8"x40" | 6,000 GPD | 99.7% Rejection | FilmTec Seawater Membrane

Item will ship in 5 days.

More Information
Brand DOW Filmtec

DOW FilmTec Membrane Elements

DOW FILMTEC™ SW30HR-380 Seawater RO Elements for Watermakers and Marine Systems

DOW FILMTEC SW30HR-380 Elements are a 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-380 delivers high boron rejection to help customers meet World Health Organization (WHO) and other drinking water standards. DOW FILMTEC SW30HR-380 elements deliver high performance over their operating lifetime without the use of oxidative post-treatments like many competitive products. This is one reason why DOW FILMTEC elements are more durable and may be cleaned more effectively over a wider pH range (1-13) than other RO elements.

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 SW30HR-380 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 SW30HR-380

FilmTec Product: SW30HR-380
FilmTec Part Number: 135137
Size (Approximate): 8" Dia. x 40"L
Flow Rate: 6,000 gpd (23 m³/d)
Applied Pressure: 800 psig (55 bar)
Stabilized Salt Rejection: 99.7%
Minimum Salt Rejection: 99.6%
End Style/PWT: Standard Flush 1.125" ID
Exterior: Hard Shell Fiberglass
Active Membrane Area: 380 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, 77°F, 8% recovery, 800 psig, pH 8.

Operating Limits for SW30HR-380

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 SW30HR-380 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 SW30HR-380 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 SW30HR-380 SWRO

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

SW30HR-380 Fits nominal 8-Inch ID pressure vessels.

For more information, please visit this products webpage.