What is the function of oil-gas separator in heat transfer oil boiler system?

Generally speaking, the new heat transfer oil contains moisture, which will evaporate during the heating process of the heat transfer oil. If the steam is not discharged from the heat transfer oil boiler, the oil outlet pressure of circulating heat transfer oil will fluctuate and be unstable. The function of the oil-gas separator is to separate the water vapor in the heat transfer oil and discharge it from the boiler, so as to ensure the stability of the oil outlet pressure of the heat transfer oil boiler.