The Lanxess Lewabrane® RO B400 HF is a high-performance reverse osmosis membrane designed for sophisticated industrial water treatment applications. This advanced membrane element offers exceptional performance characteristics for treating brackish and low salinity waters.

Key Technical Specifications
- Salt Rejection Rate: 99.5% average (minimum 99.0%)
- Membrane Active Area: 37.2 m² (400 ft²)
- Permeate Flow Rate:
- Average: 39.9 m³/day (10,500 gpd)
- Minimum: 31.9 m³/day (8,400 gpd)
Performance Characteristics
- Operating Pressure: Maximum 41 bar (600 psi)
- Operating Temperature: Maximum 45°C (113°F)
- pH Range:
- Operating: 2-11
- Cleaning: 1-12

Attribute | Details |
---|---|
Model Name/Number | B400 FR ASD |
Brand | Lanxess |
Membrane Material | Polyamide |
Size | 40 x 7.9 x 1.125 inches |
Active Area | 37.2 m² |
Operating Pressure | 41 bar |
Maximum Operating Temperature | 45°C |
Min Salt Rejection | 99.7% |
Output of Water | 41.5 m³/d |
The Lewabrane® Reverse Osmosis B400 HF membrane by Lanxess is a spiral-wound, composite polyamide membrane designed for industrial water treatment applications. It is particularly suited for treating brackish and low salinity waters, primarily for demineralization in boiler water and process water applications.

Element Testing Conditions:
- Applied pressure: 55.2 bar (800 psi)
- NaCl concentration: 32,000 mg/L (or a mixed solution of 32,000 mg/L NaCl and 5 mg/L Boron)
- Operating temperature: 25°C (77°F)
- pH: 8
- Recovery rate: 8%
Additional Information:
- Handle RO elements with care and avoid dropping them.
- Each RO element is wet-tested, preserved in a 1% sodium bisulfite solution, and vacuum-packed in oxygen barrier bags.
- Store in a cool, dry environment. Avoid freezing and direct sunlight, with storage temperatures below 35°C (95°F).

After Installation:
- Keep RO elements wet and use a compatible preservative for storage periods longer than 7 days.
- During initial startup, discard the first 30 minutes of permeate to drain.
- Ensure that permeate back pressure does not exceed feed pressure.
- Maintain the RO elements in a clean condition, free from particulate matter, precipitates, or biological growth.
- Clean the elements if the pressure drop increases by 20% or water permeability decreases by 10%.
- Use only chemicals that are compatible with the membrane.