LewaBrane RO B400 FR

Summary

Product identification

The Lewabrane® RO B400 FR elements are spiral-wound, composite polyamide membrane elements designed for industrial water treatment applications. These elements are engineered to provide increased turbulence in the feedwater spacer, combined with a highly crosslinked, low-surface-charge Lewabrane membrane. They are recommended for brackish and low-salinity feedwaters with higher biological and organic fouling tendencies.

General performance data

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
• Recovery rate: 15 %

Performance at test conditions:

• Feed spacer thickness: 0.86 mm (34 mil)
• Membrane area: 37.2 m² (400 ft²)
• Salt rejection, average: 99.5 %
• Salt rejection, minimum: 99.0 %
• Permeate flow rate, average: 39.9 m³/d (10500 gpd)
• Permeate flow rate, minimum: 31.9 m³/d (8400 gpd)

Mechanical / hydraulic

Element Dimensions

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

Operating limits

• Operating pressure, max.: 41 bar (600 psi)
• Operating temperature, max.: 45 °C (113 °F)
• Feed water SDI, max.: 5
• Feed flow, max.: 18.0 m³/h (80 gpm)
• Concentrate flow, min.: 2.7 m³/h (12 gpm)
• 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

Additional information

• Handling: Treat RO Elements with care; do not drop the element.
• Preservation: Each RO Element is wet tested, preserved in a 1% weight sodium bisulfite solution, and vacuum packed in oxygen barrier bags.
• Storage: Avoid freezing and direct sunlight. The temperature should be below 35 °C (95 °F).
• Installation & Operation:
  • 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 compatible with the membrane.

Disclaimer

This summary is based on text extracted from a PDF datasheet (Edition: 2014-02-20). The extraction process may miss figures, footnotes, or later revisions of the document. Contractual data must match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet