LewaBrane RO B440 LE

Summary

Product identification

The Lewabrane® RO B440 LE elements are spiral wound, composite polyamide membrane elements. These membranes offer higher permeability than standard pressure RO membranes and are characterized by a lower operating feed pressure, contributing to lower energy consumption (LE = Low Energy). They are designed for industrial and potable water treatment applications, including the treatment of brackish and low salinity waters.

Performance Specifications

Elements are 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 %.

• Membrane area: 40.9 m² (440 ft²)
• Salt rejection, average: 99.5 %
• Salt rejection, minimum: 99.0 %
• Permeate flow rate, average: 38.3 m³/d (10100 gpd)
• Permeate flow rate, minimum: 30.6 m³/d (8100 gpd)

Mechanical / hydraulic

• Feed spacer thickness: 0.7 mm (28 mil)

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.: 41 bar (600 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 water SDI, max.: 5
• Feed flow, max.: 18.0 m³/h (80 gpm)
• Concentrate flow, min.: 2.7 m³/h (12 gpm)

Additional Information

• 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 start-up, 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.

Edition History

• Edition: 2014-02-20
• Previous Edition: 2014-02-17

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Disclaimer: This summary is generated from an extracted text and may not include all figures, footnotes, or the latest revisions present in the official PDF datasheet. For contractual data and the most up-to-date specifications, always refer to the specific OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet