DOW FilmTec Nanofiltration Membrane Elements
- NF90 Nanofiltration elements offer nanofiltration technology that selectively removes these components, color and operates at low operating pressures
- NF270 Nanofiltration elements offer organic removal with partial softening in order to maintain a minimum level of hardness for organoleptic properties and preservation of distribution networks
DOW FilmTec 2.5x40 Nanofiltration Membrane Elements
Model |
FilmTec Part No. |
Permeate Flow Rate |
Active Area |
Applied Pressure |
Nominal Size(Dia.×L) |
Stabilized Salt Rejection |
NF270-2540 |
149986 |
850 gpd |
(3.2 m3/d) |
28 ft2(2.6 m2) |
70 psig (4.8 bar) |
2.5"×40" |
>97.0% |
NF90-2540 |
149982 |
680 gpd |
(2.6 m3/d) |
not published |
70 psig (4.8 bar) |
2.5"×40" |
>97.0% |
Permeate Flow and salt rejection based on test conditions: 2,000 ppm MgSO4, 77°F (25°C) and 15% recovery at the pressure specified above. Flows for individual elements may vary by -20%/+30%. Developmental products available for sale.
DOW FilmTec 4x40 Nanofiltration Membrane Elements
Model |
FilmTec Part No. |
Permeate Flow Rate |
Active Area |
Applied Pressure |
Nominal Size (Dia.×L) |
Stabilized Salt Rejection |
NF270-4040 |
149987 |
2,500 gpd |
(9.5 m3/d) |
82 ft2(7.6 m2) |
70 psig (4.8 bar) |
4"×40" |
>97.0% |
NF90-4040 |
149983 |
2,000 gpd |
(7.6 m3/d) |
not published |
70 psig (4.8 bar) |
4"×40" |
>97.0% |
Permeate Flow and salt rejection based on test conditions: 2,000 ppm MgSO4, 77°F (25°C) and 15% recovery at the pressure specified above. Flows for individual elements may vary by -15%/+50%. Developmental products available for sale.
DOW FilmTec 8-Inch Nanofiltration Membrane Elements
Model |
Permeate Flow Rate |
Active Area |
Feed Spacer |
Nominal Size (Dia.×L) |
Stabilized Salt Rejection |
Minium Salt Rejection |
NF270-400/34i |
12,500 gpd |
(47 m3/d) |
400 ft2(37 m2) |
34 mil LDP |
8"×40" |
>97.0% |
97.0% |
NF90-400/34i |
10,000 gpd |
(38 m3/d) |
400 ft2(37 m2) |
34 mil LDP |
8"×40" |
>97.0% |
98.7% |
Permeate Flow and salt rejection based on test conditions: 2,000 ppm MgSO4, 77°F (25°C) and 15% recovery at the pressure specified above. Flows for individual elements may vary by +/-15%. Stabilized rejection is generally achieved within 24-48 hours of continuous use; depending upon feedwater characteristics and operating conditions. active area guaranteed +/- 3%.
Discontinued DOW FilmTec Nanofiltration Elements
The DOW FilmTec 8-inch Nanofiltration Elements have been discontinued and replaced with the iLEC interlocking end-cap models. These will fit in existing installations, without the need for interconnectors between elements in multi-element housings. (Additional information on interlocking endcap elements can be found in the literature section on this page.) The below specifications are for reference only.
Discontinued Model |
Replaced by Model |
Endcap Style |
Active Area |
Nominal Size (Dia.×L) |
Stabilized Salt Rejection |
Original |
Replacement |
NF270-400 |
NF270-400/34i |
Standard |
iLEC |
400 ft2 (37 m2) |
8"×40" |
>97.0% |
NF90-400 |
NF90-400/34i |
Standard |
iLEC |
400 ft2 (37 m2) |
8"×40" |
>97.0% |
Related Products for Use with FilmTec NF Elements