Feed water system
In a boiler feed water system following sub systems are involved. FST Booster pump Boiler feed pump Drive of boiler feed pump (motor or turbine) High pressure feed water heater Feed regulating station / feed control station Economiser Feed Storage Tank Water is pumped from feed storage tank to the boiler or boiler drum with the help of boiler feed pump. there are two or three boiler feed pumps are installed in a single unit. this is a high pressure pump. the discharge pressure of this pump is greater than that the boiler drum pressure due to which water in flow in to the boiler drum. Boiler feed pump is a special type of pump. this is a multistage pump. generally a multistage pump is called as a turbine type pump. FST(Feed Storage Tank) is a part of Deaerator which reserve store the treated condensate water. fst may be an integral part of deaerator or it may be installed bellow the deaerator tank. The FST is installed at a specific height to provide the NPSH to the boile