FAQS
1. What is the LG SW 400 ES membrane?
The LG SW 400 ES is an 8-inch seawater reverse osmosis (SWRO) membrane designed for seawater desalination and energy-efficient RO applications. It is suitable for appropriately designed industrial and commercial desalination systems.
2. What is the permeate flow rate of LG SW 400 ES?
The LG SW 400 ES has a nominal permeate flow rate of 6,800 GPD (25.7 m³/day) under the 600 psi test condition specified by LG. LG also provides a reference performance of 13,700 GPD (51.9 m³/day) at 800 psi.
3. What is the salt rejection of LG SW 400 ES?
The membrane provides 99.6% stabilized salt rejection and 99.3% minimum salt rejection under the 600 psi test condition. At the 800 psi reference condition, LG reports 99.8% stabilized and 99.6% minimum salt rejection.
4. What is the active membrane area of LG SW 400 ES?
The LG SW 400 ES has an active membrane area of 400 ft² (37 m²).
5. What is the boron rejection of LG SW 400 ES?
The membrane provides 81% stabilized boron rejection under the 600 psi test condition. At the 800 psi reference condition, LG reports 89% stabilized boron rejection.
6. Is LG SW 400 ES suitable for seawater desalination?
Yes. LG Water Solutions lists the SW 400 ES in its seawater reverse osmosis product range, and its product data sheet identifies multi-pass desalination plant design as an ideal application.
7. What makes LG SW 400 ES an energy-saving RO membrane?
The LG SW 400 ES is designed to provide high permeate production with reduced feed pressure and energy consumption compared with conventional higher-pressure seawater RO operation. LG identifies reduced feed pressure and energy consumption as key benefits.
8. What is the feed spacer thickness of LG SW 400 ES?
The LG SW 400 ES uses a 34-mil feed spacer. LG states that the thicker feed spacer contributes to improved fouling resistance.
9. What are the operating limits of LG SW 400 ES?
LG specifies a maximum applied pressure of 1,200 psi (82.7 bar), maximum operating temperature of 45°C, continuous operating pH range of 2–11, and cleaning pH range of 2–13.
10. What are the standard test conditions for LG SW 400 ES?
LG's 600 psi test condition uses 32,000 ppm NaCl, 5 ppm boron, 25°C, pH 8, and 8% recovery. The 800 psi condition is provided as a reference. Actual membrane performance can vary depending on feed-water quality and operating conditions.
11. What is the difference between LG SW 400 ES and LG SW 400 R?
The SW 400 ES focuses on energy-efficient seawater desalination, with 6,800 GPD nominal flow and 99.6% stabilized salt rejection under its primary test condition. The SW 400 R provides higher nominal flow and higher salt rejection, making it more suitable when higher permeate production and rejection are priorities. The appropriate model depends on the RO system design and required water quality.
