The Walchin Anti-Pollution Reverse Osmosis Membrane Series is designed to deliver enhanced performance compared to traditional reverse osmosis membranes. Key improvements include:
These enhancements result in significantly improved anti-pollution capabilities, reducing the need for chemical cleaning, minimizing shutdowns, and ultimately lowering operating costs.
As a new generation of high-efficiency separation, concentration, and purification technology, Walchin's anti-pollution membrane is widely used in industries such as:
✅ Pure water preparation
✅ Seawater desalination
✅ Wastewater treatment
These reverse osmosis membranes are critical components of RO systems, ensuring reliable, cost-effective water purification with minimal maintenance.
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Performance parameters
Model |
Membrane Type |
Membrane area/ft² |
Flow GPD(m³/d) |
Stable desalination rate/% |
TW-4040-FR |
Polyamide composite membrane |
90 |
1900(7.2) |
99.4 |
Water production floating range:±15%
Model/Size(mm) |
A |
B |
C |
D |
TW-4040-FR |
40.0(1016) |
1.05(26.7) |
0.75(19) |
3.9(99) |
Test conditions
Test solution concentration(NaCl) |
Water temperature(℃) |
pH |
Operating pressure psi(MPa) |
Recovery rate(%) |
2000ppm |
25 |
7.5-8 |
225(1.55) |
15 |
Operating Limits
Maximum working pressure |
600psi(4.14MPa) |
Maximum water inlet temperature |
45℃ |
Maximum water inlet flow |
16GPM(3.6m³/h) |
Maximum water inlet SDI15 |
5 |
Maximum residual chlorine concentration(mg/L) |
0.1 |
Inlet water pH range during continuous operation |
2-11 |
pH range of influent water during chemical cleaning |
1-13 |
Maximum allowable pressure drop of a single membrane element |
15psi(0.1MPa) |