General Information
SW 2521 RO membrane offers sustainable consistency, high rejection rate, low energy performance and lower lifecycle cost.
Features & Advantages
- Stable salt rejection rate at high feed TDS
- Higher permeate flow rate at lower operating fluxes
- Lower operating cost through reduced energy consumption
- Economical equivalent element for direct replacement
Applications
- Seawater desalination
- Minimal or zero liquid discharge
- Landfill leachate sewage treatment
- High-salinity wastewater concentration
- Other applications with feed TDS above 10,000 ppm
Specifications
-
Configuration: Spiral wound element
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Membrane Polymer: Polyamide thin-film composite
Performance
Element Model |
Membrane Active Area ft2 (m2) |
Feed Spacer mil (mm) |
Permeate Flow Rate* GPD (m3/d) |
Stabilized Salt Rejection** |
Minimum Salt Rejection |
Boron Rejection |
TFSW-2521 |
14 (1.3) |
28 (0.712) |
250 (0.9) |
99.7% |
99.6% |
92% |
Element Dimensions

Size |
Length L |
Diameter D |
Permeate tube |
Permeate tube |
2521 |
21 (533) |
2.4 (61) |
0.75 (19) |
1.19 (30.2) |
Operating and Cleaning Limits
Maximum Operating Pressure |
1,200 psi (83 bar) |
Maximum Operating Temperature |
45°C (113°F) |
Maximum Chlorine Concentration |
0.1 ppm |
pH Range, Continuous |
2-11 |
pH Range, Cleaning |
1-13 |
Maximum Feed SDI (15 mins) |
5 |
Maximum Element Pressure Drop |
15 psi (1 bar) |
Maximum Feed Flow |
1.4 m3/h |
Minimum Ratio of Concentrate to Permeate Flow for Each Element |
5:1 |