Datasheet summary
NF270-2540
Engineering summary from PDF text extraction for NF270-2540. Verify every value with the OEM datasheet.
Summary
Product identification
FilmTec™ NF270 Nanofiltration Elements are designed for commercial systems. They are ideal for removing a high percentage of Total Organic Carbon (TOC) and Trihalomethane (THM) precursors, offering medium to high salt passage and medium hardness passage. This makes them suitable for surface water and groundwater applications requiring good organic removal and partial softening.
- Membrane Type: Polyamide Thin-Film Composite
| Product | Part Number | Active Area ft² (m²) | Applied Pressure psig (bar) | Permeate Flow Rate gpd (m³/d) | Stabilized Salt Rejection (%) |
|---|---|---|---|---|---|
| NF270-2540 | 149986 | 28 (2.6) | 70 (4.8) | 850 (3.2) | >97.0 |
| NF270-4040 | 149987 | 82 (7.6) | 70 (4.8) | 2,500 (9.5) | >97.0 |
- Permeate flow and salt rejection are based on test conditions of 2,000 ppm MgSO₄, 77°F (25°C), and 15% recovery at the specified pressure.
- Permeate flows for individual NF270-2540 elements may vary by -20% / +30%.
- Permeate flows for individual NF270-4040 elements may vary by -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: 13 psig (0.9 bar)
- fiberglassed: 15 psig (1.0 bar)
- pH Range:
- Continuous Operation: 2 - 11
- Short-Term Cleaning (30 min.): 1 - 12
- Maximum Feed Silt Density Index (SDI): SDI 5
- Free Chlorine Tolerance: < 0.1 ppm (pretreatment recommended)
Mechanical / hydraulic
Element dimensions (inches (mm)):
| Product | A | B | C | D |
|---|---|---|---|---|
| NF270-2540 | 40.0 (1,016) | 1.19 (30) | 0.75 (19) | 2.4 (61) |
| NF270-4040 | 40.0 (1,016) | 1.05 (27) | 0.75 (19) | 3.9 (99) |
- NF270-2540 elements have a tape outer wrap.
- NF270-4040 elements have a fiberglass outer wrap.
- Maximum pressure drop across an entire pressure vessel (housing) is 30 psi (2.1 bar).
General Guidelines
- Keep elements moist at all times after initial wetting.
- To prevent biological growth during prolonged system shutdowns, membrane elements should be immersed in a preservative solution.
- 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. Gradual changes are recommended during start-up:
- 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.
- Discard permeate obtained from the first hour of operation.
- Avoid static permeate-side backpressure at all times.
- The use of this product does not necessarily guarantee the removal of cysts and pathogens from water; effective reduction depends on complete system design, operation, and maintenance.
Disclaimer: This summary is based on the provided text extract and may not include all figures, footnotes, or the latest revisions from the complete OEM PDF datasheet. Contractual data for any project must match the specific OEM PDF revision used on that project.
Official datasheet (PDF)
Curated from selected public technical reference material for discovery and preliminary comparison. This summary is not a substitute for a current certified manufacturer datasheet. Verify revisions and design limits before use.