i think that this is the best explanation that i could give, please look at the tutorials made in "", sorry i could give any more explanations but that will be to much to write.
by
peter nagy , senior accountant , HELWAN FERTILIZERS COMPANY SAE (H.F.C)
All RO systems have the same basic components. Water flows through a valve that attaches to the cold water supply line into a tube that attaches to the RO pre-filter. There may be one ore more pre-filters, depending on the type of RO membrane used in the system. The most commonly used pre-filter removes dirt and sediment from the water. A carbon pre-filter may also be used to remove chlorine. Pre-filters prevent membrane fouling, extending the life of the reverse osmosis membrane. Water flows from the pre-filter(s) through the RO membrane which removes the majority of dissolved impurities. This is the most important component of any reverse osmosis filtration system. The purified water then flows into a storage tank. Once the storage tank is full, a shut-off valve prevents more water from passing through the membrane, temporarily halting water production. The RO unit comes with it's own faucet, which is usually installed on the kitchen sink, apart from the regular faucet. When the RO faucet is turned on, purified water flows from the storage tank, through a post-filter which removes any remaining tastes and odors from the water, which is then ready to drink. A drain line runs from the outlet end of the RO membrane housing to the drain; this line disposes of the impurities and contaminants removed from the incoming water source (See Fig. 2).
