face velocity and resistance, but if pleats are too close, dust bridges across them and capacity drops. Framing provides structural support and defines the filter's fit in a duct or FFU. The single or double flange design affects how securely the filter seats against the mounting surface. Sealing closes the path between media, frame, and housing so that air cannot bypass the filter. Each decision trades off efficiency, resistance, and capacity against the others.
Three performance numbers matter most to specifiers: efficiency, resistance, and dust capacity. All three are set by the combination of media, pleating, framing, and sealing—not by media grade alone.
Efficiency is determined by the media's fiber structure and the integrity of the seal. Glass fiber paper with fine, uniform fibers captures submicron particles by interception and diffusion. However, if the seal between the media pack and the frame is incomplete, air will bypass the media and efficiency collapses. Oltaven's single/double flange design and controlled sealing process maintain a continuous barrier, and every filter is scan-tested to verify there are no leak points.
Resistance depends on face velocity, pleat density, and media permeability. Higher pleat counts increase media area and reduce resistance, but they also raise the risk of pleat collapse under pressure. Oltaven balances pleat geometry against the frame's rigidity to deliver stable resistance across the rated airflow range. For example, the 592 × 592 × 88 mm size is rated at 2000 m³/h for E11 and 1000 m³/h for E12, reflecting the higher pressure drop of the denser E12 media.
Dust capacity is the amount of contaminant a filter holds before resistance reaches its final value. It is influenced by pleat depth, media area, and the uniformity of pleat spacing. Filters with deeper pleats and consistent spacing hold more dust, extending service life. Oltaven's forming process maintains pleat uniformity, which helps achieve predictable capacity in demanding environments.
In short, media choice sets the ceiling for efficiency, but pleating, framing, and sealing determine whether that ceiling is reached reliably in the finished product.
Oltaven's single/double flange high-efficiency filters are used wherever controlled particle levels are required. Typical applications include:
The same filter platform can be adapted to different airflow rates and mounting arrangements through size and flange customization.
| Item | Detail |
|---|---|
| Product name | Single/Double Flange Medium & HEPA Filter |
| Filter class (EN 1822) | E11 (sub-high efficiency) / E12 (high efficiency) |
| Core filter media | High-throughput ultra-fine glass fiber filter paper |
| Frame material | Anodized aluminum alloy profile |
| Core applications | Pharmaceutical/electronics cleanrooms, hospital operating rooms, HVAC terminals, FFU systems |
| Standard sizes and rated airflow (W × H × D) | • 287 × 592 × 88 mm (E11 rated airflow 1000 m³/h; E12 rated airflow 500 m³/h) • 592 × 592 × 88 mm (E11 rated airflow 2000 m³/h; E12 rated airflow 1000 m³/h) |
| Customization (OEM/ODM) | In-house CNAS testing center; ISO 9001 and IATF 16949 certified. Custom flange dimensions, non-standard airflow rates, and special sizes available. |
Oltaven brings over 20 years of filtration product development and manufacturing experience to every order. We support OEM/ODM projects with custom sizes, structures, media grades, frame materials, logos, and packaging, and have developed more than 1,000 filtration solutions for customers worldwide.
Our production base covers 50,000 m², including six cleanrooms totaling 20,000 m². The in-house laboratory is CNAS-accredited and can issue test reports for filtration efficiency, dust holding capacity, and resistance. We are certified to ISO 9001, ISO 14001, and ISO 45001, and we achieved IATF 16949 certification in 2024. Our products comply with REACH and RoHS environmental regulations, and we can provide compliance documentation.
Starting from your requirements, we follow a structured process to deliver finished filters that match your system. The typical workflow is:
This process ensures that the finished filter meets your efficiency, resistance, and capacity targets.
To receive a tailored proposal, please provide the following details:
Send your requirements through our contact page and our team will respond promptly.
Resistance depends on the media's permeability, pleat density, and face velocity. Even with identical outer dimensions, a filter with more pleats or a denser glass fiber media will have higher resistance. Oltaven optimizes pleat geometry for each media grade to balance resistance against efficiency and dust capacity.
An OEM project starts with your specifications: size, flange type, airflow, and operating conditions. Oltaven's engineering team reviews these details, proposes a design, and provides a quotation. After sample approval, we proceed to production with full quality control.
Oltaven's single/double flange filters are available in E11 (sub-high efficiency) and E12 (high efficiency) grades according to EN 1822. The exact efficiency depends on the media and construction, and every filter is scan-tested to ensure performance.
Yes. Oltaven offers custom flange dimensions, non-standard airflow rates, and special sizes to fit your installation. We also support custom logos and packaging as part of our OEM/ODM service.
For standard sizes, MOQ is typically 50–100 units. Custom sizes usually require 100–300 units depending on complexity. Samples can be provided; please contact us for specific sample arrangements.
Standard products ship in 7–15 days. Custom orders typically take 25–35 days after sample approval. Oltaven maintains multiple automated production lines and sufficient raw material stock to support urgent requests.
Replacement interval depends on pre-filtration, operating velocity, and cleanliness level. In standard applications, typical life is 3–5 years, with replacement when resistance reaches twice the initial value. Oltaven can provide monitoring guidance and lifecycle support.
Each filter undergoes 100% scan testing in our CNAS-accredited laboratory to detect leaks. The single/double flange design and controlled sealing process maintain a continuous barrier between media and frame, preventing bypass.