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SA’s leading

industrial air filtration company


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Installation Quality

Conveying velocity within the ducting design is very important to ensure that dust particles from the dust collector move through without collecting within the ducting system. Should the particles move too slowly or too quickly it can be problematic.

Envirox understands that when airflow is not set at the correct speed problems can occur, and through the Nederman NEDQuote program Envirox is able to design ducting systems that will ensure that the conveying velocity is adequate for what it is being used for. Envirox also supplies NordFab ducting that is easily installed, removed and cleaned by clamp-together ducting.

Problems experienced when conveying velocity is incorrect

If conveying velocity is incorrect the potential exists for the dust to dropout and settle in the duct. The duct needs to remain free from any dust particles as this can cause the duct or its supports to fail. The accumulation of dust can also create concern around combustibility or corrosion.

Another possibility due to the accumulation of settling dust is the reduction in the duct cross sectional area. With the air volume being pulled through a smaller cross-sectional area, the air velocity would increase in that section of the duct, which can experience increase abrasions. The fan will also fail due to insufficient static capacity and therefore the total air volume will drop resulting in an overall reduction in the system’s performance.

Excessive duct velocities also cause problems within the ducting. Abrasive dusts can cause an increase in the wear and tear of the ducting material which will need to be replaced. This increased airflow will also require more energy, and therefore can become very costly.
Envirox is available to provide experienced solutions to its client’s ducting needs and can offer advice on the conveying velocity for the application, and how to maintain it.