LewaBrane RO S440 HR

Summary

Edition: 2014-05-23

Product identification

Lewabrane® RO S440 HR elements are spiral-wound, composite polyamide membrane elements designed for the desalination of seawater. The S440 HR membrane features an extremely durable, highly cross-linked polymeric separating layer, suitable for high salinity and high-pressure applications. It is recommended for single-pass applications where stable salt rejection performance over the expected operating lifetime is important.

Operating limits

• Operating pressure, max.: 83 bar (1200 psi)
• Operating temperature, max.: 45°C (113°F)
• Feed flow, max.: 18.0 m³/h (80 gpm)
• Concentrate flow, min.: 2.7 m³/h (12 gpm)
• pH range during operating: 2 - 11
• pH range during cleaning: 1 - 12
• Pressure drop per element, max.: 1.0 bar (15 psi)
• Pressure drop per vessel, max.: 3.5 bar (50 psi)
• Chlorine concentration, max.: 0.1 ppm

Feed water

• SDI, max.: 5

Product water

The element is tested under the following conditions: applied pressure 55.2 bar (800 psi), NaCl concentration 32,000 mg/l (or when tested on a mixed solution of 32,000 mg/l NaCl and 5 mg/l Boron), operating temperature 25 °C (77 °F), pH 8, and recovery rate 8 %.

• Salt rejection, av.: 99.8 %
• Salt rejection, min: 99.5 %
• Boron rejection, typical: 93.0 %
• Permeate flow rate, av.: 27.3 m³/d (7200 gpd)
• Permeate flow rate, min.: 21.8 m³/d (5760 gpd)

Mechanical / hydraulic

• Feed spacer thickness: 0.7 mm (28 mil)
• Membrane area: 40.9 m² (440 ft²)
• Element Dimensions:
  • Length (A): 1016 mm (40 inch)
  • Diameter (B): 201 mm (7.9 inch)
  • ID (C): 29 mm (1.125 inch)

Additional Information

• Treat RO Elements with care; do not drop the element.
• Each RO Element is wet tested, preserved in a 1% weight sodium bisulfite solution, and vacuum packed in oxygen barrier bags.
• During storage, avoid freezing and direct sunlight. The temperature should be below 35 °C (95 °F).
• After installation, keep the RO Elements wet, and use a compatible preservative for storage durations longer than 7 days.
• During the initial start-up, discharge the first permeate to drain for 30 min.
• Permeate back pressure should not exceed feed pressure at any time.
• Consider cleaning if the pressure drop increases by 20% or water permeability decreases by 10%.
• Use only chemicals compatible with the membrane.

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

Official datasheet (PDF)

PDF datasheet