The primary pure water is filtered continuously and repeatedly by the second stage reverse osmosis, and then treated by the third stage reverse osmosis for dialysis treatment.

The recovery rate of primary concentrated water is greater than 85%, the concentrated water produced by the second and third levels can be 100% recovered, and the raw water can be diluted in the balancer to reduce the concentration, so as to further improve the reverse osmosis water quality and extend the service life of the membrane.

All levels of the system can use a higher water flow to wash the membrane surface, which will not cause waste of water resources.