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NF(Nano-filtration) Membranes
DownloadBrief Introduction
The NF Series of nanofiltration membrane elements can achieve high permeate water and excellent desalination performance. Therefore, it is suitable for large-scale industrial and municipal water treatment systems. In use, it shows excellent ability to remove pesticides, viruses, and bacteria. It has a high ability to remove natural organic substances and a medium ability to remove total hardness. Through innovative technology, the product has a stronger film surface, strong anti-oxidation performance, and the use of ultra-low pressure mode of operation can significantly improve the system and operational economy.
Scope of Application
It is mainly used in various ffelds of industry, such as pure water, boiler recharge water, food processing and pharmaceutical manufacturing.
- NF series of membrane elements performance
|
Model |
Membrane ft2 (m2) |
Average Permeate GPD(m3/d) |
Stable Rejection % |
Min. Rejection % |
|
RM-NF-4040 |
85 (7.9) |
2200 (7.9) |
55~75 |
- |
|
RM-NF-8040 |
400 (37) |
9000 (33.9) |
55~75 |
- |
- NF series of membrane elements Testing Conditions
|
Testing Pressure |
70 psi (0.48MPa) |
|
Temperature of Testing Solution |
25 ℃ |
|
Concentration of Testing Solution (NaCl) |
2000ppm NaCl；2000ppm MgSO4 |
|
pH Value of Testing Solution |
8 |
|
Recovery Rate of Single Element |
15% |
- NF series of membrane elements Operation Limits & Conditions
|
Max. Working Pressure |
600psi (4.14MPa) |
Max. Feed Water COD |
10ppm |
|
Max. Feed Water Flow |
75 gpm (17m3/h) for 8040 |
Max. Feed Water BOD |
5ppm |
|
Max. Feed Water TOC |
10ppm |
||
|
Max. Feed Water Temperature |
45°C |
Residual Chlorine Concentration of Feed Water |
<0.1 ppm |
|
Max. Feed Water TDS |
2000ppm |
pH Range of Feed Water During Continuous Operation |
3~10 |
|
ax. Feed Water Hardness |
60ppm |
Max. Pressure Drop of Single Element |
15psi (0.1MPa) 8040、4040 |
|
Max. Feed Water SD 115 |
5 |
||
|
Max.Turbidity NTU |
1.0 |
Note:
1. For the recommended design scope, please refer to the latest version of the technical manual, design guide, or consult with membrane technology experts. If the user does not strictly follow the operating conditions provided by the sample, Suzhou Runmo Water Treatment Technology Co., Ltd. will not bear all the consequences arising therefrom.
2. The average water yield listed in the table shows that the error of water yield of a single membrane element in series is within (+10%).
The difference between the minimum water yield and the nominal value of other series of single membrane elements is not more than 20% of the nominal value.
3. Wet membrane components are strictly tested before they leave the factory. They are stored in 1.0% sodium bisulfite solution. Then they are packed in vacuum and packed in cardboard boxes. The safe storage temperature of wet membrane components is 4-45 °C.
4. RO production water to be discharged in the first hour of operation.
5. During storage and operation, it is prohibited to add any chemicals that affect membrane components. In case of violating the use of such chemicals, Suzhou Runmo Water Treatment Technology Co., Ltd. will not bear all the consequences arising therefrom.
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