RO equipment has high requirements on inlet water quality. Generally, the inlet water quality shall meet the following requirements:
1. Temperature: 1-45 ℃

2. PH value: 2-11

3. Organic matter content: (COD, ≤ 1.5mg/L

4. Turbidity (NTU):<1.0NTU

5. SDI Value:< 4.0.

6. Residual Chlorine:< 0.1mg/L

7. Iron content (mg/L): Dissolved oxygen> 5mg/L, Fe< 0.05.

8. Silica content (mg/L): SiO2< in concentrated water; 100; LSI：pHb-pHs< 0.

9. Sr, Ba and other ions easy to form insoluble salt: Ibb< 0.8Ksp。