In order to achieve a certain required operating condition a control operation is carried out either on the installation, the compressor drive or on the compressor itself.
The selection of this control should be done in such a way, that with a minimum of design and energy costs a reliable control of the plant is achieved. If the control is carried out automatically in such a way that one or several operation parameters are held at a certain level (in general at a constant level) in relation to time, this control is then called a regulation. In the following, a few characteristic examples are presented. Table 6.1 shows control operation options for different components.