Industrial filtration solution system for the future – Nederman MikroPul FS Flat bag filter with reverse air cleaning

For more than 70 years the Nederman Group has been one of the world’s leading suppliers of products and solutions within the environmental technology sector, focusing on industrial air filtration and recycling. Nederman products and solutions contribute to reducing the environmental impact from industrial production processes and to creating a safe and clean working environment whilst boosting production efficiency. The Group’s offering covers everything from the design stage through to installation, commissioning and servicing.

Providing customers with a turnkey solution and thoroughly solving their problems in the workshop process, Nederman has greatly helped improve their working environment. With excellent offline reverse air cleaning technology, not only can customers now have more efficient filtration, lower emissions and a safe work environment, the outside environment and air quality has also improved considerably.

The Nederman MikroPul operation in Friesenheim, Germany manufactures the FS Flat Bag filter that since 1965 has been hugely successful for foundry applications internationally. The air volume capacity can be up to 250 000 m3/hr and temperatures up to 250 degree C.

Dirty gas enters the filter from the top with airflow direction in the filter itself from top to bottom. The dust is held back by the filter bags and these are gently cleaned by clean air after a certain differential pressure or preset time has been achieved. The dust drops into the dust collection hopper and is conveyed away via the dust discharge

The Nederman MikroPul FS range of filters has been continuously improved over the years to increase its service life and maintenance friendliness. The number of wearing parts has been minimised and the overall efficiency of the filter has been increased.

The advantages of the FS filter design are numerous including a compact design with a small footprint and low space requirement, easy access to replace bags, reverse air cleaning so no use of compressed air is required, can handle very fine dusts, has low maintenance requirements and an attractive dust emission warranty.

The Tornado hood can capture high temperature fumes at all stages of melting, pouring and charging of an induction furnace. The hood is controlled and synchronised automatically to adjust to required air volume with high efficiency performance and less energy consumption.

Since 1965 more than 15 000 Nederman MikroPul FS filters have been installed as dust collector plants in foundries around the world, including South Africa. The Nederman MikroPul team has considerable dust collection experience for a vast range of foundry applications including:

• Various types of furnaces in order to protect employees from harmful substances, make operations more efficient and profitable and meet statutory regulations for emissions
• Sand reclamation plants for resin bound sand: shakeouts, sand coolers and separators, secondary attrition and thermal reclamation
• Sand reclamation for green sand plants: screens, conveyor belts, vibrating conveyors, bucket elevators, magnetic separators, silos, sand coolers, mixers and shake out grids
• Moulding lines, box or box less: pouring lines, cooling conveyors, cooling and shake out drums
• After cast: shot blasting, fettling stations, manipulator grinding cells

Around South Africa several leading foundries are enjoying the benefits of the Nederman MikroPul FS flat bag filter with numerous filters having been in successful operation for more than ten years. The application references include dust extraction from induction furnace melting platforms, shake outs, green sand plants, thermal reclamation plants in no bake foundries, vibrating drums, shot blast installations and large grinding cells. During recent years, Endeco-Omega Foundry Machinery (Pty) Ltd has successfully handled the local fabrication portion and installation of some of these Nederman MikroPul FS filters.

The small footprint of the FS flat bag filter allows for easier installation. This installation includes insulation of the filter box to address dew-point issues due to high temperature of the raw gas. A high efficiency skimmer to remove sparks and solid particles from the dirty gas prior to entering the filter itself can also be added

Nederman MikroPul will design and plan new dust collection systems and modernise or expand existing systems. Nederman MikroPul is well positioned to offer solutions for processes that generate hazardous, health-threatening air pollution such as foundry emissions and assist customers to comply with applicable environmental legislation.

You can take a look at the FS Flat Bag Filter video by visiting

The Nederman Group has subsidiaries in 30 countries and agents and distributors in over 30 countries. Nederman is ISO 9001 and 14001 certified. The Group develops and produces in its own manufacturing and assembly units in Europe, North America and Asia.

Nederman MikroPul is represented in South Africa by Mondeco Solutions (Pty) Ltd. For further details contact them on TEL: 079 448 1277, email: or visit