12×40 Coconut Shell Carbon
for Water Treatment
The global standard for potable water purification. Ultra-low ash, high iodine value, NSF 61 compatible. Removes chlorine, VOCs, taste, and odor from source to tap.
The Industry Standard for Drinking Water Carbon
12×40 mesh coconut shell activated carbon is the most widely installed GAC media in potable water treatment globally. From municipal water plants processing millions of gallons daily to under-sink filters in homes, this specification delivers proven performance for chlorine removal, taste and odor control, and organic contaminant reduction.
Our coconut shell source material produces a micropore-dominant carbon ideal for small molecule adsorption. The low ash content (≤3%) means minimal pH rise during startup and fewer fines that could cloud filtered water. Steam activation at 900–1000°C develops the internal surface area to ≥1100 mg/g iodine number — exceeding typical specifications for drinking water applications.
Key Performance Metrics
Iodine Number
Superior micropore development
Ash Content
Minimal leachables, fast startup
Chlorine BV
Bed volumes at 2 ppm inlet
Hardness
Low fines generation in service
Applications
- Municipal drinking water treatment
- Point-of-use (POU) water filters
- Whole-house filtration systems
- Food & beverage processing
- Pharmaceutical-grade water polishing
- Chlorine and chloramine removal
- Taste and odor elimination
- VOC and THM reduction
12×40 vs Other Mesh Sizes for Water
| Parameter | 12×40 (Ours) | 8×30 | 20×50 |
|---|---|---|---|
| Adsorption Speed | Fast | Moderate | Very Fast |
| Pressure Drop | Moderate | Low | High |
| Bed Life | Long | Longer | Shorter |
| Best For | POU / Municipal | Large vessels | Rapid contact |
| NSF 61 Standard | ✓ Default | ✓ | Less common |
Technical Specifications
| Mesh Size | 12×40 (0.42–1.70 mm) |
| Raw Material | Premium coconut shell |
| Iodine Number | ≥ 1100 mg/g |
| Hardness (Ball Pan) | ≥ 97% |
| Ash Content | ≤ 3% |
| Moisture | ≤ 5% |
| Bulk Density | 0.48 – 0.52 g/cm³ |
| pH | 9 – 11 (acid-washed: 6–8) |
| CTC Activity | ≥ 60% |
| Abrasion Number | ≥ 85% |
| Activation | Steam activated, 900–1000°C |
Acid-washed version available for pH-sensitive applications
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Why Water Companies Choose Hojee
Drinking Water Focus
Dedicated production line for food/water grade carbon. No cross-contamination with industrial grades.
Full Documentation
COA per batch with iodine, ash, pH, heavy metals (Pb, As, Cd, Hg). NSF 61 test reports available.
Scale Supply
500+ tons/month capacity for 12×40 mesh. Consistent quality across orders.
Global Delivery
FOB Ningbo/Shanghai. 7–10 day lead time. Containerized or palletized as needed.
Frequently Asked Questions
Why 12×40 mesh for water treatment?
What certifications does this carbon meet?
How does coconut shell compare to coal-based for drinking water?
What is the chlorine removal capacity?
What is the MOQ and packaging?
Need 12×40 GAC for Your Water System?
Request samples for filter testing. COA and NSF documentation included with every quote.