Frequently asked questions.

Dust in the air needs a large airflow at the capture point. Dust on surfaces needs a high vacuum. A vacuum cleaner built for surfaces does not remove dust that hangs in the air.

Source: NORRES hose data and our own proposed solutions.

It depends on how the dust is released and on the distance from the opening to the source. Distance matters most. The Airflow calculator gives a first estimate for your hood and distance.

Source: capture velocities from ACGIH, Industrial Ventilation, 30th edition, table 6-2.

Manufacturers state the airflow at full inlet. A smaller inlet or a smaller hose gives less air, with every manufacturer.

Source: manufacturer data for each model.

Our dust collectors come from Tiger-Vac, Depureco and Delfin, 40 models in all. We choose the machine from your task, not from one brand.

Source: our model lists for the three manufacturers.

Choose by the zone the machine will work in, then check the marking and limits on each product page.

Sources: EU declarations, manuals and manufacturer data.

No. Some models are marked for gas only, not for dust zones.

Sources: EU declarations, manuals and manufacturer data.

No. ACD models are for combustible dust, but the machine itself must not stand in an ATEX zone.

Source: Delfin manual, section 4.1.

Check the dust group in the marking. Models marked IIIB are not for conductive dust.

Sources: EU declarations, manuals and manufacturer data.

Both are absolute filters for very fine dust. Depureco states a filtration efficiency of 99.95 % for H13 and 99.995 % for H14.

Source: Depureco catalogue Dust Collectors (EN), page 5.

A gauge on the machine shows when the filter is filling up. As the filter fills, suction drops.

Source: manufacturers’ manuals.

Yes. The machines are easy to service, so you can do it yourself. We send service reminders based on the manufacturer’s recommended maintenance intervals, and you choose whether to accept the offer.

Source: manufacturers’ maintenance intervals.

None of the manufacturers’ documents states a food or pharma approval for the machines. We show the documented material and filter. The food contact approvals are on the hoses.

Sources: manufacturer documents; NORRES factsheets for the hoses.

CP hoses for extraction arms and dust collectors with a fan. AIRDUC hoses for industrial vacuum cleaners. Find your machine’s maximum vacuum on its product page or rating plate. If it is not stated, ask us.

Source: NORRES factsheets.

Six things make the first conversation shorter: type of dust, amount, ATEX zone, power supply, distance to the source and inlet diameter. Not sure about some of these? That’s fine.