I have problem to analyze in petrochemical ethylene plant ,the problem with ethylene compressor RT-10 , when the operator turn main oil pump off MOLP or the pump goes off for any reasons the aux. ALOP pump delayed to takeover Feeding oil to the bearings in other words to pressurized the line to 9.5 kg/cms ,which dramatically caused total S/D to the RT-10 compressor , although the pump in auto- mode and pressure switch PZA1059-L activated normally at 8.4 kg/cms, my question how that happened and how I can start to investigate TO OVERCOME THE PROBLEM.
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