NF270-4040

Summary

Product identification

• Product Name: FilmTec™ NF270 Nanofiltration Elements for Commercial Systems
• Description: These elements are designed for removing a high percentage of Total Organic Carbon (TOC) and Trihalomethane (THM) precursors, offering medium to high salt passage and medium hardness passage. They are suitable for surface water and groundwater applications requiring good organic removal with partial softening.
• Membrane Type: Polyamide Thin-Film Composite

Performance Specifications

(Based on test conditions: 2,000 ppm MgSO₄, 77°F (25°C), 15% recovery, and specified pressure)

• NF270-2540
  • Part Number: 149986
  • Active Area: 28 ft² (2.6 m²)
  • Applied Pressure: 70 psig (4.8 bar)
  • Permeate Flow Rate: 850 gpd (3.2 m³/d)
  • Stabilized Salt Rejection: >97.0%
  • Individual element flow variation: -20% / +30%
• NF270-4040
  • Part Number: 149987
  • Active Area: 82 ft² (7.6 m²)
  • Applied Pressure: 70 psig (4.8 bar)
  • Permeate Flow Rate: 2,500 gpd (9.5 m³/d)
  • Stabilized Salt Rejection: >97.0%
  • Individual element flow variation: -15% / +50%

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 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 elements: 13 psig (0.9 bar)
  • fiberglassed elements: 15 psig (1.0 bar)
  • Maximum pressure drop across an entire pressure vessel (housing): 30 psi (2.1 bar)
• pH Range:
  • Continuous Operation: 2 - 11
  • Short-Term Cleaning (30 min.): 1 - 12
• Maximum Feed Silt Density Index (SDI): 5
• Free Chlorine Tolerance: < 0.1 ppm (Removal of residual free chlorine by pretreatment prior to membrane exposure is recommended, as oxidation damage is not covered under warranty.)

Mechanical / hydraulic

Dimensions

• NF270-2540
  • A: 40.0 in (1,016 mm)
  • B: 1.19 in (30 mm)
  • C: 0.75 in (19 mm)
  • D: 2.4 in (61 mm)
  • Outer wrap: Tape
• NF270-4040
  • A: 40.0 in (1,016 mm)
  • B: 1.05 in (27 mm)
  • C: 0.75 in (19 mm)
  • D: 3.9 in (99 mm)
  • Outer wrap: Fiberglass

Operational Guidelines

• Avoid abrupt pressure or cross-flow variations.
• During start-up, feed pressure should be increased gradually over a 30-60 second timeframe.
• During start-up, cross-flow velocity at the set operating point should be achieved gradually over 15-20 seconds.
• Keep elements moist at all times after initial wetting.
• Avoid static permeate-side backpressure at all times.
• Permeate obtained from the first hour of operation should be discarded.
• To prevent biological growth during prolonged system shutdowns, it is recommended that membrane elements be immersed in a preservative solution.

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions. Contractual data for specific projects must match the official OEM PDF revision.

Official datasheet (PDF)

PDF datasheet