Oil Mist Filters - How It Works

The most efficient way to collect oil mist and smoke is by extracting contaminated air close to the source. Nederman Filtac solutions are designed for continuous operations in demanding airflow applications.

FibreDrain™ technology provides superior separation performance and a long filter medial life ranging between 2-5 years! Our selection of filters cover a complete scope of wet to medium-wet, semi-dry (MQL) and dry applications.

FibreDrain™ Concept

The more rapid and efficient a manufacturing process is, the more oil mist and smoke are created. To effectively control these pollutants, Nederman/Filtac developed the Oil Mist FibreDrain™ Concept.

With high speed, high pressure and heat, oil mist and smoke droplets become extremely small, < 1 µm (submicron). Specially treated filter media is required to effectively capture and drain the coalesced droplets back to the process.

FibreDrain™, the secret behind this outstanding performance, is made up of a combination of filters to enable and secure this strategy, ensuring long oil mist filter life and maintaining excellent filtration and drainage properties.

How It Works

Nederman Filtac mist solutions collect oil mist and oil smoke at the source (directly at the machine, either enclosed or open). The oil-laden air is passed through the layers of compressed filter media at low velocity.

FibreDrain™ technology allows for the highest standard of efficiency, 99.95% @ 0,3 µm, regardless of challenging conditions in continuous operations.

The air stream enters at the bottom of the filter unit and passes upward through the filter cartridges. The filter stack is progressive in filtration properties, which means that the smaller the particle, the further it will penetrate the filters in the air flow direction.

Collected droplets fuse and grow in fibre intersections where they are drained from the filter surface by gravity down in the sump of the collector.

Nederman Filtac filters don't absorb or get clogged by the oil, instead, the air is thoroughly cleaned and the collector allows for max. amounts of coolant to be retrieved and reused.

  1. The air stream enters at the bottom of the oil mist/smoke collector and is passed upward through the filter cartridges
  2. Oil mist and smoke is passed through layers of compressed filter media at low velocity
  3. The captured mist drains from the filter surface by gravity down into the sump of the collector
  4. Cleaned air is passed through a HEPA filter and dispersed back into the working environment

Final HEPA Filter

The final stage of filtration is with a HEPA Filter in grade H13 according to test standard CEN 1822.

The filter media is located in waterproof glass and the frame is developed for oil mist applications in waterproof MDF or plastic casting.

To prolong HEPA filter life, the upstream filters have to be highly efficient. HEPA filter life depends on the cumulative loading it receives, which in turn, depends on the performance of the upstream collection stages.

The combination of FibreDrain™ oil mist filters and HEPA filter makes the exhaust air clean and achieves very long filter life.

Why It Works

The efficiency and drainage capability vs. pressure drop are the parameters that have to be understood and observed.

Nederman Filtac is competent in using various-sized specially treated fibers and combining them in filter cartridges to result in high efficiency and long filter life.

To have a good working oil mist or smoke collector, you must understand what filter media to use and where and what size unit needs to be installed. Air Cleaning Specialists has the experience to recommend the best filter combination and unit.

Pre-Filter ORF (Oil Repellent Filter)

Certain applications create a lot of solid particles that can potentially destroy filters. To protect the filter life of FibreDrain™ filters, an Oil Repellent pre-filter, ORF can be installed. All units come prepared with room for a pre-filter as standard.

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