Your dephlegmator acts for a partial reflux condenser. It’s primarily a heat exchanger that condenses a percentage of vapor and sends the alcohol-enriched liquid back towards the plates to further more enrich forthcoming vapor. The procedure explained stabilizes the ABV of the products gathered in comparison with primary pot stilling. https://archermaowf.blogoxo.com/26924476/considerations-to-know-about-reflus-stills