S400 HR

Summary

Product identification

LEWABRANE® RO S400 HR elements are spiral-wound, composite polyamide membrane elements designed for the desalination of seawater. The S400 HR membrane is characterized by an extremely durable, highly cross-linked polymeric separating layer suitable for high salinity, high pressure applications. The element is recommended for single pass applications where stable salt rejection performance during the expected operating lifetime is an important consideration.

Key specifications (tested under 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 %):

• Membrane area: 37.2 m² (400 ft²)
• Salt rejection, average: 99.8 %
• Salt rejection, minimum: 99.5 %
• Boron rejection, typical: 93.0 %
• Permeate flow rate, average: 24.6 m³/d (6500 gpd)
• Permeate flow rate, minimum: 19.7 m³/d (5200 gpd)

Operating limits

• Operating pressure, max.: 83 bar (1200 psi)
• Operating temperature, max.: 45 °C (113 °F)
• 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

• Feed spacer thickness: 0.8 mm (31 mil)
• SDI, max.: 5

Mechanical / hydraulic

• 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 duration 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.
  • The RO Elements shall be maintained in a clean condition, unfouled by particulate matter or precipitates or biological growth.
  • Consider cleaning, if the pressure drop increases by 20% or water permeability decreases by 10%.
  • Use only chemicals which are compatible with the membrane.

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Disclaimer: This summary is based on the provided text extract. The full OEM PDF datasheet may contain additional figures, footnotes, or more recent revisions. Contractual data must match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet