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The ONTOZ SW 4021 is a high-rejection seawater reverse osmosis membrane engineered for compact desalination and marine water treatment systems. Designed to deliver exceptional salt removal and consistent permeate flow under high-pressure conditions, it ensures reliable freshwater production from seawater. Proudly Made in India and NSF Certified, it offers outstanding durability, energy-efficient performance, and long service life for demanding desalination applications.
✔ Made in India premium seawater RO membrane
✔ NSF Certified for trusted quality and safety
✔ 99.5% minimum and 99.7% stabilized salt rejection
✔ Designed for high-pressure seawater desalination applications
✔ High permeate flow with consistent freshwater production
✔ Excellent fouling resistance for reliable long-term performance
