Deaerators commonly are used to remove oxygen and other gases from the closed pipe systems, in which are flowing liquid. Deaerators are useful because they remove the gases that attach to the metallic components of the steam system and cause corrosion by forming oxides, or rust. None of these are wanted and with deaerators you can save a lot of money and avoid to damages in the future.
The advantages of the unique construction which is the crucial difference for efficient deaeration - microbubbles of air can rise in the fluid because of the static (Laminar no flow zone).