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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
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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
*Maximum temperature for continuous operation above pH 10 is 95°F |
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
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NF90-4040 Fits nominal 4-Inch I.D. pressure vessels.
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4.3 ★★★★★
Based on 16 reviews
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Product Reviews
★★★★★ 5
Outstanding! An absolute must for college students
Format: Paperback
I picked this book up hoping it would prepare me for the job market, which I was already pretty confident about. It was incredibly eye opening, and enlightened me about dozens of things I was overlooking--like using Facebook as my "professional friend" and getting a linkedin account. It was a little stressful seeing how much I could do, but I've been working through the tips one at a time and its really built momentum in my professional brand even as an undergraduate. Now, I have something to do to build my career everyday.
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Reviewed in the United States on February 24, 2012
★★★★★ 5
Most liked
Format: Hardcover
Great book
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Reviewed in the United States on May 12, 2026
★★★★★ 5
Made Me Examine My Own Hidden Prisons -- Powerful and Empowering
Format: Hardcover
I was fortunate to read Shaka's book early, and it stands as one of the most profound self-help books I've ever encountered. The experience reminded me of reading MAN'S SEARCH FOR MEANING -- that rare combination of beautiful, raw writing paired with hard-earned wisdom born from lived experience.
What sets HOW TO BE FREE apart are the "Digging Deeper" sections at the end of each chapter, which offer straightforward, specific guidance for breaking free from the hidden prisons that keep us from reaching our potential. These aren't vague platitudes; they're practical tools you can actually use.
While my privileged upbringing couldn't be more different from the experiences Shaka writes about, I quickly discovered that the hidden prisons he explores -- grief, anger, struggles with forgiveness and vulnerability, etc -- are universal. They affect all of us, regardless of our background or circumstances. As someone who loves introspection, I found myself genuinely engaged in examining my own hidden prisons and what holds me back. The book doesn't just tell you about these barriers -- it makes you want to dig into your own.
What his journey gave me wasn't just insight, but confidence. If he could find his version of freedom from solitary confinement, then I have no excuse not to pursue mine.
The writing itself is incredible -- authentic, compelling, and beautifully crafted. I'd read anything Shaka wrote. This book doesn't just teach you about freedom; it shows you the path to find your own.
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Reviewed in the United States on September 11, 2025
★★★★★ 5
Feeling Stuck in Self-Doubt or Fear? This Book Unlocks the Hidden Prisons Holding You Back!
Format: Hardcover
That’s exactly where I was—stuck in what Shaka calls “Hidden Prisons.” Reading How to Be Free felt like someone handed me the key I didn’t know I already had. This isn’t just another “self-help” book filled with fluffy affirmations. Shaka earned his wisdom the hard way—19 years behind bars, 7 of them in solitary confinement. And yet, out of that darkness, he forged a blueprint for freedom that applies to EVERYONE: CEOs, parents, students, athletes… anyone who’s tired of being stuck.
What I loved most? The book doesn’t just inspire—it gives you tools you can actually use. Daily practices like journaling, mindfulness, and meditation aren’t presented as clichés but as lifelines. I tried just one of the exercises and immediately noticed a shift in my mindset.
🔥 My biggest takeaways:
Your setbacks can fuel your greatest comebacks.
Vulnerability isn’t weakness—it’s power.
Protecting your peace is just as important as chasing success.
True freedom starts in the mind, long before circumstances change.
If you’ve ever battled shame, anger, or the feeling that life is slipping through your fingers—this book is the wake-up call you need. By the time you finish How to Be Free, you won’t just believe change is possible—you’ll have a clear path to living it.
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Reviewed in the United States on September 12, 2025
★★★★★ 5
Profoundly powerful.
Format: Audiobook
I found this book incredibly powerful. A clear, courageous guide to living unbound. An invitation to drop inherited scripts based on adopted norms - think of guilt, grind, respectability - and instead find a path to peace, integrity, and self-trust. I'm a big fan of The Artist’s Way, which helped me unlock creative flow, and How to be Free channels that same liberating energy into life as a whole: how we love, work, heal, and show up every day. It includes simple rituals, helpful reflection prompts, and mindset shifts that make room for full, authentic expression. I already have a long list of friends to give this to.
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Reviewed in the United States on September 12, 2025