Bumblebee Linens

Dow Filmtec SW30-4040

Dow Filmtec SW30-4040
Dow Filmtec SW30-4040

Improved DOW FILMTEC™ seawater reverse osmosis elements offer the highest productivity while maintaining excellent salt rejection.

• FILMTEC SW30 membrane elements have the highest flow rates available to meet the water demands of both sea-based and land-based desalinators.
• FILMTEC SW30 elements may also be operated at lower pressure to reduce pump size, cost and operating expenses.
• Improved FILMTEC seawater membrane combined with automated, precision element fabrication result in the most consistent product performance available.

Product Type
Polyamide Thin-Film Composite

40 in x 3.9 in

Product Specifications

Flow Rate
Rejection (%)
(psig) (bar) (GPD) (m³/h)
 800 55 1,950 7.4 99.4
  1. Permeate flow and salt rejection based on the following test conditions: 32,000 ppm NaCl, pressure specified above, 77°F (25°C) and the following recovery rates;
    SW30-2514 – 2%, SW30-2521 & SW30-4021 – 5%, SW30-2540 & SW30-4040 – 8%.
  2. Permeate flows for individual elements may vary ± 20%.
  3. For the purpose of improvement, specifications may be updated periodically.

Operating and Cleaning Limits

Operating Temperature
Operating Pressure
Pressure Drop
pH Range,
Continuous Operation
pH Range,
Short-Term Cleaning (30 min.)
Maximum Feed
Silt Density
Index (SDI)
113°F (45°C) 1,000 psig (69 bar) 15 psig (1.0 bar) 2 – 11 1 – 13 SDI 5 < 0.1 ppm

• Maximum temperature for continuous operation above pH 10 is 95°F (35°C).
• Refer to Cleaning Guidelines in specification sheet 609-23010.
• 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 FILMTEC recommends removing residual free chlorine by pretreatment prior to membrane exposure. Please refer to technical bulletin 609-22010 for more information.

Equivalent Products

Hydranautics: SWC5-LD-4040, SWC5-4040
Toray: TM810V
GE: AE-90