BW30-4021

Summary

Product identification

FilmTec™ Seawater RO Elements are polyamide thin-film composite reverse osmosis elements designed for marine systems. These SW30 membrane elements offer high productivity and excellent salt rejection for both sea-based and land-based desalinators, and can be operated at lower pressures to reduce costs.

This summary specifically covers the SW30-4021 product, Part Number 80740.

Typical Properties (SW30-4021)

• Applied Pressure: 800 psig (55 bar)
• Permeate Flow Rate: 800 gpd (3.0 m³/d)
• Stabilized Salt Rejection: 99.4%

Test conditions for these properties were: 32,000 ppm NaCl, 77°F (25°C), and 5% recovery. Permeate flows for individual elements may vary +/-20%.

Mechanical / Hydraulic

• Maximum Feed Flow Rate: 16 gpm (3.6 m³/h)
• Dimensions (approximate, see PDF for diagram):
  • A: 21.0 inches (533 mm)
  • B: 1.05 inches (26.7 mm)
  • C: 0.75 inches (19 mm)
  • D: 3.9 inches (99 mm)
• Fits nominal 4-inch I.D. pressure vessel.
• Maximum Operating Pressure: 1,000 psi (69 bar)
• Maximum Pressure Drop (per element): 15 psig (1.0 bar)
• Maximum Pressure Drop (across entire pressure vessel housing): 50 psi (3.4 bar)

Operating Limits

• Membrane Type: Polyamide Thin-Film Composite
• Maximum Operating Temperature: 113°F (45°C)
  • Maximum temperature for continuous operation above pH 10 is 95°F (35°C).
• pH Range:
  • Continuous Operation: 2 - 11
  • Short-Term Cleaning: 1 - 13
• Maximum Feed Silt Density Index (SDI): 5
• Free Chlorine Tolerance: <0.1 ppm

Operation Guidelines

• Start-up:
  • Avoid abrupt pressure or cross-flow variations.
  • Feed pressure should be increased gradually over 30-60 seconds.
  • Cross-flow velocity should be achieved gradually over 15-20 seconds.
• Keep elements moist at all times after initial wetting.
• For prolonged system shutdowns, elements should be immersed in a preservative solution.
• Avoid static permeate-side backpressure at all times.
• The permeate obtained from the first hour of operation should be discarded.
• The use of this product does not necessarily guarantee the removal of cysts and pathogens; effective reduction depends on complete system design, operation, and maintenance.

Disclaimer

This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions found in the official PDF datasheet. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet