SKU: 61450459731

4"x40" | 2,400 GPD | Tape Wrapped | DuPont FilmTec RO Membrane (Replaces TW30-4040)

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Description

4"x40" | 2,400 GPD | Tape Wrapped | DuPont FilmTec RO Membrane (Replaces TW30-4040)DUPONT FILMTEC TW30 PRO 4040 Commercial Reverse Osmosis Membrane Element Direct Replacement for FilmTec TW30 4040, which is now obsolete. DUPONT FILMTEC (Formerly DOW FilmTec) TW30 PRO 4040 Elements are the industry standard for reliable operation and production of the highest quality water in commercial applications. This element features the thickest feed spacer (34 mil) available in the industry today to lessen the impact of fouling. DOW FILMTEC


DUPONT FILMTEC™  TW30 PRO-4040 Commercial Reverse Osmosis Membrane Element

 Direct Replacement for FilmTec TW30-4040, which is now obsolete. 

DUPONT FILMTEC (Formerly DOW FilmTec) TW30 PRO-4040 Elements are the industry standard for reliable operation and production of the highest quality water in commercial applications. This element features the thickest feed spacer (34 mil) available in the industry today to lessen the impact of fouling. DOW FILMTEC TW30 PRO-4040 elements are tape-wrapped—built with the same high quality membranes and materials of construction as industrial elements, except for the hard outershell, and are more economical for commercial systems with one or two elements per housing.

FILMTEC Brackish Water Reverse Osmosis Elements can separate salts from water and are produced with an automated fabrication process for precision, consistency, and reliability. DOW FILMTEC RO membranes build on a tradition of leadership in the thin-film composite membrane industry and meet the challenges of higher rejection in lower-pressure operations.

DuPont FILMTEC TW30 PRO-4040 is the direct replacement for TW30-4040 which has been discontinued by the manufacturer.

 

       

 

  

Specifications for TW30 PRO-4040

 

  
FilmTec Product: TW30 PRO-4040
FilmTec Part Number: 12080472
Replaces Products: TW30-4040, 80610
Size (Approximate): 4" Dia. x 40"L
Flow Rate: 2,600 gpd (9.8m³/d)
Applied Pressure: 225 psig (15.5 bar)
Stabilized Salt Rejection: 99.7%
Feed Spacer: 34 mil
Single Element Recovery: 15%
Exterior: Tape-Wrapped
Membrane Type:


 		 Polyamide Thin-Film
Composite
 

  

Permeate flow and salt rejection based:  2,000 ppm NaCl feed stream, 77°F, 15% recovery, 225 psig.

Operating Limits for TW30 PRO-4040

 

  
Maximum Operating Temperature: 113°F (45°C)
Maximum Operating Pressure: 600 psig (41 bar)
Maximum Pressure Drop: 13 psig (0.9 bar)
Maximum Feed Flow Rate: 14 gpm (3.2m³/h)
pH Range, Continuous Operation*: 2-11
pH Range, Short-Term Cleaning**: 1-13
Maximum Feed Silt Density Index: 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.

Benefits of FilmTec Commercial RO Membranes

  • Reverse Osmosis water treatment removes up to 99% of total dissolved solids from water.
  • Thick feed spacer minimizes the impact of fouling
  • High flux results in high yields
  • High rejection provides good water quality
  • FilmTec performance and quality

Common Applications for FilmTec TW30 PRO-4040 Commercial RO Membranes:

  • Commercial Water Treatment Systems
  • Food Service
  • Medical and Research Institutions
  • Hospitality Industry

Physical Dimensions of DOW FilmTec TW30 PRO-4040

 
 

 INCHES (MM)
A

40.0 (1,016)
B

1.05 (27)
C

0.75 (19)
D

3.9 (99)
 

  

TW30 PRO-4040 fits nominal 4x40 size 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: 61450459731

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4.1 ★★★★★
Based on 17 reviews
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Product Reviews
D
Verified Purchase
David L. Lancaster
Carnegie, US
★★★★★ 5
Great!
Color: Black/Black/ Wjite Digital, Color: Black/Black/ Wjite Digital
Great, Just as I remembered them! The only difference is, a shorter band. I thought I had small wrists for a man, but with this band I have to use the last hole to be comfortable . I may add one more hole to the band!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
J
Verified Purchase
Jimmy
Boise, US
★★★★★ 5
Takes a Licking and Keeps on Ticking
Color: Green/Black
I love this watch despite the fact that it is really a toy. I love the look of the watch, I love how lite the weight of the watch is on my wrist, and it really does keep good time if you manage the solar charge properly. Other than looking cool on your wrist, this watch has absolutely no functions other than time keeping. The black plastic bezel is molded into the case and does not turn, so don't plan on using that. The watch has no light, the dial numbers are non-luminous and the hands are very limited in terms of luminosity. No buttons. All you can do is adjust the time and date by pulling out what used to be a winding stem in the good old days. The small tag on the strap with Geographic coordinates shown on it indicate the location of the old Timex manufacturing facility (SW of Waterbury, CT). I have a nice ledge at my bedroom window and it gets good western sun for a good part of the day regardless of the time of year. On this ledge you will find a half dozen solar powered watches (mostly Casio) properly aligned to maximize the charge they may receive each day. Note that the description for this Timex watch specifically states that a lightbulb won't charge this watch. You need direct sunlight for several hours if you want to get more than a 3-week charge into this watch. So, I'll leave you with a couple of tips, my friends; 1.) If you are looking for a first watch to give your outdoorsy oriented Son or Daughter, then give them this one. Why? Because it is cool looking, fairly well built, and it actually works, 2.) After you receive your Timex watch, be sure to keep the display mount it is packaged with. It makes a great fixture to mount your watch on for charging and allows you to maximize the position of the solar cells on the dial so that you can optimize charging time. Have Fun! Jimmy
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 28, 2026
N
Verified Purchase
Nuka Shroom Soup
Belleville, US
★★★★★ 5
Excellent value, flawless performance for well over a year and no signs of quitting.
Color: Green/Black
Excellent value, had this for well over a year and it still keeps perfect time, still water resistant. No worries about having to change batteries. Owned a fancy expensive (battery) watch once and the dept. store repair intentionally sabotaged the watch in the hopes I would purchase another from them. Yeah, good luck with that, lost my business forever. This is the 21st century, cell phones are the new time pieces, but solar is totally reliable and Timex makes it happen. Holds a charge for many months, although I prop it in a bright window for a few days every few months or so just to make sure the cells are always fully charged, although it's probably unnecessary, just being over cautious. I haven't actually experienced this watch ever running out of power even after months of use. Damn impressive, as it should be.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 12, 2025
B
Verified Purchase
Bill
Whiting, US
★★★★★ 4
Good value for solar watch
Color: Black/Orange
Nice watch! It is plastic like but it is solar. No indiglo button only a little luminous on the hands so you don't want to wear it in tje dark and expect to check the time. 45mm case is good size for my wrist and the band works good also, Not too long not too short. Overall a good watch with no problems
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 6, 2026
B
Verified Purchase
Barry Vercueil
Charlottesville, US
★★★★★ 5
Amazing Solar for the price
Color: Black/Orange, Color: Black/Orange
Great watch. Very good visibility. Ligh and feels quality. Easy to swap straps. Same size as my Casio Duro. Highly recommend.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 30, 2026

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