temperature of saturated steam
1 Vacuum steam is the general term used for saturated steam at temperatures below 100Â°C.  Example - Boiling Water at 212 oF and 0 psig. At atmospheric pressure - 0 psig - water boils at 212 oF. 180 Btu/lb of energy is required to heat 1 lb of water to saturation temperature 212 oF.