8"x40" | 7,500 GPD | 99.8% Rejection | FilmTec Seawater Membrane

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Brand DOW Filmtec

DOW FilmTec Membrane Elements

DOW FILMTEC™ SW30HRLE-400 High Rejection High Flux Seawater Desalination RO Elements

DOW FILMTEC SW30HRLE-400 Elements offer rejection and low total cost of water for seawater desalination. The FILMTEC SW30HRLE-400 delivers high performance over the operating lifetime without the use of oxidative post-treatments and provides high NaCl and boron rejection to help meet World Health Organization (WHO) and other drinking water standards.

DOW FILMTEC Seawater Reverse Osmosis 8" Elements separate salts from water and are designed to reduce capital and operational costs of large desalination systems that produce greater than approximately 10 gpm (2300 L/h) of permeate. FilmTec Seawater RO products combine excellent membrane quality with automated precision fabrication, taking system performance to unprecedented levels.

Each element is supplied with one coupler (part number PV-IN810S, 313198) for interconnecting multiple membranes end-to-end in a membrane housing.  Each coupler includes two 3-912 EPR O-rings.

DOW FILMTEC SW30HRLE-400 is FDA – 21 CFR 177.2550; Food and Drug Administration Compliant.

Product Specifications


FilmTec Membranes are FDA Compliant     Genuine DOW FilmTec Membrane Element   



Specifications for SW30HRLE-400

FilmTec Product: SW30HRLE-400
FilmTec Part Number: 217822
Size (Approximate): 8" Dia. x 40"L
Flow Rate: 7,500 gpd (28 m³/d)
Applied Pressure: 800 psig (55 bar)
Stabilized Salt Rejection: 99.8%
Minimum Salt Rejection: 99.65%
Stabilized Boron Rejection: 92.0%
End Style/PWT: Standard Flush 1.125 ID
Exterior: Hard Shell Fiberglass
Active Membrane Area: 400 sq. ft.
Feed Spacer: 28 mil
Product Type: Spiral-Wound Element 
Membrane Type:
Polyamide Thin-
Film Composite 

Permeate flow and salt rejection based:  32,000 ppm NaCl feed stream, 5ppm boron, 77°F, 8% recovery, 800 psig, pH 8.

Operating Limits for SW30HRLE-400

Maximum Operating Temperature: 113°F (45°C)
Maximum Operating Pressure: 1,000 psig (69 bar)
Maximum Pressure Drop: 15 psig (1 bar)
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 SW30HRLE-400 Seawater Elements

Flocon Antiscalant Flocon Antiscalant to prevent scaling in seawater reverse osmosis membrane elements.
AM-11-25 Acid Membrane Cleaner to Remove Scale Buildup and Prolong Membrane Life
AM-22-25 Alkaline  Membrane Cleaner to Remove Organics and Prolong Membrane Life

Benefits of DOW FilmTec Marine RO Membranes:

  • High flux reduces energy use or pressure required
  • High salt rejection results in good quality water
  • High boron rejection
  • FilmTec performance and quality

Common Applications for FilmTec SW30HRLE-400 Seawater RO Elements:

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

Physical Dimensions of DOW FilmTec SW30HRLE-400 SWRO

DOW FilmTec 8-Inch RO Membrane Drawing  
A 40.0 (1,016)
B 1.125 (29)  ID
C 7.9 (99)

SW30HRLE-400 Fits nominal 8-Inch ID pressure vessels.