Industrial Filter Media Portfolio
Engineered for maximum suspended solids retention, low headloss accumulation, and precise backwash re-stratification in municipal, healthcare, and industrial deep-bed clarifiers.
1. Anthracite Filter Media
Produced from selected low-ash, high-carbon anthracite coal. Characterized by a fractured, angular grain shape and lower bulk density (approx 0.8 g/cm³) with specific gravity between 1.40 and 1.60 g/cc. This lower density allows anthracite to settle above denser quartz silica sand (2.65 g/cc) after hydraulic backwashing, establishing a true coarse-to-fine multi-media gradient. Suspended solids penetrate deep into the anthracite voids instead of blinding the filter surface, virtually doubling operating run lengths.
Core Product Features:
Key Industrial Applications:
- Dual-Media Pressure Filters (DMF): Standard upper-layer filter media in municipal waterworks and tertiary ETP polishing.
- Reverse Osmosis Pre-Filtration: Effective reduction of Silt Density Index (SDI < 3.0) and colloidal turbidity.
- Condensate Polishing: Trapping iron oxide scale and oil droplets in high-pressure thermal power boilers.
- Swimming Pool & Recreational Water: Rapid clarification and high-flow filtration without premature headloss.
AWWA B100 Anthracite
AWWA B100 Specification Matrix:
| Parameter | Standard Specification |
|---|---|
| Fixed Carbon | Min 85 – 90% |
| Specific Gravity | 1.40 – 1.60 g/cc |
| Bulk Density | Approx 0.80 – 0.85 g/cc |
| Uniformity Coefficient | Max 1.40 – 1.45 |
| Acid Solubility (1:1 HCl) | Max 2.0% (AWWA B100) |
| Mohs Hardness | 3.0 – 3.5 |
| Moisture Content | Max 2% |
Engineered size-density ratio ensures clear separation between Anthracite and Quartz layers after every backwash cycle.
Available Formats & Grain Sizes of Anthracite Media
0.8 mm – 1.6 mm
Standard fine anthracite grade for dual-media filtration systems and municipal potable filtration beds.
1.0 mm – 2.0 mm
Medium-coarse grade designed for high-velocity tertiary effluent polishing and industrial cooling tower water.
1.5 mm – 2.5 mm
Coarse filtration grade engineered for high-turbidity intake rivers and primary raw water clarification.
2.0 mm – 4.0 mm
Extra-coarse anthracite for heavy solids loading in steel mill wastewater and industrial sludge dewatering filters.
2. Graded Quartz Silica Sand
Extracted from selected high-purity natural silica quartz deposits. The raw mineral undergoes comprehensive hydro-washing, attritive scrubbing, kiln drying, and precision classification across vibrating screen decks. Our silica sand is completely free from clay, silt, organic dust, and calcareous carbonates. The sub-angular to sub-rounded grains provide an optimal void ratio for high-capacity particulate entrapment down to 10–20 microns.
Core Product Features:
Key Industrial Applications:
- Pressure Sand Filters (PSF): The premier medium for commercial and industrial filtration vessels.
- Rapid Gravity Filters (RGF): Municipal drinking water clarification conforming to IS 8419 standards.
- RO Pre-Treatment: Filtering suspended solids prior to reverse osmosis membranes to preserve permeate flux.
- Effluent Clarification: Polishing discharge streams in chemical, textile, and automotive plants.
99.2% Pure SiO2 Quartz
Technical Specification Matrix:
| Parameter | Standard Specification |
|---|---|
| Silicon Dioxide (SiO2) | Min 98.8 – 99.5% |
| Specific Gravity | 2.65 g/cc |
| Bulk Density | Approx 1.55 – 1.65 g/cc |
| Acid Solubility (HCl) | Max 0.5% (IS 8419) |
| Hardness (Mohs Scale) | 7.0 (Scratch Resistant) |
| Clay & Fine Silt | < 0.5% (Max) |
| Uniformity Coefficient | < 1.35 – 1.40 |
Delivered bone-dry in sealed 50kg bags to avoid clump formation and ensure precise bed stratification.
Available Formats & Grain Sizes of Silica Sand & Quartz Gravel
0.5 mm – 1.0 mm
Standard core filtration sand for Pressure Sand Filters (PSF) and tertiary reverse osmosis pre-treatment.
1.0 mm – 2.0 mm
Coarser sand for intermediate transition filtration layer beneath the primary fine sand bed.
2.0 mm – 3.0 mm
High-capacity coarse filtration sand and underbed intermediate barrier media.
Graded Filter Gravel
Washed quartz support pebbles graded in 3–6mm, 6–12mm, and 12–25mm for bottom vessel strainer support.
3. Silex Sand & Flint Quartz Media
Silex sand is a high-density, cryptocrystalline flint quartz media with sub-rounded morphology. Mined and classified specifically to serve as the critical bottom foundation layer in multi-bed pressure vessels and rapid gravity sand filters. Silex prevents fine filtration sand and activated carbon granules from entering or blocking the collection lateral nozzles, while providing even dispersion of scouring air and backwash water.
Core Product Features:
Key Industrial Applications:
- Underdrain Foundation: Essential support bed layer resting directly above slotted lateral hub strainers.
- Channeling Prevention: Eliminates localized hydraulic channeling through the active sand/carbon bed.
- Air Scour Uniformity: Distributes auxiliary scouring air evenly across the cross-sectional tank area.
High-Density Underbed Support
Technical Specification Matrix:
| Parameter | Standard Specification |
|---|---|
| Silicon Dioxide (SiO2) | Min 98.0% |
| Grain Shape | Sub-rounded flint quartz |
| Specific Gravity | 2.60 – 2.65 g/cc |
| Bulk Density | 1,500 – 1,600 kg/m³ |
| Acid Solubility | < 0.8% (IS 8419) |
| Hardness (Mohs) | 7.0 |
| Standard Gradings | 1.2–2.4mm, 2.0–4.0mm, 4.0–8.0mm |
High-density flint quartz gravel resists lifting during air-scour and high-rate water backwashing.
Available Formats & Sizing of Silex Sand
1.2 mm – 2.4 mm (Fine Silex)
Fine transition support layer placed immediately below fine silica sand or granular carbon.
2.0 mm – 4.0 mm (Medium Silex)
Intermediate supporting gravel preventing media migration into lower distributor laterals.
4.0 mm – 8.0 mm (Coarse Silex)
Bottom bed support layer resting directly over underdrain strainers and nozzle plates.