The dense bottom layer for sub-micron polishing
Garnet Filter Media
High-density almandine garnet for the fine bottom layer of multimedia filters, capturing particles that pass through sand and anthracite above.
- Manufactured to: EN 12910
- Manufactured to: AWWA B100
Overview
Garnet's specific gravity of around 4.0 is roughly 50% higher than silica, which is exactly why it works as the bottom layer: it stays below the sand through backwash even at a much finer particle size. That combination — fine grain, high density — lets a multimedia bed polish down to 10–20 microns without the layers inverting.
Packing options
- Woven polypropylene bag25 kg
- Jumbo bag (FIBC)1,000 kg
Available gradations
Garnet Filter Media
| Size | Typical use |
|---|---|
| 0.3 – 0.6 mm (#30–40) | Fine polishing layer |
| 0.6 – 1.2 mm (#12–20) | Transition / support layer |
| 1.0 – 2.0 mm (#8–12) | Coarse support beneath fine garnet |
- Size
- 0.3 – 0.6 mm (#30–40)
- Typical use
- Fine polishing layer
- Size
- 0.6 – 1.2 mm (#12–20)
- Typical use
- Transition / support layer
- Size
- 1.0 – 2.0 mm (#8–12)
- Typical use
- Coarse support beneath fine garnet
Other cuts can be produced to specification — send us the effective size and uniformity coefficient you need.
Technical specification
| Property | Typical value | Test method |
|---|---|---|
| Specific gravity | 3.9 – 4.1 g/cm³ | — |
| Hardness | 7.5 – 8 Mohs | — |
| Acid solubility | ≤ 2% | — |
| Bulk density | 2,200 – 2,400 kg/m³ | — |
- Property
- Specific gravity
- Typical value
- 3.9 – 4.1 g/cm³
- Test method
- —
- Property
- Hardness
- Typical value
- 7.5 – 8 Mohs
- Test method
- —
- Property
- Acid solubility
- Typical value
- ≤ 2%
- Test method
- —
- Property
- Bulk density
- Typical value
- 2,200 – 2,400 kg/m³
- Test method
- —
Typical values. The certificate issued with your shipment reports the figures measured on that production lot.
Where it is used
Municipal Water Treatment
Rapid gravity and pressure filters producing potable water for towns and cities.
Reverse Osmosis Plants
Guard beds and carbon filters protecting membranes from particulates and chlorine.
Industrial Water
Process, cooling and boiler feed water filtration across manufacturing sites.
Pharmaceutical
Purified water pre-treatment ahead of RO, EDI and WFI systems.
Food & Beverage
Process water treatment for bottling, brewing, dairy and food production.
Need this grade?
Send the gradation, the volume and the destination port. Our technical team responds within one working day with pricing, lead time and a specimen certificate of analysis.