Description: the rated inlet pressure of the plant specified for normal working conditions; Name: nominal input pressure of the plant 
Description: Inlet pressure of the installation for the working conditions; Name: Rated inlet pressure of the installation
Description: The operating underpressure PS2- is the maximum value of the operating underpressure defined from a safety point of view by the manufacturer of the system for the various components in relation to the atmospheric pressure (1 bar) at the maximum permissible temperature TS2; Name: Max. permissible underpressure PS2- at TS2, room2