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Both turbine and motor (i.e both are in the same compressor shaft) coupled with single compressor. Both turbine and motor are running at the same time. V have a lube oil system which supplying lube oil for turbine governor, T&T valve and compressor lubrication system. My main lube oil pump got fail while running and subsequently auxiliary lube oil pump came online. Still it can't build up the required pressure. Which resulted in Compressor motor trip. But my compressor was keep on running as the T&T valve was not shut. It resulted in compressor shaft damage.
So my question is how my T&T valve was not shut (lube oil is holding that spring loaded valve) when lube oil pressure had go down and my auxiliary pump didn't develop the required pressure? During this incident there is heavy rainfall that may result in low lube oil pressure. Can u able to identify the root cause of the problem? When lube oil pressure is really low it might have resulted in T&T valve shut down.
So my question is how my T&T valve was not shut (lube oil is holding that spring loaded valve) when lube oil pressure had go down and my auxiliary pump didn't develop the required pressure? During this incident there is heavy rainfall that may result in low lube oil pressure. Can u able to identify the root cause of the problem? When lube oil pressure is really low it might have resulted in T&T valve shut down.