Datasheet summary
DL series
Engineering summary from PDF text extraction for DL series. Verify every value with the OEM datasheet.
Summary
Product identification
The DL Series consists of industrial high-flow nanofiltration elements featuring D-Series Thin-Film Membranes (TFM*). These membranes are characterized by 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 is dependent upon feed concentration and composition. Since monovalent ions pass through the membrane, they do not contribute to osmotic pressure, allowing systems to operate at lower feed pressures than reverse osmosis (RO) systems.
Typical applications include dye removal/concentration, sodium chloride diafiltration, and metals recovery.
Element Specifications
Testing conditions for average permeate flow and MgSO₄ rejection are: 2,000 ppm MgSO₄ solution at 110 psi (760 kPa) operating pressure, 77°F (25°C), and 15% recovery. Average salt rejection is measured after 24 hours of operation. Individual flow rates may vary ±25%.
| Model | Average permeate flow GPD (m³/day) | Average MgSO₄ rejection | Spacer mil (mm) | Active area ft² (m²) | Outer wrap | Part number |
|---|---|---|---|---|---|---|
| DL2540C30 | 610 (2.3) | 96 % | 30 (0.76) | 25 (2.3) | Cage | 3028456 |
| DL2540C50 | 430 (1.6) | 96 % | 50 (1.27) | 18 (1.7) | Cage | 1207015 |
| DL2540F30 | 650 (2.5) | 96 % | 30 (0.76) | 28 (2.6) | Fiberglass | 1207018 |
| DL2540F50 | 450 (1.7) | 96 % | 50 (1.27) | 22 (2.0) | Fiberglass | 1207019 |
| DL4040C30 | 2,400 (9.0) | 96 % | 30 (0.76) | 89 (8.2) | Cage | 1207030 |
| DL4040C50 | 1,800 (6.8) | 96 % | 50 (1.27) | 67 (6.2) | Cage | 1207028 |
| DL4040F30 | 2,400 (9.1) | 96 % | 30 (0.76) | 85 (7.9) | Fiberglass | 3050068 |
| DL4040F50 | 1,800 (6.8) | 96 % | 50 (1.27) | 66 (6.1) | Fiberglass | 3050067 |
| DL8040C30 | 10,200 (38.6) | 96 % | 30 (0.76) | 374 (34.7) | Cage | 1207040 |
| DL8040C50 | 8,200 (31.0) | 96 % | 50 (1.27) | 300 (27.9) | Cage | 1207041 |
| DL8040F30 | 10,200 (38.6) | 96 % | 30 (0.76) | 364 (33.8) | Fiberglass | 1207048 |
| DL8040F50 | 8,200 (31.0) | 96 % | 50 (1.27) | 284 (26.4) | Fiberglass | 1207049 |
Mechanical / hydraulic
DL4040C** elements do not feature a brine seal.
| Model | Dimensions, inches (cm) A | B (1) | C | Boxed Weight lbs. (kg) |
|---|---|---|---|---|
| DL2540F** | 40.0 (101.6) | 0.75 (1.90) OD | 2.4 (6.1) | 4 (1.8) |
| DL2540C** | 40.0 (101.6) | 0.75 (1.90) OD | 2.4 (6.1) | 4 (1.8) |
| DL4040C** | 40.0 (101.6) (2) | 0.625 (1.59) | 3.9 (9.9) | 9 (4.1) |
| DL4040F** | 40.0 (101.6) | 0.75 (1.90) OD | 3.9 (9.9) | 9 (4.1) |
| DL8040C** | 40.0 (101.6) | 1.125 (2.86) | 7.9 (20.1) | 29 (13.2) |
| DL8040F** | 40.0 (101.6) | 1.125 (2.86) | 7.9 (20.1) | 29 (13.2) |
(1) Internal diameter unless specified OD (outside diameter). (2) Includes the interconnector.
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: 3-9
- Clean-In-Place (CIP): 2-11
- Maximum Pressure Drop:
- Over an element: 15 psi (103 kPa)
- Per housing: 60 psi (414 kPa)
- Chlorine Tolerance: 500 ppm hours, dechlorination recommended.
Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions. Contractual data must match the OEM PDF revision used on the 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.