AQUA-SF Sand filter

Our specifically designed AQUA-SF systems are capable of straining or filtering a signifi-cant portion of suspended, floatable, sinkable material, colloidal mater, bacteria and other microorganisms from incoming water. These systems uses specially prepared silica/quartz sand (used in various sizes) and gravel beds which ensures effective filtration of all un-wanted materials. The specific media is arranged in such a way that ensures the dirt parti-cles are not able to pass through filter bed rather retained on top of the filter bed. Aqua-SF sand filters have been extensively tested for various applications and are found to give excellent filtration results.

During water filtration, the unfiltered water is distributed in the top of the sand filter which slowly sink through the filter bed. This water flows downward through the filter media (although up flow filters are also available) which initially indicates a minimal head loss across the filter. As retained suspended particles buildup on the filter media, the head loss increases. When the head loss reaches a pre-determined value, backwash in the upward direction is initiated which expand and loosen the bed and allow all of the retained debris flow out of the filter. Sufficient space is provided above the filter bed for expansion during backwash.

Most of the AQUA-SF systems uses downwards pressure filtration techniques. However, depending upon the feed water quality, system design and filtered water application, filtra-tion may also be carried out under gravity flow or pressure flow (Ask Water 2000 Customer Support for additional details).