Datasheet summary
NDX TFC 500-700Da
Engineering summary from PDF text extraction for NDX TFC 500-700Da. Verify every value with the OEM datasheet.
Summary
Product identification
The NDX (500-700Da) is a sanitary nanofiltration spiral-wound element.
- Polymer: Proprietary PA TFC
- Approx. Molecular Weight Cutoff: 500-700Da
Operating limits
Recommended Operating Parameters
- Maximum Operating Pressure:
- 600psi (4,137kPa) if T <95°F (35°C)
- 435psi (3,000kPa) if T >95°F (35°C)
- Maximum Temperature: 50°C (122°F)
- pH Range @ Max Temperature: 4-9
- pH Range @ Ambient Temperature: 4-10
Cleaning Parameters
- Maximum Temperature (Short term <30min): 40°C (104°F)
- pH Range @ Max Temperature: 3-10
- pH Range @ Ambient Temperature: 3-10.5
Pressure Drop
- Maximum per Element: 15psi (103kPa)
- Maximum per Housing: 60psi (414kPa)
Feed water
- Chlorine Tolerance: 500ppm hours, dechlorination recommended
Product water
Membrane Specifications
- Typical Operating Flux: 35-45 GFD
- Avg Lactose Rejection: 90.0%
- Avg MgSO₄ Rejection: 95.0%
- Avg NaCl Rejection: 40.0%
- Test Conditions for Rejection: 2% Lactose solution, 2,000ppm MgSO₄ solution, or 2,000ppm NaCl solution at 110psi (760kPa) operating pressure, 77°F (25°C).
Mechanical / hydraulic
Element Dimensions & Weight
| Element Model Number | Diameter (B) in (cm) | Length (A) in (cm) | PWT ID/OD in (cm) | Tube Extension (C) in (cm) | Dry Weight lb (kg) |
|---|---|---|---|---|---|
| 1.8” | |||||
| 1812F | 1.8 (4.6) | 12.0 (30.5) | 0.63 (1.6) | - | 1.0 (0.5) |
| 2.5” | |||||
| 2540F | 2.4 (6.1) | 40.0 (101.6) | 0.63 (1.6) | - | 4.0 (1.8) |
| 2540M | 2.4 (6.1) | 40.0 (101.6) | - | 1 (2.54) (Both Ends) | 4.0 (1.8) |
| 3.8” | |||||
| 3838 | 3.8 (9.7) | 38.0 (96.5) | 0.83 (2.1) | - | 9.0 (4.1) |
| 3838.75 | 3.8 (9.7) | 38.8 (98.4) | 0.81 (2.1) | - | 9.0 (4.1) |
| 8” | |||||
| 8038 | 7.9 (20.1) | 38.0 (96.5) | 1.13 (2.9) | - | 29.0 (13.2) |
| 8040 | 7.9 (20.1) | 40.0 (101.6) | 1.13 (2.9) | - | 29.0 (13.2) |
NF Membrane Area
Membrane area varies by element model and feed spacer thickness (24, 31, 46, 65, 80 mils). See the official PDF for exact tabulated values.
Recommended Element Cross Flow Rate
Recommended cross flow rates (in m³/hr and gpm) are provided for different element sizes and feed spacer thicknesses (24, 31, 46, 65, 80 mils). The recommended cross flow rate is subject to differential pressure limitations and specific applications. See the official PDF for exact tabulated values.
Common Applications
- Demineralization & concentration of lactose
- Desalination of dyes and optical brighteners
- Seawater sulfate removal
NF Series Benefits
- Competitive flux compared to current industry standard NF membranes.
- Excellent MgSO₄ and lactose rejection.
- Can operate at lower pressures than Reverse Osmosis membranes while achieving excellent rejection of divalent and multivalent ions.
- NF membranes significantly reduce levels of hardness, nitrates, sulfates, tannins, turbidity, color, TDS, and moderate levels of salt from feed water streams.
Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions. For contractual data, always refer to the specific OEM PDF revision used on your 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.