MS6001B lube oil header pressure is about 1.75 to 1.9 bar.
is there any damage expected to the bearing if rise this pressure any more?

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Garri complex
STPG-Sudan

 

I don't really understand why you would want to do that. You would immediately having bearing sealing air problems as the seal air system is set up to balance against the standard 1.7 Bar supply, you will get leaks at the bearings. You are going to start and draw increased flow through your Lube system and the pumps may not be able to support it.
Please try and answer the first question, why would you want to do that? and we can take this discussion further