what is saturated steam

Saturated steam is the type of steam that occurs when the liquid and gaseous phases of water exist simultaneously at a given temperature and pressure. It is pure steam in direct contact with the liquid water from which it was generated and at a temperature of water at the existing pressure. Saturated steam is in equilibrium with heated water at the same pressure, meaning it has not been heated above the boiling point for its pressure. It is also known as dry steam, and it contains the minimum amount of heat it can hold at a given pressure without beginning to change state to a liquid. If more heat is added to saturated steam after it reaches its saturation temperature (boiling point), the steam is said to be superheated steam. Saturated steam is advantageous in heat transfer due to the high latent heat of vaporization, making it a very efficient mode of heat transfer.