LE-400

Summary

Product identification

The FilmTec™ XLE-440 Element is a spiral-wound element with a polyamide thin-film composite membrane. It is described as the lowest pressure FilmTec™ RO Element, ideal for applications requiring high-quality permeate at low operating costs with controlled pre-treatment.

Key features include:

• Lower energy costs and increased productivity, particularly in cold water applications.
• Minimizes equipment CAPEX through savings in elements and pumping, thanks to its 440 ft² active area.
• Offers effective cleaning performance, robustness, and durability due to a wide cleaning pH range (1-13).

Typical Properties

• Permeate flow and salt (NaCl) rejection are based on standard test conditions: 2,000 ppm NaCl, 125 psi (8.6 bar), 77°F (25°C), pH 8, 15% recovery.
• Flow rates for individual elements may vary but will be no more than +15%.
• Stabilized salt rejection is generally achieved within 24-48 hours of continuous use, depending on feedwater characteristics and operating conditions.
• Active area is guaranteed ±5%.

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: 600 psig (41 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

Feed water

• The membrane has a free chlorine tolerance of < 0.1 ppm. Pretreatment is recommended to remove residual free chlorine and other oxidizing agents to prevent premature membrane failure, as oxidation damage is not covered under warranty.
• Maximum Feed Silt Density Index (SDI): SDI 5.

Product water

• Typical stabilized salt rejection is 99.0%, with a minimum salt rejection of 97.0%, under standard test conditions.
• The use of this product does not inherently guarantee the removal of cysts and pathogens from water; effective reduction depends on the complete system design, operation, and maintenance.
• Permeate obtained from the first hour of operation should be discarded.

Mechanical / hydraulic

The element fits a nominal 8-inch (203-mm) I.D. pressure vessel.

Dimensions (inches / mm):

• A: 40.0 in (1,016 mm)
• B: 1.50 ID in (38 ID mm)
• C: 7.9 in (201 mm)

Additional Important Information

Customers should review usage guidelines, start-up sequences, and other resources. DuPont encourages customers to evaluate their processes and applications for human health and environmental quality, ensuring products are used as intended.

Disclaimer

All information herein is for informational purposes only and may differ from actual conditions. The customer is responsible for determining product suitability and ensuring compliance with applicable laws. Sales specifications and product availability may vary by region. Physical properties may vary depending on conditions, and operating conditions are intended to lengthen product lifespan/improve performance but are not a guarantee of specific results. DuPont assumes no obligation or liability for this information. No warranties are given; all implied warranties of merchantability or fitness for a particular purpose are expressly excluded. No freedom from infringement of any patent or trademark owned by DuPont or others is to be inferred.

Official datasheet (PDF)

PDF datasheet