Filtralite Pure HC 2,5–5 is a high-quality filter media, manufactured from expanded clay material, used for biological treatment in drinking water plants and pre-treatment for desalination.
Filtralite filter media, with its highly porous structure, enables large microbial growth surface for biological filtration and reduced operational costs.
| Commercial name | FILTRALITE® HC 2,5–5 |
|---|---|
| Type of material | Expanded clay |
| Appearance | Crushed particles, porous surface structure |
| Manufactured by | Leca Finland Oy (Saint-Gobain Group), Finland |
| Version | 2 |
| Size and weight | Value | Deviation | Comments |
|---|---|---|---|
| Particle size range | 2,5–5 mm | < 2,5 mm max. 5% + Δ < 0,125 mm > 5 mm max. 5% | EN 12905 |
| Bulk density, dry, compressed | 840 kg/m³ | ± 75 kg/m³ | EN 1097-3, 10 strokes |
| Particle density, apparent | 1 790 kg/m³ | ± 150 kg/m³ | EN 1097-6: Annex E |
| Other properties | Value | Comments |
|---|---|---|
| Voids | ~55% | EN 1097-3, approx. value |
| Acid solubility | < 5% | EN 12902 |
| Friability | < 5% ~ 8% | EN 12902, d1 750 strokes EN 12902, d10 750 strokes |
Chemical Composition, Approx. Values
| SiO2 | Al2O3 | Fe2O3 | K2O | CaO | Na2O |
|---|---|---|---|---|---|
| 53% | 19% | 14% | 4,7% | 2,8% | 2,4% |
Explanations: N = Normal density | M = Medium density | H = High density. | C = Crushed. | R = Round
