diagram-of-compressor-operating-behaviorCompressor operating behavior in a characteristic diagramCompressor operating range (characteristic diagram)Surge limit,Stall limitWork line, steady operatingline, runninglineOperating point100%RPM characteristic linesMass throughflow*)Total pressure ratio *) Reduced mass throughflow = 10Blockage limitm . T P N T Reduced RPM = P= pressure, T=temperature.AccelerationSafe rangeUnstablerangeDistance to surge limit in operating pointDeceleration