S085 HR 4040

Summary

Product identification

Lewabrane® RO S085 HR 4040 elements are spiral-wound, composite polyamide membrane elements designed for the desalination of seawater. The S085 HR membrane features an extremely durable, highly cross-linked polymeric separating layer suitable for high salinity, high pressure applications. It is recommended for single pass applications where stable salt rejection performance is an important consideration.

• Edition: 2014-05-23
• Feed spacer thickness: 0.8 mm (31 mil)
• Membrane area: 7.9 m² (85 ft²)

Product water

• Salt rejection, average: 99.8 %
• Salt rejection, minimum: 99.5 %
• Boron rejection, typical: 93.0 %
• Permeate flow rate, average: 5.2 m³/d (1380 gpd)
• Permeate flow rate, minimum: 4.2 m³/d (1100 gpd)

Performance Test Conditions: Elements are tested under the following conditions:

• Applied pressure: 55.2 bar (800 psi)
• NaCl concentration: 32,000 mg/L (or when tested on a mixed solution of 32,000 mg/L NaCl and 5 mg/L Boron)
• Operating temperature: 25 °C (77 °F)
• pH: 8
• Recovery rate: 8 %

Operating limits

• Operating pressure, maximum: 83 bar (1200 psi)
• Operating temperature, maximum: 45 °C (113 °F)
• 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)

Feed water

• SDI, maximum: 5
• Feed flow, maximum: 4.0 m³/h (18 gpm)
• Concentrate flow, minimum: 0.6 m³/h (3 gpm)
• Chlorine concentration, maximum: 0.1 ppm

Mechanical / hydraulic

• Element Dimensions:
  • A (Length): 1016 mm (40 inch)
  • B (Diameter): 100 mm (4.0 inch)
  • C (OD): 19 mm (0.75 inch)
  • D (Length): 26 mm (1.05 inch)

General Care and Maintenance

• 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 durations longer than 7 days.
• During the 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 which are compatible with the membrane.

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Disclaimer: This summary is based solely on the provided text extract. It may not include all figures, footnotes, or the latest revisions found in the official PDF datasheet. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet