Support gravel is used in the treatment of potable water, sewage and industrial effluents. It is installed as a support layer beneath the filtration media (pumice, sand, garnet or anthracite) in various filtration systems. The support gravel aids in the distribution of air during the backwash phase and allows the filter to remain free draining under heavy loadings.
Technical Data Sheet
1. Product Name / Reference
Support Gravel
2. Main Intended Use
Support layer for water filtration media
3. Chemical Description
| Compound Element | Chemical Formula | Typical Content |
| Silicon Dioxide | SiO2 | 97.00% |
| Ferric Oxide | Fe2O3 | 1.73% |
| Aluminium Oxide | Al2O3 | 0.32% |
| Potassium Oxide | K2O | 0.05% |
4. Physical Properties
| a. Bulk Density | 1.56 – 1.60 g/cm3 |
| b. Specific Gravity | 2.65 g/cm3 |
| c. Solubility in HCL | 2% maximum |
| d. Loss on Ignition | 1% maximum |
| e. Hardness | 6 – 7 Mohs |
5. Sizes Available
| Grade | Size |
| BS 5/8 | 2.00 – 3.35 mm |
| BS 4/10 | 1.70 – 4.00 mm |
| BS 2/6 | 3.00 – 6.00 mm |
6. Packaging
Packed in 25kg sacks and 1000kg, 1250kg and 1500kg IBC big bags.
| Water Filtration | Yes |
| Odour Control | Yes |
| Green Roof Systems | No |
| Cosmetics Scrubs | Yes |
| Dental Treatments | Yes |
| PCB Scrubbing | No |
| Glass Treatments | Yes |
| Metal Finishing | Yes |
| Lightweight Precast Concrete | No |
| Odour Treatment | No |
| Seawater Reverse Osmosis | Yes |
| Automotive Polish | No |
| Effluent Treatment | Yes |
| Horticulture | Yes |
| Construction | No |
| Hand Cleaner | Yes |
| Paints & Coatings | Yes |
| Lightweight Plasters | Yes |
| Salt Saturator | Yes |