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Filtration · water, pool, process
Filter sand and support gravel
Sub-angular quartz media, 98–99% SiO₂, in two sized fractions: a 0.3–0.7 mm filter sand for rapid sand and pool filters, and a 1.2–2.5 mm support gravel for the underdrain layer. Low iron, low fines, bagged.
Grades
Two fractions, sized by the producer. Chemistry in weight per cent.
| Property | Filter sand 0.3–0.7 mm · approx. 25–50 mesh |
Support gravel 1.2–2.5 mm · approx. 8–16 mesh |
|---|---|---|
| SiO₂, minimum | 98.43 | 98.09 |
| Fe₂O₃ | 0.005 – 0.015 | 0.005 – 0.010 |
| Al₂O₃ | 0.780 – 0.920 | 0.600 – 1.100 |
| CaO + MgO | 0.025 – 0.035 | 0.025 – 0.050 |
| Na₂O + K₂O | 0.460 – 0.565 | 0.460 – 0.715 |
| Loss on ignition | 0.150 – 0.200 | 0.150 – 0.200 |
| Effective size (D10) | [ES, mm] | [ES, mm] |
| Uniformity coefficient (D60/D10) | [UC] | [UC] |
| Acid solubility | [%, 24 h in HCl] | [%, 24 h in HCl] |
| Specific gravity | 2.65 | 2.65 |
| Grain shape | Sub-angular | Sub-angular |
Chemistry is the producer's specification range. Sieve analysis, effective size, uniformity coefficient and acid solubility are reported per lot on the certificate of analysis. Mesh equivalents are approximate U.S. standard sieve sizes.
Where it is used
- Swimming pool filters. Residential and commercial sand filters; the 0.3–0.7 mm grade corresponds to the common #20 pool filter sand range.
- Industrial process water. Rapid sand filters and multimedia vessels for cooling water, boiler feed and wash water.
- Produced-water and wastewater treatment. Pressure filters and underdrain gravel.
- Packaged treatment systems. OEM fills for skid-mounted and containerised units.
- Aquaculture and aquarium. Biological and mechanical filter beds.
Potable water in public systems requires NSF/ANSI 61 certified media. Ask us about certification status before specifying this product for drinking water.
Packaging and supply
- Bags
- 25 kg / 50 lb PP bags on pallets
- Big bags
- [BIG BAG WEIGHT] kg
- Minimum order
- [MOQ] · trial pallets available
- HTS code
- 2505.10
- Documents
- TDS, SDS (OSHA HazCom, crystalline silica), lot certificate of analysis with sieve data
- Delivery
- DAP or DDP, continental U.S.