LewaBrane RO B440 HR

Summary

Product identification

The Lewabrane® RO B440 HR elements are spiral wound, composite polyamide membrane elements designed for industrial water treatment applications, such as the treatment of brackish and low salinity waters for primary demineralization in boiler water and process water applications.

Each RO Element is wet tested, preserved in a 1% weight sodium bisulfite solution, and vacuum packed in oxygen barrier bags.

Product water

Performance 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 %.

• Salt rejection, av.: 99.7 %
• Salt rejection, min.: 99.3 %
• Permeate flow rate, av.: 41.7 m³/d (11000 gpd)
• Permeate flow rate, min.: 33.4 m³/d (8800 gpd)

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

Mechanical / hydraulic

• Feed spacer thickness: 0.7 mm (28 mil)
• Membrane area: 40.9 m² (440 ft²)

Element Dimensions:

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

General Information & Handling

• Treat RO Elements with care; do not drop the element.
• 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 the provided text extraction, which may omit figures, footnotes, or the latest revisions of the OEM PDF datasheet. Contractual data must match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet