Valli Granular Antracite is of natural origin and derives from bright and shining dark grey sedimentary rocks, the main component of which is carbon, accompanied by a small amount of sulphur, nitrogen and hydrogen.

Valli Granular Antracite is mainly used in the water purification field. The product is carefully processed and selected based on the granulometric curve and the chemical composition.

Valli Granular Antracite complies with the UNI EN 12909 standard, “chemicals used for the treatment of water intended for human consumption”. Having a lower density and a higher grain size than silica sands, it is suitable for filtering waters, in both the civil and industrial fields. The filtering action is carried out by the irregular shape of the grains creating intragranular holes. This allows to obtain high filtration speed and good retention of impurities, with minor load loss.

Valli Granular Anthracite is available in regular grain sizes: 0.6/1.2 mm,1.2/2.5 mm and 2.5/5 mm or upon the customer’s specific request.