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(028) 6258 5368LG SW 400 R G2
The LG SW 400 R G2 is LG Chem’s second-generation seawater reverse osmosis (SWRO) membrane, featuring advanced Thin-Film Nanocomposite (TFN) technology. It delivers exceptional treatment efficiency and energy savings, with a salt rejection rate of up to 99.88% and a permeate water flow rate of 9,000 GPD (34.1 m3/d). This makes it an ideal choice for single and multi-pass seawater RO systems design requiring balanced permeate water quality and energy efficiency.
Product features
- Advanced proprietary Thin-Film Nanocomposite (TFN) technology: Enhances treatment efficiency and water quality.
- Superior salt rejection: Achieves a salt rejection rate of up to 99.88%.
- Improved water quality: Increases water quality by up to 45% compared to conventional polyamide membranes.
- Energy efficiency: Maintains high permeate water quality while reducing energy consumption.
- Fouling resistance: Offers excellent durability and anti-fouling technology.
- Certified safety: Meets NSF/ANSI/CAN 61 standard for drinking water system components.
- Cost savings: Reduces operational and investment costs for seawater RO systems.
Specifications
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Permeate flow rate
9,000 GPD (34.1 m3/d)
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Stabilized salt rejection
99.88%
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Stabilized boron rejection
93%
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Maximum applied pressure
1,200 psi (82.7 bar)
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Active membrane area
400 ft2 (37 m2)
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Feed spacer thickness
34 mil
Selecting the right RO membrane for a seawater treatment system requires a thorough understanding of its technical specifications and operating conditions. Below is detailed information about the LG SW 400 R G2 membrane, including its performance, features, and applications.
1. Technical specifications of the LG SW 400 R G2 membrane
Understanding the technical specifications is essential for choosing the right RO membrane. Below are the detailed specifications of the LG SW 400 R G2:
SPECIFICATION | VALUE |
---|---|
Permeate flow rate | 9,000 GPD (34.1 m3/d) |
Stabilized salt rejection | 99.88% |
Minimum salt rejection | 99.75% |
Stabilized boron rejection | 93% |
Active membrane area | 400 ft2 (37 m2) |
Feed spacer thickness | 34 mil |
2. Operating specifications of the LG SW 400 R G2 membrane
To ensure efficient operation and long-lasting performance, please adhere to the following operating specifications:
SPECIFICATION | VALUE |
---|---|
Maximum applied pressure | 1,200 psi (82.7 bar) |
Maximum chlorine concentration | < 0.1 ppm |
Maximum operating temperature | 45°C (113°F) |
pH range, continuous operation | 2 – 11 |
pH range, cleaning | 2 – 13 |
Maximum feed water SDI15 | 5.0 |
Maximum feed water turbidity | 1.0 NTU |
Maximum feed flow | 75 gpm (17 m3/h) |
Maximum pressure drop (ΔP) for each element | 15 psi (1.0 bar) |
3. Key features of the LG SW 400 R G2 membrane
The LG SW 400 R G2 is designed to meet the most demanding seawater treatment requirements with the following standout features:
- Second-generation RO membranes: Part of LG Chem’s G2 series, offering advanced performance.
- Enhanced water quality: TFN technology improves water quality by up to 45%.
- Superior rejection: Exceptional salt and boron rejection capabilities.
- High permeate flow rate: Enhances system efficiency with a high permeate water flow rate.
- Energy efficiency: Maintains permeate water quality while reducing energy consumption.
- Anti-fouling technology: Extends membrane lifespan and reduces maintenance needs.

4. Advantages of the LG SW 400 R G2 membrane
The LG SW 400 R G2 SWRO membrane offers numerous advantages over other products on the market:
- Better water quality: Improves permeate water quality without increasing operating pressure.
- Lower energy costs: Reduces energy consumption without compromising permeate quality.
- Cost savings: Lowers CAPEX (Capital Expenditure) and OPEX (Operating Expenditure) for multi-pass seawater RO systems.
- Versatility: Suitable for a wide range of seawater RO systems.
- Certified safety: Meets NSF/ANSI/CAN 61 standard, ensuring safety and quality.
5. Certifications of the LG SW 400 R G2 membrane
The LG SW 400 R G2 undergoes rigorous testing and holds international quality certifications, ensuring reliability and stable performance:
- NSF/ANSI/CAN 61 Standard: Certification for drinking water system components.
For detailed certification information, visit: LG SW 400 R G2 membrane’s Certification

6. Applications of the LG SW 400 R G2 membrane
With its combination of high performance and energy efficiency, the LG SW 400 R G2 is widely used in seawater treatment systems, including:
- Seawater desalination plants: Provides high-quality water for coastal communities and industries.
- Single and multi-pass SWRO systems: Ideal for industrial parks, coastal hotels, and resorts.
- Industrial process water: Supports manufacturing and production processes requiring high-purity water.
- Municipal water supply: Ensures safe and reliable drinking water for urban areas.
7. ATS Water Technology – Authorized distributor of LG SW 400 R G2 membranes
ATS Water Technology Co., Ltd. is proud to be the authorized distributor of LG Chem’s LG SW 400 R G2 membranes in Vietnam. We are committed to providing high-quality products with clear origins and dedicated technical support.
With over 15 years of experience in the water treatment industry, ATS Water Technology delivers optimal solutions tailored to our customers’ needs. Contact us today for detailed advice and enthusiastic support!

ATS WATER TECHNOLOGY CO., LTD
- Headquarter: 54/18 Bui Quang La, Ward 12, Go Vap District, HCMC, Vietnam
- Branch office: 77 DHT10B, Dong Hung Thuan Ward, District 12, HCMC, Vietnam
- Consultation and support: (028) 6258 5368 – (028) 6291 9568
- Email: info@atswatertechnology.com
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