XUS120304

Summary

Product identification

DOW™ Specialty Membrane XUS120308 and XUS120304 are High Temperature Reverse Osmosis Elements featuring:

• Continuous operating temperature capability up to 80°C due to special element and membrane design.
• Robust DOW FILMTEC™ SW30 based reverse osmosis (RO) membrane sheet.
• DOW HYPERSHELL™ Reverse Osmosis technology, a machined polypropylene rigid outer shell, offering:
  • Minimized channeling and control of premature element failures.
  • Improved hydrodynamics compared to mesh wrapped elements, potentially leading to energy savings and improved processing/Clean In Place (CIP) efficiency.
  • Improved safety and faster loading/unloading due to the rigid case which does not expand.
  • Easy and permanent identification via laser-etched model names and serial numbers.
• A 48 mil parallel feed spacer which lessens the impact of fouling, reduces pressure drop, and enhances cleaning effectiveness.

These elements can reduce the size of cooling and heating systems, saving on both OPEX and CAPEX. Typical applications include:

• Hot evaporator condensate reuse for process and rinsing.
• Concentration of thin juice sugars or components in chemical processing.
• Production of water for the pharmaceutical industry.

Mechanical / hydraulic

DOW HYPERSHELL™ Elements require approximately 30% less flow than mesh wrap for an equivalent pressure drop (at 4 psi delta P).

Product Specifications

• DOW XUS120308
  • Active Area: 235 ft² (21.8 m²)
  • Feed Spacer Thickness: 48 mil
  • Minimum ATD OD: 7.9 inch
  • ATD included: No
• DOW XUS120304
  • Active Area: 42 ft² (3.9 m²)
  • Feed Spacer Thickness: 48 mil
  • Minimum ATD OD: 3.9 inch
  • ATD included: Yes

Element Dimensions

• XUS120308
  • A: 38 in (965 mm)
  • B: 1.125 ID (29 ID mm)
  • C: 7.9 in (201 mm)
• XUS120304
  • A: 40.0 in (1016 mm)
  • B: 1.03 in (26 mm)
  • C: 0.75 OD (19 OD mm)
  • D: 3.9 in (99 mm)

DOW HYPERSHELL™ 4040 elements are designed to fit standard 4040 pressure vessels.

Operating limits

• Maximum Operating Temperature: 80°C (176°F)
• Maximum Operating Pressure at 80°C: 30 bar (435 psi)
• Maximum Single Element Pressure Drop < 50°C: 0.9 bar (13.1 psi)
• Maximum Single Element Pressure Drop < 80°C: 0.3 bar (4.4 psi)
• Maximum Vessel Pressure Drop < 50°C: 4.1 bar (60 psi)
• Maximum Vessel Pressure Drop < 80°C: 1.2 bar (17 psi)
• pH Range, Continuous Operation (<45°C): pH2 – pH11
• pH Range, Continuous Operation (< 80°C): pH3 – pH8
• Hydrogen Peroxide Limit: 20 ppm
• Free Chlorine Tolerance: Below Detectable Limits

Feed water

• Maximum Feed Silt Density Index (SDI₁₅): SDI 5

Clean in Place (CIP) Parameters

• Maximum CIP Pressure: 15 to 75 psi (1 to 5 bar)
• pH Range, Cleaning (45°C to 50°C): pH1.8 – pH11.0
• pH Range, Cleaning (< 45°C): pH1 – pH13
• Hydrogen Peroxide Limit, Short-Term Cleaning: 1,000 ppm

General Information

Start-Up New elements are normally cleaned prior to initial use. An alkaline wash with a wetting agent is recommended prior to initial use if formulated agents are not available. Avoid abrupt pressure or cross-flow variations on the spiral elements during start-up, shutdown, cleaning, or other sequences to prevent possible membrane damage. A gradual change from a standstill to operating state is recommended:

• Feed pressure should be increased gradually over a 30-60 second timeframe.
• Before initiating cross-flow at high permeate flux conditions, the set operating pressure should be maintained for 5-10 minutes.
• Cross-flow velocity at the 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.

Storage

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

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

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Disclaimer: This summary is based on the provided text extract and may not include all figures, footnotes, or the latest revisions from the original PDF. For contractual data, always refer to the specific OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet