When selecting a desuperheater it must be taken into account that this is not a standalone device. It is an important part of a system, and as such it has to be designed and sized in relation to the other system components and system parameters. Even the best desuperheater will not or insufficiently perform without correct sized control valves, the correct sensing- and control elements, a correct sizing of the connecting steam lines, sufficient straight pipe length up- and downstream of the unit, and eventual precautions against excessive noise.