I hope an expert can explain what the function of the check valves in the main oil pump and auxiliary oil pump of a centrifugal compressor is
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My question is why the check valve of the main oil pump is located at the inlet of the pump, while the check valve of the auxiliary oil pump is located at the outlet of the pump? Who can explain the reasons for these two?
It seems there was a similar post a few days ago: 【Check valves for the main oil pump and auxiliary oil pump in centrifugal compressors】. This ensures that there is always lubricating oil inside the equipment. The check valve of the auxiliary oil pump is located at the inlet of the pump, preventing the lubricating oil from flowing in a short circuit due to low pressure and thus not reaching the equipment. 】