Setting of oil injection points for reciprocating compressors
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What are the requirements for the oil filling points? Why is there one oil injection point for the first-stage filler, while there are two oil injection points for the second and third stages?
In my opinion, the main reason is that the compression environments at levels 2 and 3 are relatively harsh, with higher temperatures. But ours all have one oiling point; different manufacturers consider things from different perspectives.