Basic flow diagram for water vending machine：
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Basic Water Treatment Components
The TDS of the source water determine what stages of pretreatment to be used . Generally sand filter, activated carbon filter, water conditioner and filter cartridge vessels are used for pretreatment system to prolong the service life of RO system.
Reverse Osmosis Unit：
To eliminate salt, bacteria and heavy metals from feed water to get pure water, Higher permeate flow and low concentrate membrane should consider for cost cutting.
To meet the drinking water quality standard , the flow rate of pure water through the sterilizers must comply with the required flow rate of the units.