It is a support menu from here.
Main Menu
- HOME
- Product Information
- Membrane Products
- Ultra-low Pressure Spiral RO Membrane Element ES20-D
Ultra-low Pressure Spiral RO Membrane Element
ES20-D
99.7% NaCl Rejection at 0.5-0.6 MPa Ultra-Low Pressure Operation.
Outline
ES20-D is a fully aromatic polyamide ultra-low pressure spiral RO membrane element suitable for applications such as primary desalination of ultrapure water production systems and desalination of brackish water. Its excellent features allow drastic reduction in electric consumption, facility costs such as pumps and piping, and saves required installation space.
Features
- The NaCl rejection is as high as 99.7%
- Enables extremely low-pressure operations at 0.5-0.6MPa.
Sizes
| ES20-D8 | Φ201×1,016L[mm] |
|---|---|
| ES20-D4 | Φ99.5×1,016L[mm] |
Performance
| Rejection [％] | Permeate Flow[m3/d] | |||
|---|---|---|---|---|
| Nominal | Minimum | Nominal | Minimum | |
| ES20-D8 | 99.7 | 99.5 | 30 | 26 |
| ES20-D4 | 6 | 5.5 | ||
[Evaluation conditions] •Evaluation solution 0.05% NaCl water solution •Operating pressure: 0.7MPa •Water temperature:25°C •Recovery rate: 10～20%
[Membrane surface area] Effective membrane surface area based on the product design.
*The above values are sample observed values, not the guaranteed performance.
[Membrane surface area] Effective membrane surface area based on the product design.
*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 | |||
| ES20-D4 | *Well water | 0.5MPa | 96.9 | 99.6 |
| *Tap water | 98.6 | |||
| 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: Temperature 16°C Recovery rate 14%
*Tap water : Tap water in Nitto Denko Shiga Plant (Electric conductivity 20ms/m)
Operating conditions: Temperature 16°C Recovery rate 14%
Operating conditions: Temperature 16°C Recovery rate 14%
*Tap water : Tap water in Nitto Denko Shiga Plant (Electric conductivity 20ms/m)
Operating conditions: Temperature 16°C Recovery rate 14%
Operating Conditions
| Item | Unit | Recommended operating condition | Usage Limit | |
|---|---|---|---|---|
| Operating pressure | MPa | Set according to the designed flux | Max.4.1 | |
| Operating temperature | °C | 5～30 | Max.4.1 | |
| 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 | - | Max. 245 (48 for4") | |
| Concentrate flow rate | 75～85 (15-25 for 4") | Min. 56 (12 for 4") | ||
| Pressure drop | 1 element | KPa | ＜50 | Max.82 |
| Over 5 element | ＜200 | Max.420 | ||
*Above figures are only for the purpose of guidelines and not the guaranteed figures.
