DOW FILMTEC™ NF90-4040 Nanofiltration (NF) Membrane Elements for Commercial Systems
The DOW FILMTEC NF90-4040 membrane elements provide high productivity performance while removing a high percentage of salts, nitrate, iron and organic compounds such as pesticides, herbicides and THM precursors. The low net driving pressure of the FilmTec NF90-4040 membrane allows the removal of these compounds at low operating pressures. DOW FILMTEC NF90-4040 has a fiberglass outer wrap.
DOW FILMTEC NF90-4040 is FDA – 21 CFR 177.2550; Food and Drug Administration Compliant.
 
Common Applications for FilmTec NF90-4040 Nanofiltration Elements:
- Production of Drinking Water
- Demineralization in Small Commercial Applications
Benefits of DOW FilmTec Commercial NF Membranes
- High flux results in high yields
- Low energy usage reduces power consumption and costs
- Durable with good cleanability for long element life
- FilmTec performance and quality
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Specifications for NF90-4040
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| FilmTec Product: |
NF90-4040 |
| FilmTec Part Number: |
149983 |
| Size (Approximate): |
4" Dia. x 40"L |
| Flow Rate: |
2,000 gpd (7.6 m³/d) |
| Applied Pressure: |
70 psig (4.8 bar) |
| Stabilized Salt Rejection: |
>97% |
| Single Element Recovery: |
15% |
| Exterior: |
Hard Shell Fiberglass |
Membrane Type:
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Polyamide Thin-Film
Composite |
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Permeate flow and salt rejection based: 2,000 ppm MgSO4 feed stream, 77°F, 15% recovery, 70 psig.
Operating Limits for NF90-4040
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| Maximum Operating Temperature: |
113°F (45°C)
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| Maximum Operating Pressure: |
600 psig (41 bar) |
| Maximum Pressure Drop: |
16 psig (0.9 bar) |
| Maximum Feed Flow Rate: |
16 gpm (1.4m³/h)
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| pH Range, Continuous Operation*: |
2-11 |
pH Range, Short-Term Cleaning**: |
1-13 |
| Maximum Feed Silt Density Index: |
SDI 5 |
| Fere Clorine Tolerance***: |
<0.1ppm |
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*Maximum temperature for continuous operation above pH 10 is 95°F
**Refer to cleaning guidelines.
***Under certain conditions, the presence of free chlorine and other oxidizing agents will cause premature membrane failure. Since oxidation damage is not covered under warranty, Dow recommends removing residual free chlorine by pretreatment prior to membrane exposure.
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