XUS180804

Summary

Product identification

• Product: DOW™ Specialty Membrane XUS180804 and XUS180802 Reverse Osmosis Elements
• Description: Ultra-High Pressure, High-Rejection, Reverse Osmosis Elements for Industrial Water Purification.
• Key Features:
  • Up to 120 bar (1,740 psi) ultra-high feed pressure capability due to distinct element and membrane design.
  • Increases the overall efficiency of Zero-Liquid-Discharge (ZLD) by achieving very high solute concentrations.
  • Excellent for recovery of salts in process streams.
  • Robust DOW FILMTEC™ reverse osmosis (RO) membrane sheet.
  • 34 mil feed spacer to lessen the impact of fouling on the pressure drop across a vessel and to enhance cleaning effectiveness.

Mechanical / hydraulic

• Specifications:
  • DOW XUS180804:
    • Active Area: 60 ft² (5.6 m²)
    • Feed Spacer Thickness: 34 mil
    • Minimum ATD OD: 3.9 in.
    • ATD included: Yes
  • DOW XUS180802:
    • Active Area: 18 ft² (1.7 m²)
    • Feed Spacer Thickness: 34 mil
    • Minimum ATD OD: 2.4 in.
    • ATD included: Yes
• Element Dimensions:
  • DOW XUS180804:
    • A: 40.0 in. (1,016 mm)
    • B: 1.03 in. (26 mm)
    • C: 0.75 OD (19 OD)
    • D: 3.9 in. (99 mm)
  • DOW XUS180802:
    • A: 40.0 in. (1,016 mm)
    • B: 1.03 in. (26 mm)
    • C: 0.75 OD (19 OD)
    • D: 2.5 in. (63.5 mm)

Operating limits

• Maximum Operating Temperature: 113°F (45°C)
  • Maximum temperature for continuous operation above pH 10 is 95°F (35°C).
• Maximum Operating Pressure at 30°C: 1,740 psig (120 bar)
• Maximum Element Pressure Drop: 15 psig (1.0 bar)
• pH Range, Continuous Operation: 2 – 11
• pH Range, Short-Term Cleaning (30 min.): 1 – 13
• Maximum Feed Silt Density Index (SDI): SDI 5
• Free Chlorine Tolerance: < 0.1 ppm
• Maximum Allowed Feed Pressure vs. Temperature:
  • 5-30°C: 120 bar (1,740 psi)
  • 35°C: 103 bar (1,494 psi)
  • 40°C: 90 bar (1,305 psi)
  • 45°C: 83 bar (1,200 psi)

Clean in Place (CIP) Parameters

• Maximum CIP Pressure: 15 to 75 psi (1 to 5 bar)
• pH Range, Cleaning (< 45°C): pH1 – pH13
• Hydrogen Peroxide Limit, Short-Term Cleaning: 1,000 ppm

Start-Up Information

• Normally, new elements are cleaned prior to initial use.
• Avoid abrupt pressure or cross-flow variations on the spiral elements during start-up, shutdown, cleaning or other sequences to prevent possible membrane damage.
• During startup, a gradual change from a standstill to operating state is recommended:
  • Feed pressure should be increased gradually over a 30-60 second time frame.
  • Before initiating cross-flow at high permeate flux conditions, the set operating pressure should be maintained for 5-10 minutes.
  • Cross-flow velocity at set operating point should be achieved gradually over 15-20 seconds.
• Avoid permeate-side backpressure at all times.
• Any concentrate or permeate obtained from the first hour of operation should be discarded.

General Information

• Keep elements moist at all times after initial wetting.
• To control the spread of biological growth during system shutdowns, it is recommended that elements be immersed in a preservative solution.

Regulatory Note

These membranes may be subject to drinking water application restrictions in some countries; please check the application status before use and sale.

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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. Contractual data must always match the OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet