S085 HF 4040

Summary

Product identification

The LEWABRANE® RO S085 HF 4040 elements are spiral-wound, composite polyamide membrane elements designed for seawater desalination. The S085 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 is a key consideration.

General Information

• Feed spacer thickness: 0.8 mm (31 mil)
• Membrane area: 7.9 m² (85 ft²)
• Salt rejection, average: 99.8 %
• Salt rejection, minimum: 99.5 %
• Boron rejection, typical: 92.0 %
• Permeate flow rate, average: 7.2 m³/d (1910 gpd)
• Permeate flow rate, minimum: 5.8 m³/d (1530 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 %.

Operating limits

• Operating pressure, maximum: 83 bar (1200 psi)
• Operating temperature, maximum: 45 °C (113 °F)
• pH range during operating: 2 - 11
• pH range during cleaning: 1 - 12
• Pressure drop per element, maximum: 1.0 bar (15 psi)
• Pressure drop per vessel, maximum: 3.5 bar (50 psi)
• Chlorine concentration, maximum: 0.1 ppm

Feed water

• Feed water SDI, maximum: 5
• Chlorine concentration, maximum: 0.1 ppm

Product water

• Salt rejection, average: 99.8 %
• Salt rejection, minimum: 99.5 %
• Boron rejection, typical: 92.0 %

Mechanical / hydraulic

Element Dimensions:

• A (Length): 1016 mm (40 inch)

• B (Diameter): 100 mm (3.9 inch)

• C (OD): 19 mm (0.75 inch)

• D (Length): 26 mm (1.05 inch)

• Operating pressure, maximum: 83 bar (1200 psi)

• Pressure drop per element, maximum: 1.0 bar (15 psi)

• Pressure drop per vessel, maximum: 3.5 bar (50 psi)

Additional Information

• Treat 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 duration longer than 7 days.
• During 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 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 text extracted from a PDF datasheet. This extraction may miss figures, footnotes, or later revisions of the document. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet