Steam is made from water, which is vaporized into steam by absorbing heat energy through a heat transfer device (heat exchanger). Steam is divided into wet steam, saturated steam, and superheated steam according to its state.

As a general civil industry, due to the use of customary and piping pressure level limitations, general factories (textile, chemical, pharmaceutical, food, beverage, electronics, tobacco) processes use steam are low-pressure saturated steam, the pressure is generally not more than 2.5Mpa.

Steam generation, control, use, and condensate recovery constitute the entire steam system, and the derived steam and condensate process is one of the largest energy consumption points in a factory.