Top 10 RO Membrane Manufacturers in China (2025)
Below is a list of the top 10 reverse osmosis (RO) membrane manufacturers in China, based on available information from industry sources, including their reputation, product range, and market presence. The list focuses on companies specializing in RO membranes and related water treatment technologies, primarily for industrial, commercial, and municipal applications. Note that rankings may vary depending on specific criteria like production capacity or innovation, but these are prominent players as of the latest data.
（Ranking in no particular order）
. Vontron Technology Co., Ltd.
Background: Established in 2001 and headquartered in Guiyang, China, Vontron is one of the leading domestic RO membrane manufacturers, specializing in high-performance reverse osmosis and nanofiltration membranes. The company emerged from Chinese Academy of Sciences (CAS) research, ensuring strong R&D capabilities.
Technology & Market Position: Vontron’s membranes are widely used in household water purifiers, industrial wastewater treatment, and seawater desalination. The company holds over 100 patents and supplies membranes globally, competing with DuPont and Toray. Its LP (Low-Pressure) and ULP (Ultra-Low-Pressure) series are popular for energy efficiency.
Key Products:
- LP series (brackish water treatment)
- ULP series (low-energy consumption)
- FR series (high fouling resistance)
Competitive Edge: Vontron is known for cost-effective alternatives to imported membranes while maintaining high salt rejection rates (up to 99.7%).
. Bluestar (Hangzhou) Membrane Technology Co., Ltd.
Background: A joint venture between China’s Bluestar (ChemChina) and Japan’s Toray Industries, founded in 2009. Bluestar Membrane leverages Toray’s advanced RO technology while benefiting from China’s manufacturing scale.
Technology & Market Position: The company focuses on ultra-high-purity water for semiconductors, seawater desalination, and power plants. Its TMG and TML series are widely used in large-scale desalination projects (e.g., Middle East and China).
Key Products:
- TMG series (high-flow seawater RO)
- TML series (low-energy brackish water)
- TMS series (for ultrapure water in electronics)
Competitive Edge: Combines Toray’s R&D with China’s cost-efficient production, making it a strong competitor to Hydranautics and DuPont.
. Beijing OriginWater Technology Co., Ltd.
Background: Founded in 2001, OriginWater is a leading Chinese environmental tech company, specializing in membrane bioreactor (MBR) and RO technologies. It’s listed on the Shenzhen Stock Exchange (300070) and works closely with municipal water projects.
Technology & Market Position: Known for integrated wastewater treatment solutions, OriginWater supplies RO membranes for industrial and municipal use, including China’s South-North Water Diversion Project.
Key Products:
- Household & industrial RO membranes
- Large-scale MBR-RO hybrid systems
Competitive Edge: Strong government support and large-scale project experience in China.
. Shanghai CM Environmental Technology Co., Ltd.
Background: Founded in 2009 and headquartered in Shanghai, CM Environmental Technology began as an OEM/ODM manufacturer of ultrafiltration (UF) membranes, producing replacements for Japanese brands like Asahi Kasei, Toray, and Mitsubishi. Over the years, it expanded into reverse osmosis (RO) membranes, nanofiltration (NF), and membrane bioreactors (MBR), establishing itself as a globally competitive membrane supplier.
Technology & Market Position:
- 2012: Launched residential and industrial RO membranes, becoming a top seller in Vietnam, Thailand, and the Middle East.
- 2013: Added MBR production lines, offering alternatives to GE and Mitsubishi products, with CE and ISO 9001:2015 certifications.
- 2019: Officially branded as "CM" for overseas markets, becoming a Verified Supplier on Alibaba and Made-in-China.com.
- 2020: Developed complete RO systems (0.25–50 tons/hour) and seawater desalination systems (250 L/day–100 tons/day), certified by SGS USA.
- 2021: Formed a global wastewater service team for on-site project support.
- 2022: Expanded production with Jiangsu (5,000 m² for MBR/UF) and Zhejiang (20,000 m² for RO) factories.
Key Products:
- RO Membranes: Seawater desalination, low-pressure, brackish water.
- Nanofiltration (NF) Membranes
- Ultrafiltration (UF) Membranes: PVDF/PAN/PES materials.
- MBR Systems: Hollow fiber & flat sheet membranes.
- Integrated RO Water Treatment Systems.
Competitive Edge:
- Strong OEM/ODM heritage with cost-effective alternatives to Japanese/American brands.
- Global presence: Exports to 60+ countries, participates in 10+ international exhibitions annually (e.g., Russia, UAE, Brazil).
- Vertical integration: From membranes to full-scale systems and on-site services.
. Keensen Technology Co., Ltd.
Background: A subsidiary of Koch Separation Solutions (USA), Keensen operates in China with advanced RO membrane production. It focuses on high-rejection, low-fouling membranes for harsh industrial conditions.
Technology & Market Position: Supplies chemical, pharmaceutical, and food & beverage industries, competing with Dow and Toray.
Key Products:
- Industrial brackish water RO
- Seawater desalination membranes
Competitive Edge: Koch’s global R&D combined with localized production.
. Suzhou Runmo Water Treatment Technology Co., Ltd.
- Overview: A leading RO membrane manufacturer with collaborations with high-tech U.S. companies, expanding globally.
- Products: RO membranes, membrane elements, water purifiers, and filters for various water treatment solutions.
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Strengths: Advanced technology partnerships and a growing international sales network.
. Jiuwu Hi-Tech Co., Ltd.
Background: A Nanjing-based company (founded 1997) specializing in ceramic and polymeric membranes, including RO for biopharma and food processing.
Technology & Market Position: Known for high-precision separation, used in vaccine production and dairy processing.
Key Products:
- Pharmaceutical-grade RO membranes
- Food & beverage filtration
Competitive Edge: Niche applications with high purity standards.
. MOTIMO Membrane Technology Co., Ltd.
Background: A Tianjin-based company (founded 2003) focusing on hollow fiber and RO membranes for wastewater treatment.
Technology & Market Position: Supplies municipal and industrial projects, with strong MBR-RO integration.
Key Products:
- Industrial wastewater RO
- Seawater pretreatment membranes
Competitive Edge: Cost-effective for large-scale projects.
. Suntar Environmental Technology Co., Ltd.
Background: A Xiamen-based company (listed in 2019) providing integrated membrane solutions for chemical and biopharma industries.
Technology & Market Position: Specializes in high-selectivity RO membranes for API purification.
Key Products:
- Pharmaceutical RO membranes
- Chemical separation systems
Competitive Edge: High-purity applications in regulated industries.
. Yantai Harvest Membrane Technology Co., Ltd.
- Overview: A professional manufacturer of special separation membranes, recognized as a national high-tech enterprise.
- Products: RO, NF, and spiral-wound UF membrane elements for drinking water purification, wastewater treatment, and desalination.
- Strengths: Advanced automated production lines, customized membrane solutions, and exports to countries like Thailand, Japan, and Russia.
Notes:
- Sources: The list is compiled from web sources, including industry reports and manufacturer websites, ensuring relevance to RO membrane production in China.
- Selection Criteria: Companies were selected based on their specialization in RO membranes, market reputation, R&D capabilities, and application diversity. Some global players like Toray or DuPont operate in China but are not included as they are not Chinese companies.
- Availability: For detailed specifications or to contact these manufacturers, platforms like Made-in-China.com, Alibaba, or their official websites are recommended.
- Critical Perspective: While these companies are prominent, the RO membrane market in China is highly competitive, with varying quality. Buyers should verify certifications, compliance with standards (e.g., WHO or local regulations), and customer reviews before purchasing. Some sources may overstate capabilities, so due diligence is advised.
If you need further details on any specific manufacturer, product comparisons, or assistance with sourcing, let me know!
About the Author
Hi, I'm Chris Li. I'm the father of a 6-year-old boy, andI've also worked in the water treatment industry for 16years.l would like to share some of my understandingof this industry with you, and l hope it can be helpful.
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