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| Low pressure spiral RO element |
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| NTR-70SWC |
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| Converts seawater to freshwater with high efficiency. |
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Outline |
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| NTR-750SWC converts seawater to fresh water. It is a reverse osmosis membrane element for seawater desalination, developed by the all-round membrane manufacturer, Nitto Denko, through its most-advanced polymer membrane synthesizing technology. We are responding to ever increasing demands for water through effective conversion of unlimited seawater to potable and process water with its significantly improved rejection. |
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Features |
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Enables stable supply of potable freshwater of approx. 500ppm for long periods from seawater (dissolved salt density of 35,000ppm) through single stage desalination process. |
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Employs anti-telescope structure for the 8 inch element (NTR-70SWC-S8). Since the adjacent elements contact with each other in entire circumference, the elements do not dislocate inside the vessel even for the pressure drop buildup, assuring stable operations. |
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Employing aromatic polyamide synthetic polymer composite membrane, no deterioration occurs due to bacteria or dissolved oxygen. |
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Excellently prevents not only various non-organic ions but also other organic materials such as agricultural chemicals, organohalogen compounds, etc. |
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Structures |
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Applications |
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Seawater desalination. |
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Desalination of high concentration brackish water. |
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Production of potable water |
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For various process water or boiler feed water. |
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Sizes |
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| NTR-70SWC-S4 |
Φ
99.5×1,016L(mm) |
| NTR-70SWC-S8 |
Φ
201×1,016L(mm) |
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Performance |
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Rejection (%) |
Flux |
| NTR-70SWC-S4 |
Average value (%) |
99.6 |
4.0 |
| Min. value (%) |
99.4 |
3.5 |
| NTR-70SWC-S8 |
Average value (m3/d) |
99.6 |
16.0 |
| Min. value (m3/d) |
99.4 |
14.0 |
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[Evaluation conditions] •Evaluation solution: 3.5% NaCl water solution •Concentrate flow rate::S4=20L/min S8=80L/min •Pressure: 5.5MPa •Temperature: 25°C pH:6.5
*The above values are sample observed values, not the guaranteed performance. |
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Operating Conditions |
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| pH range |
2-10(1-11)* |
| Max. pressure |
6.9MPa |
| Max. feed flow rate |
42Lmin(S4)·200L/min(S8) |
| Min. concentrate flow
rate |
10Lmin(S4)·45L/min(S8) |
| Max. operating temperature |
40°C |
Tubid content in feed water
(as FI value) |
4 or Less |
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*pH range in short-term use such as cleaning.
*They are not necessarily representing optimum operating conditions. Please contact Nitto Denko’s sales representative for advice on using this product. |
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