S400 HF

Summary

Product identification

The LEWABRANE® RO S400 HF elements are spiral-wound, composite polyamide membrane elements designed for the desalination of seawater. The S400 HF membrane features an extremely durable, highly cross-linked polymeric separating layer, suitable for high salinity, high-pressure applications. These elements are recommended for single-pass and two-pass applications where stable salt rejection performance over the expected lifetime is important.

General Information

• Feed spacer thickness: 0.8 mm (31 mil)
• Membrane area: 37.2 m² (400 ft²)
• Salt rejection, average: 99.8 %
• Salt rejection, minimum: 99.5 %
• Boron rejection, typical: 92.0 %
• Permeate flow rate, average: 34.1 m³/d (9000 gpd)
• Permeate flow rate, minimum: 27.3 m³/d (7200 gpd)

Elements are 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 %.

Element Dimensions

• Length (A): 1016 mm (40 inch)
• Diameter (B): 201 mm (7.9 inch)
• ID (C): 29 mm (1.125 inch)

Operating limits

• Operating pressure, max.: 83 bar (1200 psi)
• Operating temperature, max.: 45°C (113°F)
• Feed water SDI, max.: 5
• pH range during operation: 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

Additional Information

• Handle RO Elements with care; do not drop.
• 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 minutes.
• 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, precipitates, or biological growth.
• Consider cleaning if the pressure drop increases by 20% or water permeability decreases by 10%.
• Use only chemicals that are compatible with the membrane.
• For additional information, consult the Lewabrane® technical information available at the manufacturer's website.

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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