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DOW FilmTec Membranes
DOW FILMTEC Seawater Desalination RO Elements

DOW FILMTEC offers a variety of premium grade seawater reverse osmosis elements featuring both high active area and high salt rejection to offer long-term economics for seawater desalination systems. SW30 seawater membrane elements have one of the highest flow rates available to meet the water demands of both sea-based and land-based desalinators. DOW FILMTEC SW30 membrane elements may also be operated at lower pressure to reduce pump size, cost, and operating expenses. DOW FILMTEC seawater membrane elements are more durable and may be cleaned more effectively over a wider pH range (1-13) than other RO elements.

Benefits of DOW FilmTec Seawater RO Membrane Elements

  • Create drinking water from seawater.
  • High Salt rejection for high quality permeate  .
  • HR elements offer high boron rejection to help customers meet World Health Organization (WHO) and other drinking water standards
  • SW30 elements provide longer life due to high cleanability.
  • Reduced system cost and operating expenses when operated at lower pressures.
  • iLEC™ interlocking elements are available in for 8” elements and offer the following benefits:
    • Reliable and long-term seal integrity – The single, non-sliding seal reduces the number of potential leak sites and is evenly compressed upon installation.
    • Leak-tight performance – The iLEC design eliminates the possibility of o-rings being rolled from their grooves or pinched and damaged during operation.
    • Lubricant-free operation – Omission of o-ring lubricant to preserve permeate quality, such as in ultra-pure water applications, will not compromise sealing performance.
    • Backward compatibility – Compatibility with existing hardware is maintained.  The smooth inner bore located at each end of the permeate collection tube is unchanged, permitting insertion of sliding couplers and existing vessel adapters.  The net length of the elements, when connected, remains 40 inches.
    • Reduced permeate pressure drop – Internal couplers and vessel adapters account for more than 70 percent of the permeate-tube pressure drop in some systems. The interlocking endcap design minimizes these restrictions, imposing less permeate backpressure.

FilmTec Seawater Deslaination Membranes - Commercial and Small Commercial Sized

Model No.

Permeate Flow Rate

Size
(Dia.”× Length”)

Active Surface Area
(Sq. Ft.)

Single Element Recovery (%)

Applied Pressure (psi)

Stabilized Salt Rejection (%)

gpd

m³/d

SW30-2514

150

0.6

2.5” × 14”

6.5

2

800

99.4

SW30-2521

300

1.1

2.5” × 21”

13

4

800

99.4

SW30-2540

700

2.6

2.5” × 40”

29

8

800

99.4

SW30-4021

800

3.0

4.0” × 21”

33

4

800

99.4

SW30-4040

1,950

7.4

4.0” × 40”

80

8

800

99.4

 Note:  SW30HRLE-4040 has been discontinued by the manufacturer and is no longer available.   SW30-4040 is the recommended replacement.

 

FilmTec HR, XHR, HRLE – High Salt & Boron Rejection  Seawater Desalination RO Membranes

The DOW FILMTEC SW30HR product line includes premium grade seawater reverse osmosis element featuring both high active area and high salt rejection to offer the best long-term economics for seawater deslination systems. DOW FILMTEC SW30HR delivers high boron rejection to help customers meet World Health Organization (WHO) and other drinking water standards.

Model No.

Permeate Flow Rate

Size
(Dia.”× Length”)

End Style

Active Surface Area
(Sq. Ft.)

Feed Spacer Thickness
(mil)

Salt Rejection (%)

Stabilized Boron Rej. (%)

gpd

m³/d

Stabilized

Min.

SW30HR-380

6,000

23

8”×40”

Standard

380

28

99.70

99.6

92.0

SW30HRLE-400

7,500

28

8”×40”

Standard

400

28

99.75

99.6

91.0

SW30XHR-400i

6,000

23

8”×40”

iLEC Interconnecting

400

28

99.82

99.70

93

SW30HRLE-370/34i

6,700

25

8”×40”

iLEC Interconnecting

370

34

99.80

99.65

92

SW30HRLE-400i

7,500

28

8”×40”

iLEC Interconnecting

400

28

99.80

99.65

92

SW30HRLE-440i

8,200

31

8”×40”

iLEC Interconnecting

440

28

99.80

99.65

92

FilmTec XLE & ULE – Low Energy Seawater Desalination RO Membranes 

DOW FILMTEC SW30XLE & SW30ULE elements offer a good combination of productivity and rejection resulting in a low energy seawater element and low operating cost. It is ideal for two-pass seawater designs and high TDS brackish water applications. DOW FILMTEC SW30XLE elements come with iLEC™ Interlocking Endcaps that reduce system operating costs and reduce the risk of o-ring leaks that cause poor water quality.

Model No.

Permeate Flow Rate

Size
(Dia.”× Length”)

End Style

Active Surface Area
(Sq. Ft.)

Feed Spacer Thickness
(mil)

Salt Rejection (%)

Stabilized Boron Rej. (%)

gpd

m³/d

Stabilized

Min.

SW30XLE-440i

9,900

38

8”×40”

iLEC Interconnecting

440

28

99.80

99.65

88

SW30ULE-400i

11,000

42

8”×40”

iLEC Interconnecting

400

28

99.70

99.60

87

SW30ULE-440i

12,000

45

8”×40”

iLEC Interconnecting

440

28

99.70

99.60

89

The above benchmark values are based on the following test conditions: 32,000 ppm NaCl, 5 ppm Boron, 800 psi (5.5 MPa), 77°F (25°C), pH 8 and 8% recovery.  Permeate flows for individual elements may vary +/-15%.  Product specifications may vary slightly as improvements are implemented.

DOW FilmTec Seawater SWRO Element Features

  • High Flux Results in High Yields
  • High Rejection Results in Excellent Water Quality
  • High Boron Rejection
  • Durable With Good Cleanability For Long Element Life
  • FilmTec Performance And Quality
  • 8” x 40” models are available in iLEC interlocking style for direct connection of membranes in multi-element housings.
  • DOW FILMTEC Seawater RO membrane elements are FDA – 21 CFR 177.2550; Food and Drug Administration Compliant
DOW FilmTec Membranes are FDA Compliant

filmtec_dow_interlocking_membranes

filmtec_dow_ilec_interlocking_membranes

Applications for DOW FilmTec Seawater RO Membrane Elements

  • Seawater Desalination
  • Municipal Drinking Water
  • Small Desalination Systems
  • Industrial Desalination
  • Yachts
  • Boats
  • Cruise Ships
  •  Hotels
  • Resorts
  • Navy
  • Off-Shore Platforms
  • Portable Systems for Military Operation
  • Wide Variety of Other Marine Applications

Related Products for DOW FilmTec Seawater RO Membrane Elements

Product Data Sheets for DOW FilmTec Seawater RO Membrane Elements

FDA Compliance Letter for DOW FilmTec Seawater RO Element

FilmTec iLEC Interlocking Element End Cap Information