Datasheet summary
DK 400 series
Engineering summary from PDF text extraction for DK 400 series. Verify every value with the OEM datasheet.
Summary
Product identification
The DK 400 Series consists of industrial high rejection nanofiltration elements. These D-Series thin-film membrane (TFM) elements have an approximate molecular weight cut-off of 150-300 Dalton for uncharged organic molecules. They preferentially reject divalent and multivalent anions, while monovalent ion rejection depends on feed concentration and composition, allowing operation at lower feed pressures than typical reverse osmosis systems.
Applications include dye brine purification, demineralization/concentration of organic solutions, and metals recovery.
- Membrane Type: D-Series, Thin-film membrane (TFM)
| Model | Part Number |
|---|---|
| DK-400 | 3154589 |
| DK-440 | 3154650 |
Operating limits
- Typical Operating Flux: 5 - 20 GFD (8 – 34 LMH)
- Maximum Operating Pressure:
- 600 psi (4,137 kPa) if T < 95 °F (35 °C)
- 435 psi (3,000 kPa) if T > 95 °F (35 °C)
- Maximum Temperature:
- Continuous operation: 122 °F (50 °C)
- Clean-In-Place (CIP): 122 °F (50 °C)
- pH Range:
- Continuous operation: 3.0 – 9.0
- Clean-In-Place (CIP): 2.0 - 11.0
- Maximum Pressure Drop:
- Over an element: 15 psi (103 kPa)
- Per housing: 60 psi (414 kPa)
- Chlorine Tolerance: 500 ppm hours (dechlorination recommended)
Feed water
- NTU: < 1
- SDI₁₅: < 5
Product water
The following performance specifications are based on testing conditions of 2,000 ppm MgSO₄ solution at 110 psi (760 kPa) operating pressure, 77 °F (25 °C), and 15% recovery. Average salt rejection is after 24 hours of operation, and individual flow rates may vary ±25%.
| Model | Average Permeate Flow gpd (m³/day) | Minimum MgSO₄ Rejection |
|---|---|---|
| DK-400 | 9,500 (36.0) | 98% |
| DK-440 | 10,500 (39.7) | 98% |
Mechanical / hydraulic
| Model | Spacer mil (mm) | Active Area ft² (m²) | Outer Wrap | Boxed Weight lbs (kg) |
|---|---|---|---|---|
| DK-400 | 34 (0.86) | 400 (37.2) | Fiberglass | 35 (15.9) |
| DK-440 | 28 (0.71) | 440 (40.9) | Fiberglass | 35 (15.9) |
Dimensions (referencing Figure 1, not provided):
| Model | Dimension A inches (cm) | Dimension B inches (cm) | Dimension C inches (cm) |
|---|---|---|---|
| DK-400 | 40.0 (101.6) | 1.125 (2.86) | 7.9 (20.1) |
| DK-440 | 40.0 (101.6) | 1.125 (2.86) | 7.9 (20.1) |
Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions. For contractual data, please refer to the official OEM PDF document 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.