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- Low-Pressure Spiral RO Membrane Element ES15-D
Low-Pressure Spiral RO Membrane Element ES15-D
Widely Used for Primary Desalination in Ultrapure Water Production Systems and Desalination of Brackish Water.
Outline
ES15-D is a fully aromatic polyamide ultra-low pressure spiral RO membrane element suitable for applications such as primary desalination in ultrapure water production systems and desalination of brackish water. Its excellent features allow drastic reduction in electricity consumption, facility costs such as pumps and piping, and saves a required installation space.
Features
- The water permeate flow increased significantly while maintaining the NaCl rejection at 99.5% which is equivalent to the previous model.
- Enables extremely low-pressure operations at 0.5-0.6MPa.
Sizes
| ES15-D8 | Φ 201×1,016L[mm] |
|---|
Performances
| ES15-D8 | Rejection (％) | Permeate Flow[m3/d] | ||
|---|---|---|---|---|
| Nominal | Minimum | Nominal | Minimum | |
| 99.5 | 99.0 | 37 | 32 | |
[Evaluation conditions]●Evaluation solution: 0.05% NaCl solution Operating pressure 0.74MPa Water temperature: 25°C Recovery rate: 10～20%
*The above values are sample observed values, not the guaranteed performance.
*The above values are sample observed values, not the guaranteed performance.
■An example of desalination performance (4 inch element)
| Element | Water | Pressure | Rejection (％) | |
|---|---|---|---|---|
| Electric conductivity | TDS | |||
| ES10-D4 (ES15-D equivalent goods) |
*Well water | 0.5MPa | 96.5 | 99.4 |
| *Tap water | 98.4 | 99.3 | ||
| NTR-759HR-S4 | Well water | 1MPa | 96.9 | 99.6 |
| Tap water | 98.6 | 99.5 | ||
*Well water: Well water in Nitto Denko Shiga Plant (Electric conductivity 9.5ms/m)
Operating conditions: Water Temperature 16°C Recovery rate 14%
*Tap water : Tap water in Nitto Denko Shiga Plant (Electric conductivity 20ms/m)
Operating conditions: Water Temperature 16°C Recovery rate 14%
Operating conditions: Water Temperature 16°C Recovery rate 14%
*Tap water : Tap water in Nitto Denko Shiga Plant (Electric conductivity 20ms/m)
Operating conditions: Water Temperature 16°C Recovery rate 14%
Operating conditions
| Item | Unit | Recommended operating condition | Usage limit | |
|---|---|---|---|---|
| Operating pressure | MPa | Set according to the design Flux |
Max. 4.1 | |
| Operating temperature | °C | 5～30 | Max. 40 | |
| Turbid content in feed water as FI value | - | ≤3 | Max. 4 | |
| Concentration of residual chlorine | mg/L | 0 | Max. 1.0(during cleaning) | |
| pH range | - | 6～8(permissible range : 2～10) | 1～11(during cleaning) | |
| Feed flow rate | L/min | - | Minimum. 245 | |
| Concentrate flow rate | 75～85 | Max. 56 | ||
| Pressure drop | 1 element | KPa | <50 | Max. 80 |
| Over 5 element | <200 | Max. 410 | ||
*The figures show are only for the purpose of guidelines and not the guaranteed figures.
