Pretreatment: generally including raw water pump, dosing device, quartz sand filter, activated carbon filter, precision filter, etc. Its main function is to reduce impurities, reduce the pollution index of impurities such as raw water and residual chlorine, and meet the requirements of reverse osmosis. According to the specific situation of raw water, determine the equipment configuration of pretreatment system.

Reverse osmosis: mainly includes multistage high-pressure pump, reverse osmosis membrane element, membrane shell (pressure vessel) and support. Its main function is to remove impurities in water and make the effluent meet the use requirements.

Post-treatment: it is an added configuration, which is equipped when reverse osmosis cannot meet the effluent requirements. It mainly includes one or more devices such as anion bed, cation bed, mixed bed, sterilization, ultrafiltration and EDI. The post-treatment system can improve the quality of reverse osmosis effluent and meet the use requirements.

Cleaning: mainly composed of cleaning water tank, cleaning water pump and precision filter. When the polluted effluent index of reverse osmosis system cannot meet the requirements, reverse osmosis needs to be cleaned to restore its efficiency.

Electrical control: mainly including instrument panel, control panel, various electrical protection, electrical control cabinet, etc. Its main function is to control the normal operation of the whole reverse osmosis system.