Eco 440i

Summary

Product Identification

DuPont FILMTEC™ ECO elements are designed for industrial water needs, offering high rejection and flow performance, enabling lower energy usage and reduced regeneration costs in downstream polishing units. They provide robust performance with an industry-leading 99.7% rejection at 150 psi.

• ECO-400i
  • Part number: 11026673
  • Active area: 400 ft² (37 m²)
  • Feed spacer thickness: 34-LDP mil
  • Permeate flow rate: 11,500 gpd (44 m³/d)
  • Typical Stabilized salt (NaCl) rejection: 99.7%
  • Minimum salt (NaCl) rejection: 99.5%
• ECO-440i
  • Part number: 11026679
  • Active area: 440 ft² (41.2 m²)
  • Feed spacer thickness: 28-LDP mil
  • Permeate flow rate: 12,650 gpd (48 m³/d)
  • Typical Stabilized salt (NaCl) rejection: 99.7%
  • Minimum salt (NaCl) rejection: 99.5%

Permeate flow and salt (NaCl) rejection are based on the following standard test conditions: 2,000 ppm NaCl, 150 psi (10.3 bar), 77°F (25°C), pH 8 and 15% recovery. Flow rates for individual elements may vary by no more than +/- 15%. Active area is guaranteed +/-3%.

Mechanical / Hydraulic

Dimensions

• Common dimensions for ECO-400i and ECO-440i:
  • A: 40.0 inches (1,016 mm)
  • B: 40.5 inches (1,029 mm)
  • C: 7.9 inches (201 mm)
  • D: 1.125 ID (29 mm)
• Element is designed to fit a nominal 8-inch (203 mm) I.D. pressure vessel.
• Individual elements with iLEC endcaps measure 40.5 inches (1,029 mm) in length (B). The net length (A) of the elements when connected is 40.0 inches (1,016 mm).

Operating Limits

• Membrane Type: Polyamide Thin-Film Composite
• 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 Pressure Drop: 15 psig (1.0 bar) per element or 50 psi (3.4 bar) per multi-element pressure vessel (whichever value is more limiting).
• pH Range, Continuous Operation: 2 - 11
• pH Range, Short-Term Cleaning (30 min.): 1 - 13
• Maximum Feed Silt Density Index: SDI 5
• Free Chlorine Tolerance: <0.1 ppm
  • Under certain conditions, the presence of free chlorine and other oxidizing agents will cause premature membrane failure. Removal of residual free chlorine by pretreatment prior to membrane exposure is recommended.

General Operating Guidelines

• Proper start-up of reverse osmosis systems is essential. Refer to application information literature entitled "Start-Up Sequence" (Form No. 609-02077).
• Avoid any abrupt pressure or cross-flow variations during start-up, shutdown, cleaning, or other sequences.
• During start-up, a gradual change from a standstill to operating state is recommended:
  • Feed pressure should be increased gradually over a 30-60 second time frame.
  • Cross-flow velocity at set operating point should be achieved gradually over 15-20 seconds.
  • Permeate obtained from the first hour of operation should be discarded.
• Keep elements moist at all times after initial wetting.
• To control biological growth during prolonged system shutdowns, it is recommended that membrane elements be immersed in a preservative solution.
• Avoid static permeate-side backpressure at all times.
• The customer is fully responsible for the effects of incompatible chemicals and lubricants on elements.

Disclaimer: This summary is based on text extracted from a PDF datasheet. The extraction process may miss figures, footnotes, or the latest revisions. For contractual purposes, data must match the official OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet