1. Dual stage reverse osmosis:

Raw water (tap water, surface water, groundwater) is pressurized and sent to the pre-treatment system for coarse filtration, then enters the precision filter for filtration, and is pressurized by the first stage high-pressure pump and sent to the first stage reverse osmosis system. The water produced by this system is then pressurized by the second stage high-pressure pump and sent to the second stage reverse osmosis system to produce product water, which is called two-stage reverse osmosis.

2. Process flowchart:

Double stage reverse osmosis is suitable for water with a conductivity greater than 500 μ s/cm, and the effluent conductivity is 1-10 μ s/cm.