What is the working principle of an oil-gas separator?

[McZachary]

The working principle of an oil-gas separator is as follows: 1. When the oil-gas mixture enters the separator through the inlet pipeline, it is sprayed onto the oil baffle cap (dispersing cap). The dispersed oil-gas mixture then slides down along the pipe wall by gravity to the lower part of the separator and is discharged through the oil discharge pipe. 2. Meanwhile, the gas in the mixture, due to its lower density, rises upward. It changes flow direction after being concentrated by the separation umbrella, which causes small oil droplets in the gas to adhere to the umbrella wall. These droplets then gather and flow down along the umbrella wall. The degassed oil is discharged, while the gas, now free of oil, exits through the top gas outlet pipe of the separator and enters the pipeline for gas measurement.