The Walchin Brackish Water Series is specifically designed for water with high alkalinity, neutral salts, and a pH value greater than 7. Walchin's brackish water reverse osmosis membrane provides high-performance filtration, removing:
The key benefits of our membranes include:
This makes it the ideal solution for brackish water desalination and purification across various industries, offering cost-effective, reliable water treatment.
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Performance parameters
Model |
Membrane Type |
Membrane area/ft² |
Flow GPD(m³/d) |
Stable desalination rate/% |
BW-8040-FR |
Polyamide composite membrane |
400 |
9600(36.3) |
99.5 |
Water production floating range:±15%
Model/Size(mm) |
A |
B |
C |
D |
BW-8040-FR |
40.0(1016) |
1.05(26.7) |
7.9(201) |
1.125(29) |
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 |
75GPM(17m³/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 Inlet water during chemical cleaning |
1-13 |
Maximum allowable pressure drop of a single membrane element |
15psi(0.1MPa) |