SKU: 82397697087

2.5"x21" | 325 GPD | Tape Wrapped | DOW FilmTec RO Membrane

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Description

2.5"x21" | 325 GPD | Tape Wrapped | DOW FilmTec RO MembraneDOW FILMTEC TW30 2521 Brackish Water Reverse Osmosis Membrane Element DOW FILMTEC TW30 2521 Elements produce high quality water for small commercial systems. DOW FILMTEC TW30 2521 elements are tape wrapped. In addition to high quality water and low energy costs, DOW FILMTEC membranes also deliver savings by providing long lasting and reliable performance. DOW FILMTEC Brackish Water Reverse Osmosis Elements can separate salts from water and are





DOW FILMTEC™ TW30-2521 Brackish Water Reverse Osmosis Membrane Element



DOW FILMTEC TW30-2521 Elements produce high quality water for small commercial systems. DOW FILMTEC TW30-2521 elements are tape-wrapped. In addition to high quality water and low energy costs, DOW FILMTEC membranes also deliver savings by providing long lasting and reliable performance.



DOW 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.



DOW FILMTEC TW30-2521 is FDA – 21 CFR 177.2550; Food and Drug Administration Compliant.



Specifications for TW30-2521



FilmTec Product:

TW30-2521


FilmTec Part Number:		 80641
Size (Approximate): 2.5" Dia. x 21"L


Flow Rate:

325 gpd (1.23 m³/d)


Applied Pressure:

225 psig (15.5 bar)


Stabilized Salt Rejection:

99.5%


Active Surface Area:

13 Sq. Ft.


Single Element Recovery:

5%


Exterior:

Tape-Wrapped


Membrane Type:

Polyamide Thin-Film


Composite

Permeate flow and salt rejection based: 2,000 ppm NaCl feed stream, 77°F, 8% recovery, 225 psig.



Operating Limits for TW30-2521



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:

6 gpm (1.4m³/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.



Related Products for use with TW30-2521

PV2521PVCAU

PVC Membrane Housing Pressure Vessel for 2.5" x 21" Membrane Element
PV2521SSAU-316

Stainless Steel Membrane Housing Pressure Vessel for 2.5" x 21" Membrane Element



Benefits of DOW FilmTec Commercial RO Membranes



  • Reverse Osmosis water treatment removes up to 99% of total dissolved solids from water.


  • High flux results in high yields


  • High rejection provides good water quality


  • FilmTec performance and quality



Common Applications for FilmTec TW30-2521 Commercial RO Membranes:



  • Commercial Water Treatment Systems


  • Food Service


  • Medical and Research Institutions


  • Hospitality Industry



Physical Dimensions of DOW FilmTec TW30-2521

INCHES (MM)
A

21.0 (533)
B

1.19 (30)
C

0.75 (19)
D

2.4 (61)

TW30-2521 Fits nominal 25x21 size pressure vessels.

For more information, please visit this products webpage.
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: 82397697087

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Jake Hyatt
Lexington, US
★★★★★ 1
You get what you pay for
Size: XX-Large, Color: Eggshell White Black Mariner Stripe
Like most of the other reviews here, the shirt runs too small and too short. Material was also incredibly uncomfortable. It also wasn't the color I was hoping it would be, but that's on me for not reading the fine print (eggshell white was very much not white) If you're looking at this for a certain costume/cosplay idea, it's probably not what you're looking for.
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Reviewed in the United States on February 18, 2026
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Terrorgod
Omaha, US
★★★★★ 5
Solid fit
Size: X-Large, Color: Eggshell White Black Mariner Stripe
Easy fit, comfortable material. Dont expect it to last forever but at the price its solid for the purpose of a halloween costume.
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Reviewed in the United States on November 1, 2025
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C.L.
Lexington, US
★★★★★ 3
Runs small
Size: X-Large, Color: Navy
Runs small and is short. Nice dark navy color. I ordered a size up and it is still small.
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Reviewed in the United States on February 26, 2026
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Dee
Carnegie, US
★★★★★ 5
Great tee
Size: X-Large, Color: Medium Grey Heather
It’s a nice cotton material…not thin, just perfect. After washing, it also kept its shape.
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Reviewed in the United States on February 18, 2026
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Dan
Dallas, US
★★★★★ 5
Wonderful t-shirts
Size: X-Large, Color: Medium Grey Heather
These t-shirts are well made and have a nice thick feel to them. The sizing is spot on.
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Reviewed in the United States on April 17, 2026

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