Answer: The main purpose of a separator funnel is to separate two immiscible liquids. The mechanism relies on the different density of the particles in the mixture to work.
Process:
We can witness the creation of two layers when the liquids are poured into the funnel. The liquid that is denser sinks to the bottom, while the liquid that is less dense rises to the top. The denser liquid is collected in a conical flask at the bottom. The valve lets you decide how much and when the liquid flows down to the conical flask.