SKU: 75285253984

4"x40" | 97% Salt Rejection | 2,000 GPD | FilmTec NF90 Element

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Description

4"x40" | 97% Salt Rejection | 2,000 GPD | FilmTec NF90 ElementDOW 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


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



Specifications for NF90-4040

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:
 Polyamide Thin-Film
Composite

Permeate flow and salt rejection based: 2,000 ppm MgSO4 feed stream, 77°F, 15% recovery, 70 psig.

Operating Limits for NF90-4040

Maximum Operating Temperature: 113°F (45°C)
Maximum Operating Pressure: 600 psig (41 bar)
Maximum Pressure Drop: 16 psig (0.9 bar)
Maximum Feed Flow Rate: 16 gpm (1.4m³/h)
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

*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.

Related Products for use with NF90-4040

PV4040PWG PVC Membrane Housing Pressure Vessel for 4" x 40" Membrane Element
PV4080PWG PVC Membrane Housing Pressure Vessel for (2) 4"x40" Membrane Elements
PV4040SSAU-316 Stainless Steel Membrane Housing Pressure Vessel for 4" x 40" Membrane Element
PV4080SSAU-316 Stainless Steel Membrane Housing Pressure Vessel for (2) 4" x 40" Membrane Element
PV4040SSAW-316 Stainless Steel End-Clamp-Style Membane Housing Pressure Vessels for 4" x 40" Membrane Elements
PV4080SSAW-316 Stainless Steel End-Clamp-Style Membane Housing Pressure Vessels for (2) 4" x 40" Membrane Elements
PV-IN410 Interconnector Coupler for Installing Multiple Elements in a housing - FilmTec part # 89055. Includes two o-rings.

Physical Dimensions of DOW FilmTec NF90-4040

INCHES (MM)
A

40.0 (1,016)
B

1.05 (27)
C

0.75 (19) OD
D

3.9 (99)

NF90-4040 Fits nominal 4-Inch I.D. pressure vessels.


Shipping Notes
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 75285253984

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4.1 ★★★★★
Based on 13 reviews
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Verified Purchase
Marcellita
Draper, US
★★★★★ 5
I am very impressed!
This little frother is perfect and my frappé coffee tastes as if I were sitting at one of the hundreds cute, outside cafés in Thessaloniki. It whips stiff coffee foam in just a few seconds, holds charge for a long time, and appears to be of superior quality. Variable speed control is great, as it prevents the coffee liquid to splash when starting the frothing process. Granted, I have only owned it for about 2 weeks, but I am totally impressed, and hope it'll keep making delicious frappés for me for a long time to come. So far, highly recommend!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 8, 2026
A
Verified Purchase
Amazon Customer
Charlottesville, US
★★★★★ 5
Whips as good as my Nespresso Aerocino!
Love this frother. Whips milk as good as my Nespresso Aerocino! I have tried several that just made light foam, but this one is wonderful. And, rechargeable also. Charge lasts a very long time. Great for travel!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026
M
MJ
Birmingham, US
★★★★★ 4
Solid Upgrade, Needs Color Variety
Replaced my old frother with this one and it's a solid step up. Seriously, better build quality, more features, and noticeably more control. The variable speed dial is genuinely useful. Being able to dial from low (protein powder, matcha) to high (thick cappuccino foam) feels like an actual upgrade. The three whisk attachments give you flexibility depending on what you're making, and the included stand is a nice touch. Helps keeps the coffee bar counter from getting cluttered. Battery life seems strong so far; one charge has lasted through multiple weeks of daily use without issue. Pros: - Variable speed dial works well across a real range (not just "low" and "high") - Three whisk heads included — good for different drink types - Stand included; compact and stays put on the counter Cons: - Singular color option. The mint green clashes with everything on my coffee bar setup; wish there were neutral alternatives. ANY alternatives! - Everyone may not like the price tag but it wasn't out of my budget and the included extra bits made it worth it for me. If your kitchen palette doesn't fight the mint green, this is a capable, well-built frother at a decent price.
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Reviewed in the United States on April 13, 2026
R
Verified Purchase
Ryder Mac
Omaha, US
★★★★★ 5
Mixes matcha well
This is great for mixing matcha due to being able to adjust the speed and make it slower or faster. The stand is a great bonus.
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Reviewed in the United States on May 27, 2026
G
Verified Purchase
gayle johnson
Waukegan, US
★★★★★ 5
Rechargeable hand mixed.
Blends very well and fast. Sound is very quiet. Worth the price. Recommend to friends and family. Recharges fast. Very versitatable i.e eggs, frothing and drink mixes. Good power.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026

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