ENF Series water treatment nanofiltration membrane elements are designed for applications where conventional filtration cannot effectively remove organic matter, color, and multivalent ions.
They are widely applied in municipal and industrial water treatment systems to improve treated water quality while maintaining stable flux and energy-efficient operation.
ENF Series - Water Treatment Nanofiltration Membrane Elements
The ENF Series membranes utilize a precisely engineered nanofiltration separation layer that selectively removes organic contaminants and multivalent ions while allowing beneficial monovalent salts to pass.
This balanced separation capability makes the ENF Series suitable for drinking water treatment, municipal reuse, and industrial water quality upgrading applications.
Key Features
Typical Applications
Water Sources
• Municipal water supply
• Surface water and groundwater
• Treated wastewater for reuse
Industries & Systems
• Drinking water treatment and supply
• Bottled and packaged water production
• Food and beverage processing
• Pharmaceutical and biotechnology industries
• Environmental pollution control and water reuse systems
Membrane Element Working Principle (NF)
Step 1 – Feed Water Inlet
Pretreated water enters the nanofiltration membrane element under moderate operating pressure.
Step 2 – Membrane Separation
Organic matter, color, and multivalent ions are selectively retained, while most monovalent salts pass through the membrane.
Step 3 – Permeate Collection
Clarified permeate water is collected through the central permeate tube for reuse or distribution.
Step 4 – Concentrate Discharge
Concentrated organics and multivalent ions are discharged for further treatment or controlled disposal.
Step 5 – Continuous Operation
The system operates continuously with stable flux and consistent water quality performance.
Technical Specifications
Product Dimensions
| Dimensions | in. (mm) |
| A | 40 (1016) |
| B | 7.9 (201) |
| C | 1.05 (26.7) |
| Model | A | B | C | D |
| in.(mm) | in.(mm) | in.(mm) | in.(mm) | |
| 4040 |
40 (1016) |
3.9 (99.7) |
0.75 (19.1) |
1.05 (26.7) |
| 2540 |
40 (1016) |
2.4 (61) |
0.75 (19.1) |
1.19 (30.2) |
Product Parameters
The following performance data is based on standard testing conditions. Actual performance may vary depending on feed water quality and operating parameters.
| Model |
Permeate Flow |
Stable Rejection | Effective Membrane Area |
||
| GPD | m3/d | % | ft2 | m2 | |
| VNF1-8040 | 10000 | 37.9 | ≥98 | 400 | 37.2 |
| VNF2-8040 | 10500 | 39.7 | ≥97 | 400 | 37.2 |
| VNF1-4040 | 2000 | 7.5 | ≥98 | 90 | 8.4 |
| VNF2-4040 | 2400 | 9.1 | ≥97 | 90 | 8.4 |
| VNF1-2540 | 650 | 2.46 | ≥98 | 28 | 2.6 |
| VNF2-2540 | 750 | 2.84 | ≥97 | 28 | 2.6 |
| Testing Conditions | Operating pressure 100 psi (0.69 MPa) |
|
| Tested at 2000 mg/L MgSO₄ solution |
||
| Temperature at 25℃ |
||
| pH 7.0 ± 0.5 |
||
| Recovery rate at 15% |
||
| Operating Conditions & Limits |
Maximum operating pressure | 600 psi (4.14 MPa) |
| Maximum feedwater flow |
8040-75 gpm (17 m³/h) 4040-16 gpm (3.6 m³/h) 2540-6 gpm (1.4 m³/h) |
|
| Maximum temperature | 45℃ | |
| Maximum feedwater flow SDI15 | 5 | |
| Maximum concentration of free chlorine | <0.1 mg/L | |
| Maximum pressure drop per element | 15 psi (0.1MPa) | |
| Allowed pH range for chemical cleaning | 2-12 | |
| Allowed pH range for feedwater in operation | 3-10 | |
Leave a Message
Scan to wechat :
Scan to Whatsapp :
Product categories
