LewaBrane RO B370 HF

Summary

Product identification

• Lewabrane® RO B370 HF 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.
• Edition: 2014-02-20
• Previous Edition: 2014-02-17

Product Water Performance

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 data:

• Salt rejection, average: 99.5 %
• Salt rejection, minimum: 99.0 %
• Permeate flow rate, average: 37.2 m³/d (9800 gpd)
• Permeate flow rate, minimum: 29.8 m³/d (7900 gpd)

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
• 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)

Mechanical / Hydraulic

• Membrane area: 34.4 m² (370 ft²)
• Feed spacer thickness: 0.8 mm (31 mil)
• Element Dimensions:
  • Length (A): 1016 mm (40 inch)
  • Diameter (B): 201 mm (7.9 inch)
  • ID (C): 29 mm (1.125 inch)
• Pressure drop per element, max.: 1.0 bar (15 psi)
• Pressure drop per vessel, max.: 3.5 bar (50 psi)

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 the provided text extract. It may not include all figures, footnotes, or the latest revisions from the official OEM PDF datasheet. For contractual data, always refer to the specific OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet