The Deaerator Tank, is used to separate the O2 and CO2 gases in the steam boiler feed water, which cause melting, perforation (corrosion).
If the boiler feed water cannot be purified from these gases, the life time of the entire system will be shortened, corrosion and punctures may occur in the boiler, devices and installations in a very short time.
To purify the boiler feed waters from O2 and CO2 gases, they must be degassed by passing them through the deaerator device.