LewaBrane RO B085 FR 4040

Summary

Product identification

The Lewabrane® RO B085 FR 4040 elements are spiral wound, composite polyamide membrane elements, designed for industrial water treatment applications. These FR elements provide more turbulence in the feedwater spacer in combination with the high crosslinked low surface charge Lewabrane membrane. They are recommended for brackish and low salinity feedwaters that are expected to have higher biological and organic fouling tendencies.

Performance Specifications

The element is tested under the following conditions: applied pressure 15.5 bar (225 psi), NaCl concentration 2000 mg/l, operating temperature 25 °C (77 °F), pH 7 and recovery rate 15 %.

• Membrane area: 7.9 m² (85 ft²)
• Salt rejection, average: 99.5 %
• Salt rejection, minimum: 99.0 %
• Permeate flow rate, average: 8.9 m³/d (2400 gpd)
• Permeate flow rate, minimum: 7.1 m³/d (1900 gpd)

Operating limits

• Operating pressure, maximum: 41 bar (600 psi)
• Operating temperature, maximum: 45 °C (113 °F)
• Feed water SDI, maximum: 5
• Feed flow, maximum: 4.0 m³/h (18 gpm)
• Concentrate flow, minimum: 0.6 m³/h (3 gpm)
• 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

Mechanical / hydraulic

• Feed spacer thickness: 0.86 mm (34 mil)
• Element Length (A): 1016 mm (40 inch)
• Element Diameter (B): 100 mm (4.0 inch)
• Element OD (C): 19 mm (0.75 inch)
• Element Length (D): 26 mm (1.05 inch)

Handling and Storage

• 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.
• 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 original PDF datasheet. Contractual data must match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet