S440 HR

Summary

Product identification

• Product Name: LEWABRANE® RO S440 HR
• Type: Spiral-wound, composite polyamide membrane elements.
• Application: Designed for the desalination of seawater; suitable for high salinity, high pressure applications. Recommended for single pass applications where stable salt rejection performance is an important consideration.
• Membrane: Characterized by an extremely durable, highly cross-linked polymeric separating layer.
• Edition: 2016-09-01

Performance Specifications

• Membrane area: 40.9 m² (440 ft²)
• Salt rejection, average: 99.8 %
• Salt rejection, minimum: 99.5 %
• Boron rejection, typical: 93.0 %
• Permeate flow rate, average: 27.3 m³/d (7200 gpd)
• Permeate flow rate, minimum: 21.8 m³/d (5760 gpd)
• Element is 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)
• Feed water SDI, maximum: 5
• pH range during operating: 2 - 11
• pH range during cleaning: 1 - 12
• Chlorine concentration, maximum: 0.1 ppm

Mechanical / Hydraulic

• Feed spacer thickness: 0.7 mm (28 mil)
• Pressure drop per element, maximum: 1.0 bar (15 psi)
• Pressure drop per vessel, maximum: 3.5 bar (50 psi)
• Element Dimensions:
  • Length (A): 1016 mm (40 inch)
  • Diameter (B): 201 mm (7.9 inch)
  • ID (C): 29 mm (1.125 inch)

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.
  • The RO Elements shall be maintained in a clean condition, unfouled by particulate matter or precipitates or biological growth.
  • Consider cleaning, if the pressure drop increases by 20% or water permeability decreases by 10%.
  • Use only chemicals which are compatible with the membrane.

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

Official datasheet (PDF)

PDF datasheet