LewaBrane RO B085 LE 4040

Summary

Product identification

The Lewabrane® RO B085 LE 4040 elements are spiral wound, composite polyamide membrane elements. These are designed with higher permeability than standard pressure RO membranes, characterized by a lower operating feed pressure, leading to lower energy consumption (LE = Low Energy). They are suitable for industrial and potable water treatment applications, including brackish and low salinity waters.

Performance Data (as tested)

The element is tested under the following conditions: applied pressure 10.3 bar (150 psi), NaCl concentration 2000 mg/l, operating temperature 25 °C (77 °F), pH 7, and recovery rate 15 %.

• Feed spacer thickness: 0.86 mm (34 mil)
• Membrane area: 7.9 m² (85 ft²)
• Salt rejection, average: 99.5 %
• Salt rejection, minimum: 99.0 %
• Permeate flow rate, average: 7.4 m³/d (2000 gpd)
• Permeate flow rate, minimum: 5.9 m³/d (1600 gpd)

Element Dimensions

• Length (A): 1016 mm (40 inch)
• Diameter (B): 100 mm (4.0 inch)
• OD (C): 19 mm (0.75 inch)
• Length (D): 26 mm (1.05 inch)

Operating limits

• Operating pressure, maximum: 41 bar (600 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

• SDI, maximum: 5
• Feed flow, maximum: 4.0 m³/h (18 gpm)
• Concentrate flow, minimum: 0.6 m³/h (3 gpm)

Maintenance and Care

• 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 initial startup, discharge the first permeate to drain for 30 minutes.
• 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 which are compatible with the membrane.

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the official PDF. The data for contractual purposes must match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet