Filters for powderhandling

The main filters
The filters are the lungs of the vacuum conveyor. They clear out the dust that would otherwise contaminate the manufacturing facility and the lungs of the operators. They also make sure to keep the vacuum pump operational, and they ensure compliance with the rigorous and ever-changing safety regulations and other demands on health and safety within various processes. The position of vacuum conveyor filters varies - from inside the conveyor body to being placed externally in air inlets to ensure compliance with higher demands.

Vacuum conveyors provide a contained alternative to bucket elevators, screw conveyors, or other mechanical solutions to transfer powders and granules. Still, expectations and requirements have changed a lot throughout the past decades. As a response, the mounting of filters became easier, the filtration grade and air permeability increased, and the design became modular. Compared to the one-filter set up in a 1991 Piab vacuum conveyor series, devices today feature 1, 3, or 7 filters, depending on the conveyed volume or the conveyor size.

Also, the introduction of the built-in air shock assembly made the conveyors easier to set up and clean, leading to a longer filter life and higher production capacity due to less need for cleaning filters during production. The vacuum filter shock system today is built into each Piab vacuum conveyor, integrated with the top lid of the conveyor. These devices have a cyclic operation, and the conveyed material is ejected by the end of each period to a receiving vessel or device. When a period is over, the filter gets cleaned by a filter shock. Each filter has its own filter shock for the highest level of efficiency.