LewaBrane RO B400 LE

Summary

Product Identification

The Lewabrane® RO B400 LE elements are spiral-wound, composite polyamide membrane elements designed for higher permeability than standard pressure RO membranes. They are characterized by a lower operating feed pressure, resulting in lower energy consumption, hence the "LE" (Low Energy) designation. These RO membranes are suitable for industrial and potable water treatment applications, including brackish and low salinity waters.

General Information / Performance

• 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: 34.8 m³/d (9200 gpd)
• Permeate flow rate, minimum: 27.8 m³/d (7300 gpd)

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
• Recovery rate: 15 %

Mechanical / Hydraulic

Element Dimensions:

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

Pressure Drops:

• Pressure drop per element, max.: 1.0 bar (15 psi)
• Pressure drop per vessel, max.: 3.5 bar (50 psi)

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
• Chlorine concentration, max.: 0.1 ppm

Additional Information

• Handle RO Elements with care; avoid dropping.
• 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. Use a compatible preservative if storing for longer than 7 days.
• During initial start-up, discharge the first permeate to drain for 30 minutes.
• Permeate back pressure must 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.
• Refer to OEM technical information for additional details.

Disclaimer

This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions present in the official PDF datasheet. Contractual data must match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet