SKU: 5168995954

2.5"x21" | 365 GPD | Low Energy | Tape Wrap | FilmTec Membrane

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Description

2.5"x21" | 365 GPD | Low Energy | Tape Wrap | FilmTec MembraneDOW FILMTEC XLE 2521 Low Energy 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





DOW FILMTEC™ XLE-2521 Low Energy 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 XLE-2521 is FDA – 21 CFR 177.2550; Food and Drug Administration Compliant.



Specifications for XLE-2521



FilmTec Product:

XLE-2521


FilmTec Part Number:

154530
Size (Approximate): 2.5" Dia. x 21"L


Flow Rate:

365 gpd (1.38 m³/d)


Applied Pressure:

100 psig (6.9 bar)


Stabilized Salt Rejection:

99.0%


Active Surface Area:

13 Sq. Ft.


Single Element Recovery:

10%
Exterior:

Tape-Wrapped


Membrane Type:

Polyamide Thin-Film


Composite

Permeate flow and salt rejection based: 500 ppm NaCl feed stream, 77°F, 8% recovery, 100 psig.



Operating Limits for XLE-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:

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 XLE-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



  • Lower Operating Pressure reduces power consumption, lowering the cost of equipment and operation.


  • 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 XLE-2521 Commercial RO Membranes:



  • Commercial Water Treatment Systems


  • Food Service


  • Medical and Research Institutions


  • Hospitality Industry



Physical Dimensions of DOW FilmTec XLE-2521

INCHES (MM)
A

21.0 (533)
B

1.19 (30)
C

0.75 (19)
D

2.4 (61)

XLE-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: 5168995954

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Kindle Customer
San Leandro, US
★★★★★ 5
Heavy duty dog toys
Color: Blue-Green-Orange
Excellent quality and size was moderate for a puppy that's 5 months old however she's a heavy chewer and they're absolutely are holding up beautifully definitely recommend the purchase
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 7, 2025
S
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Shaun Lanier
Waukegan, US
★★★★★ 4
Fun
Color: Blue-Green-Orange
Dog fun
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026
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Verified Purchase
LetsGetReal
Lowell, US
★★★★★ 5
Perfect for Aggressive Chewers
Color: Blue-Green-Orange
I've been looking for toys my German Shepherd puppies can't tear apart or chew into little bits within minutes. These are tough enough to stand up to them and have the added benefit of helping their teeth with the little surface nubs. This is the second set I've purchased - not because the puppies destroyed them, but because they needed a set for inside as well as outside. I HIGHLY recommend these toys if your dog is a destruction machine!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 16, 2026
J
Verified Purchase
Julie A Hagerman
Bozeman, US
★★★★★ 5
Durable, sensory texture
Color: Blue-Green-Orange
These are fantastic. They are durable and high quality. My dog loves the sensory texture and they satisfy his aggressive chewing. I've bought other high-end, popular brands and he chewed through it in less than two hours. I would definitely buy these again (if I even had to)!
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Reviewed in the United States on August 30, 2025
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Verified Purchase
Chisme28
Battle Creek, US
★★★★★ 5
Best purchase
Color: Blue-Green-Orange
These are by far one of the best toys for my aggressive chewer. My pitbull mix loves the football & ball, gave the other toy to my niece's dog. Bought them in Nov/Dec and they have held up great, still look new. I was upset when I saw they are no longer available. I would have purchased more to have some for specific outdoor use.
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Reviewed in the United States on April 20, 2026

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