VNF1-8040 NF Membrane
Effective membrane area: 37.2㎡
Desalination rate: 30-60%
SO₄²⁻ Removal rate: 98%
Water production: 37.9 m³/day
Maximum water inlet pressure: 4.1 Mpa
Influent PH value range: 3-10
Maximum inlet water turbidity: 1.0 NTU
VNF1-8040 NF Membrane
The VNF1-8040 nanofiltration membrane is an 8-inch industrial NF element manufactured by Vontron, designed for large-scale water treatment systems requiring higher permeate flow and stable divalent salt rejection.
Compared to 4-inch elements, the 8040 configuration provides significantly greater membrane area and output capacity, making it ideal for municipal, industrial, and high-volume process water applications.
VNF1-8040 is commonly used as a cost-effective alternative to FilmTec™ NF270-8040 (by DuPont) in industrial projects.
Key Technical Specifications (Industrial Grade Focus)
| Item | DuPont FilmTec NF270-8040 | Vontron VNF1-8040 |
|---|---|---|
| Membrane Type | Nanofiltration (NF) | Nanofiltration (NF) |
| Standard Element Size | 8″ × 40″ | 8″ × 40″ |
| Effective Membrane Area | ~400 ft² (≈ 37.2 m²) | ~400 ft² (≈ 37.2 m²) |
| Typical Permeate Flow | ~10,000 GPD (≈ 37.9 m³/day) | ~10,000 GPD (≈ 37.9 m³/day) |
| Salt Rejection (MgSO₄) | ≥ 97% | ≥ 98% |
| Salt Rejection (NaCl) | 20-50% | 30-60% |
| Test Operating Pressure | ~70 psi (0.48 MPa) | ~100 psi (0.69 MPa) |
| Maximum Operating Pressure | 600 psi (4.1 MPa) | 600 psi (4.1 MPa) |
| Maximum Operating Temperature | 45 °C | 45 °C |
| Operating pH Range | Continuous: 2–11(Cleaning: 1–12) | Typically 2–11 (Cleaning: 1–12) |
| Output Water SDI | ≤ 3 | ≤ 3 |
| Free Chlorine Tolerance | < 0.1 ppm (must be removed) | < 0.1 ppm (must be removed) |
| Typical Applications | Drinking water treatment, organic matter (TOC) removal, partial softening | Drinking water, industrial process water, bottled water, wastewater polishing |
| System Compatibility | Standard 8040 membrane housings | Fully compatible with standard 8040 membrane housings |
| Price | About $1,000/pcs | About $700/pcs |
Note: The above data are from Dow's official website and Vontron's official website.
🔗 Read our detailed blog: DOW NF270 Alternative: Why Vontron NF Membrane Is a Smart Replacement
Why Choose 8-Inch NF Instead of 4-Inch?
- Higher membrane area per element
- Reduced system footprint per m³ capacity
- Lower installation cost per unit of water produced
- Fewer pressure vessels required
- Ideal for skid-mounted and containerized systems
Industrial Performance Advantages of VNF1-8040
- High-flux design for large-scale plants
- Stable divalent ion rejection (softening + sulfate removal)
- Partial monovalent salt passage (balanced mineral profile)
- Energy-efficient compared to RO
- Compatible with standard 8040 pressure membrane housings
- Reliable long-term operation in continuous systems
Comparison of Recommended Membranes (FilmTec™ NF270-8040 vs Vontron VNF1-8040)
| Application Requirements | Recommended Membrane |
|---|---|
| Large-scale municipal water treatment with high daily output | NF270-8040 (higher flux, globally established brand) |
| Industrial process water or bottled water systems requiring stable performance | VNF1-8040 (high cost-performance ratio) |
| Tight budget & large-volume membrane supply projects | VNF1-8040 |
| Projects requiring long-term stability, brand assurance & international compliance | NF270-8040 |
| EPC / Engineering contracts needing international standard elements | NF270-8040 |
| Replacement or retrofit of existing 8040 membrane systems | VNF1-8040 |
💡Conclusion:
✅ NF270-8040 is positioned as the premium, internationally recognized solution preferred in EPC / regulated markets.
✅ VNF1-8040 is positioned as the cost-effective industrial alternative, especially when membrane quantity is large or budget is sensitive.
Typical Industrial Applications
Municipal water treatment plants
Industrial process water systems
Boiler feed water pretreatment
Food & beverage manufacturing lines
Mining & chemical industries
Water reuse and zero-liquid-discharge (ZLD) pre-treatment
requently Asked Questions (FAQ) – VNF1-8040 Membrane
Q: What is the difference between VNF1-4040 and VNF1-8040?
A: The 8040 version has a larger diameter (8 inches) and significantly higher membrane area, making it suitable for industrial-scale systems with higher daily output requirements.
Q: Is VNF1-8040 compatible with NF270-8040 systems?
A: Yes. It is designed to fit standard 8-inch 8040 pressure vessels and can be used as a replacement in compatible NF systems.
Q: Do you supply genuine Vontron 8040 membranes?
A: Yes. All VNF1-8040 membranes from Xi'an Ink-blue Company are supplied with original anti-counterfeiting verification codes.
Q: Can you supply FilmTec™ NF270-8040 as well?
A: Yes. Upon request, we can supply FilmTec™ NF270-8040 membranes to match systems or meet project requirements.
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