Vontron NF 4040 Membrane
Filtration method: Internal pressure
Operating pressure: 0.3-0.6 (MPa)
Working temperature: 5-45 (℃)
Recovery rate: 15%
Main material: Aromatic polyamide
Products Description
The Vontron NF 4040 nanofiltration membrane is a spiral-wound polyamide membrane designed for selective separation of divalent ions and organic matter.
Available in two models, VNF1-4040 and VNF2-4040, it offers flexible performance options for different treatment requirements:
- VNF1 – lower rejection, higher flux (similar to NF270)
- VNF2 – higher rejection, higher purity (similar to NF90)
The 4040 size is widely used in industrial water treatment systems, offering a balance between performance, cost, and system footprint.
Model Comparison
| Model | Type | Typical NaCl Rejection | MgSO₄ Rejection | Key Feature | Equivalent Model |
|---|---|---|---|---|---|
| VNF1 | Low rejection | ~40–60% | ≥96% | High flux, lower pressure | DuPont FilmTec NF270 |
| VNF2 | High rejection | ~85–95% | ≥95% | Higher purity, better selectivity | DuPont FilmTec NF90 |
The VNF1 series is a single-row selective membrane, capable of perfect single-row removal of sulfate ions, making it more suitable for softening water.
The VNF2 series, on the other hand, is more geared towards reverse osmosis membranes and is suitable for water purification applications.
👉 Selection depends on feed water quality and required permeate standards. Contact us for model recommendation.
Technical Specifications
| Parameter | Value |
|---|---|
| Membrane Type | Polyamide composite |
| Configuration | Spiral wound |
| Effective Area | ~7.5 m² |
| Operating Pressure | 0.3 – 0.8 MPa |
| Max Pressure | 1.6 MPa |
| Max Temperature | 45°C |
| pH Range (Operation) | 3 – 10 |
| pH Range (Cleaning) | 1 – 13 |
| Feed SDI | ≤5 |
Key Features
Selective Removal of Divalent Ions: Effectively removes Ca²⁺, Mg²⁺, and sulfate ions for water softening.
Lower Energy Consumption: Operates at significantly lower pressure than reverse osmosis systems.
Flexible Performance Options: Two models (VNF1 / VNF2) to meet different rejection and flux requirements.
Good Anti-Fouling Performance: Optimized membrane surface reduces fouling tendency.
Standard 4040 Design: Compatible with most 4040 membrane housing.
Applications
Industrial water softening
Drinking water hardness reduction
Textile & dyeing wastewater treatment
Food & beverage processing
Pharmaceutical and chemical separation
Surface water / groundwater treatment
FAQ
Q1: What is the difference between VNF1 and VNF2?
VNF1 provides higher flux with lower salt rejection, while VNF2 offers higher rejection for better water purity.
Q2: Can Vontron NF membranes replace NF270 or NF90 directly?
Yes, they are designed as compatible alternatives in standard 4040 systems.
Q3: When should I choose NF instead of RO?
NF is preferred when partial desalination or hardness removal is required with lower energy consumption.
Hot Tags: Vontron NF 4040 Membrane, China Vontron NF 4040 Membrane manufacturers, suppliers, factory, nf membrane for counter current applications, nf membrane for chemical industry, tubular nf membrane, nf membrane for ammonium removal, nf membrane for chromium removal, nf membrane for air gap applications
Previous
Vontron NF 8040 MembraneYou Might Also Like
Send Inquiry