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LG SW 400 R 9,000 GPD at 800 PSI 8 x 40 inch LG Water Solutions Membranes
LG SW 400 R 9,000 GPD at 800 PSI 8 x 40 inch LG Water Solutions Membranes
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For desalination plants and marine applications, reliably converting seawater into high-quality fresh water is the most critical aspect of the operation. The LG SW 400 R is a commercial-grade, 8-inch by 40-inch seawater reverse osmosis (SWRO) membrane engineered to meet the extreme demands of single and multi-pass desalination systems. Utilizing industry-leading Thin Film Nanocomposite (TFN) technology, this element provides the exact balance of high salt rejection and maximum productivity required to process medium to high salinity seawater. Built for heavy-duty, continuous operation, it ensures consistent, ultra-pure water production for large-scale municipal, industrial, and marine desalination facilities.
Under the hood, this membrane is engineered to maximize both water quality and energy efficiency. It features 400 square feet of active membrane area and utilizes a specialized 34-mil feed spacer specifically designed to improve fouling resistance, significantly extending the operational lifespan and time between required chemical cleanings. Designed to yield a massive permeate flow rate of 9,000 gallons per day (GPD), it achieves an outstanding stabilized salt rejection of 99.85% and a high boron rejection of 93%. Tested at a standard applied pressure of 800 PSI, this high-rejection membrane reduces the energy requirements of high-pressure booster pumps while safely handling a maximum applied pressure of up to 1,200 PSI. This provides operators with a lower total cost of desalination without compromising system output or water purity.
| Specification | Details | Notes |
| Manufacturer | LG Chem / LG Water Solutions | |
| Model Number | LG SW 400 R | |
| Element Type | Seawater Reverse Osmosis Membrane | High Rejection |
| Membrane Technology | Thin Film Nanocomposite (TFN) | |
| Active Membrane Area | 400 ft² (37 m²) | |
| Permeate Flow Rate | 9,000 GPD (34.1 m³/d) | |
| Stabilized Salt Rejection | 99.85% | |
| Minimum Salt Rejection | 99.70% | |
| Boron Rejection | 93.0% | |
| Test Pressure (Applied) | 800 PSI (55.1 bar) | Standard test conditions |
| Max Applied Pressure | 1,200 PSI (82.7 bar) | |
| Max Feed Flow Rate | 75 GPM (17 m³/h) | |
| Feed Spacer Thickness | 34 mil | Improved fouling resistance |
| Max Operating Temp | 113°F (45°C) | |
| Dimensions | 8.0" x 40" (200 mm x 1,016 mm) | Standard 8-inch footprint |
| Primary Applications | Seawater Desalination (SWRO) | Single and multi-pass systems |
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