When choosing the maximum compression pressure, we must always take into account the highest pressure of the equipment we supply ... if they all work at 6.5 bar - choose a compressor with a working pressure of 8 bar and set it so that it automatically turns on at 7 bar (unfortunately, it is often impossible to control compressor operation using a pressure switch - reciprocating compressors or basic screw compressors) - then we choose the 10 bar version. In the case of screw compressors controlled by a controller and digital pressure measurement, it makes no sense to choose a higher compressor pressure than we really need - it is economically unjustified. Higher compression pressure results in lower compressor efficiency, higher electricity consumption and increased compressor wear due to higher compressor operating temperature.