NF345HP-370

Summary

Product identification

FilmTec™ NF90 Nanofiltration Elements for Commercial Systems are Polyamide Thin-Film Composite membranes. They are designed to provide high productivity while removing a high percentage of salts, nitrate, iron, and organic compounds such as pesticides, herbicides, and THM precursors. The low net driving pressure of the NF90 membrane allows removal of these compounds at low operating pressures.

• Part Numbers:
  • NF90-2540: 149982
  • NF90-4040: 149983

Operating limits

• Membrane Type: Polyamide Thin-Film Composite
• Maximum Operating Temperature: 113°F (45°C)
• Maximum Operating Pressure: 600 psi (41 bar)
• Maximum Feed Flow Rate:
  • 4040 elements: 16 gpm (3.6 m³/hr)
  • 2540 elements: 6 gpm (1.4 m³/hr)
• Maximum Pressure Drop:
  • tape wrapped: 13 psig (0.9 bar)
  • fiberglassed: 15 psig (1.0 bar)
  • Across an entire pressure vessel (housing): 30 psi (2.1 bar)
• pH Range:
  • Continuous Operation: 2 – 11 (Maximum temperature for continuous operation above pH 10 is 95°F (35°C))
  • Short-Term Cleaning (30 min.): 1 – 12
• Maximum Feed Silt Density Index (SDI): 5
• Free Chlorine Tolerance: <0.1 ppm
• Avoid static permeate-side backpressure at all times.

Feed water

• Test Conditions (for permeate flow and salt rejection): 2,000 ppm MgSO₄, 77°F (25°C) and 15% recovery at the specified pressure.

Product water

• Permeate Flow Rate (under test conditions):
  • NF90-2540: 680 gpd (2.6 m³/d)
  • NF90-4040: 2,000 gpd (7.6 m³/d)
• Minimum Salt Rejection (under test conditions):
  • NF90-2540: 97.0%
  • NF90-4040: 98.7%
• Permeate Flow Variations for individual elements:
  • NF90-2540 Elements: -20% / +30%
  • NF90-4040 Elements: -15% / +50%
• Permeate obtained from the first hour of operation should be discarded.
• The use of this product in and of itself does not necessarily guarantee the removal of cysts and pathogens from water. Effective cyst and pathogen reduction is dependent on the complete system design and on the operation and maintenance of the system.

Mechanical / hydraulic

• Dimensions – Inches (mm):
  • NF90-2540:
    • A: 40.0 (1,016)
    • B: 1.19 (30)
    • C: 0.75 (19)
    • D: 2.4 (61)
  • NF90-4040:
    • A: 40.0 (1,016)
    • B: 1.05 (27)
    • C: 0.75 (19)
    • D: 3.9 (99)
• Outer wrap:
  • NF90-2540 has a tape outer wrap.
  • NF90-4040 has a fiberglass outer wrap.

Start-up and Operation Guidelines

• Avoid any abrupt pressure or cross-flow variations on the spiral elements during start-up, shutdown, cleaning, or other sequences to prevent possible membrane damage.
• 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 the set operating point should be achieved gradually over 15-20 seconds.

General Notes

• Keep elements moist at all times after initial wetting.
• If operating limits and guidelines are not strictly followed, the limited warranty may be null and void.
• To prevent biological growth during prolonged system shutdowns, it is recommended that membrane elements be immersed in a preservative solution.
• The customer is fully responsible for the effects of incompatible chemicals and lubricants on elements.
• Oxidation damage is not covered under warranty. It is recommended to remove residual free chlorine by pretreatment prior to membrane exposure.

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 datasheet. For contractual data and complete information, the official OEM PDF revision used on the project should be consulted.

Official datasheet (PDF)

PDF datasheet