Generally, boiler pressure is always higher than the production of saturated steam pressure, the reason is to overcome the pressure loss in the pipe or network. The actual production pressure plus the pressure drop required to overcome all pipe resistance plus a pressure margin of 25 to 30 percent is sufficient.

Boilers are divided into fuel oil gas boilers, coal-fired boilers, biomass boilers, electric boilers. Users have to consider the boiler fuel based on their specific situation including fuel cost and national environmental protection requirements.

In addition to boiler output, working medium parameters, fuel types three basic factors, there are other aspects such as external size, load volatility, water quality, air pollution, mechanization, automation degree, and the main and auxiliary machine selection.

If two or more boilers are needed, it’s better to select the boilers with same capacity or combustion equipment. If different, the max limitation is two models, to decrease the problems of equipment layout and management.