DOW FILMTEC™ SW30-4021 Seawater RO Elements for Watermakers and Marine Systems
DOW FILMTEC SW30-4021 elements have one of the highest flow rates available to meet the water demands of both sea-based and land-based desalinators. Commonly used in on-board Watermakers to create drinking water from seawater for yachts, boats, and cruise ships, DOW FILMTEC marine SWRO elements offer the highest productivity while maintaining excellent salt rejection. DOW FILMTEC SW30 elements may also be operated at lower pressure to reduce pump size, cost, and operating expenses
DOW FILMTEC SW30-4021 is FDA – 21 CFR 177.2550; Food and Drug Administration Compliant.
 
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Specifications for SW30-4021
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FilmTec Product: |
SW30-4021 |
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FilmTec Part Number: |
80740 |
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Size (Approximate): |
4" Dia. x 21"L |
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Flow Rate: |
800 gpd (3.0 m³/d) |
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Applied Pressure: |
800 psig (55 bar) |
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Stabilized Salt Rejection: |
99.4% |
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Exterior: |
Hard Shell Fiberglass |
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Active Membrane Surface Area: |
33 sq. ft. |
Membrane Type:
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Polyamide Thin-Film
Composite |
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Permeate flow and salt rejection based: 32,000 ppm NaCl feed stream, 77°F,5% recovery, 800 psig.
Operating Limits for SW30-4021
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Maximum Operating Temperature: |
113°F (45°C) |
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Maximum Operating Pressure: |
1,000 psig (69 bar) |
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Maximum Pressure Drop: |
15 psig (1 bar) |
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Maximum Feed Flow Rate: |
16 gpm (1.4m³/h) |
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pH Range, Continuous Operation*: |
2-11 |
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pH Range, Short-Term Cleaning**: |
1-13 |
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Maximum Feed Silt Density Index: |
SDI 5 |
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Fere Clorine Tolerance***: |
<0.1ppm |
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*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.
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