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Vortisand® Filtration Systems

Vortisand® Filtration Systems

What is a Vortisand System?​

Cross-Flow Technology With Microsand Media. The Vortisand® systems are synonymous with water filtration, serving the industrial water markets since 1986. The award-winning Vortisand product is a High Efficiency Microsand Filtration System. It is a high capacity media filter that combines cross-flow dynamics with microsand media to achieve submicron filtration performance. This technology allows the unit to operate at filtration rates of up to 5 times greater than those of traditional media filters, while filtering 10-50 times finer.

With over 2,500 installations worldwide, the Vortisand product has become a leader in high efficiency filtration systems.

Vortisand filtration systems use exclusive VortiJetTM injectors to generate cross-flow patterns that sweep the surface of the media. This sweeping motion causes a portion of the water to flow parallel to the top media layer, allowing for high filtration rates while preventing fouling and channeling.

Contaminants trapped in suspension and within the microsand media (depth filtration) are easily removed using an automatic backwash cycle. The system’s backwash cycle requires less flow and a shorter duration than traditional sand or multi-media filters. The result is a technology that removes particles down to submicron levels at 4 to 5 times the hydraulic flow rate of other media filters, while requiring up to 50% less water for backwash.

Filtration Mode

The filter is put into service with an initial head loss through the clean media, between 5 and 8 psi (depending on the filtration rate). As dirty water is being filtered, the head loss through the media will increase. When the head loss reaches the high differential pressure set point (between 12 and 18 psi), the inlet and outlet valves are closed. The air scouring phase begins (1-2 minutes), followed by the backwash phase (5-12 minutes). The cycle is paused (1 minute), followed by an optional rinse phase (2-5 minutes). The cycle is paused again (1 minute) before normal filtration is resumed.

Backwash Mode

In many applications, an air scouring phase precedes the backwash phase. Simultaneous air and water backwashing is not used. The duration of the air scouring phase is set by the operator (typically from 1 to 2 minutes). The purpose of the air scouring phase is to provide a high-energy scrubbing action that removes biofilm or other sticky material from the media.

The frequency of backwash depends on the raw water quality (concentration, size and nature of particles). The duration of the phase is set by the operator (typically from 5 to 12 minutes).

Cross-flow Filtration

How It Works