Nanofiltration membrane element
"SURO NF30-8040/4040、NF90-8040/4040"
· Introduction
The membrane element has a strong selective retention ability for low-priced and high-priced ions and a very low operating pressure. It is widely used in purification and desalination of drinking water, concentration and separation of sugars, various amino acids and organic acids etc.. It is suitable for surface water, waste seepage, printing and dyeing wastewater desalination or dehydration treatment. It can also be widely used in medical extraction, salt chemical industry, material concentration and other fields.
· Product specification
| Model | Effective membrane area ft²(m²) | Flux GPD (m³/d) | MgSO4 Rejection (%) | NaCl Rejection (%) |
| SURO NF30-8040 | 400(37.2) | 14000(52.9) | ≥97 | ≤30 |
| SURO NF30-4040 | 85(7.9) | 3200(12.1) | ≥97 | ≤30 |
| SURO NF90-8040 | 400(37.2) | 14500(54.8) | ≥98 | 85-95 |
| SURO NF90-4040 | 85(7.9) | 3500(13.2) | ≥98 | 85-95 |
· Test conditions
| Test liquid | Water temperature(℃) | pH | Operating pressure psi(MPa) | Recovery rate (%) |
| MgSO4 solution (2000 ppm) NaCl solution (500 ppm) | 25±2 | 7.5-8.0 | 100(0.69) | 15±1 |
Notes:The permeate flow of single membrane element may vary with in±15%.
· Limit operating parameter
| Maximum operating pressure | 600psi(4.14MPa) |
| Maximum inlet temperature | 45℃ |
| Maximum inflow rate | 17.0m³/h(8040)、3.6m³/h(4040) |
| Maximum inflowSDI15 | 5.0 |
| Maximum residual chlorine concentration | 0.1mg/L |
| pH range of inlet water in continuous operation | 2-11 |
| PH range of inlet water during chemical cleaning | 1-13 |
| Maximum transmembrane pressure difference for single membrane element | 15psi(0.1MPa) |