English to Dutch Tech/Engineering Petroleum Eng/Sci simulation manual for a crude distillation unit

The overflash is the additional reflux that is required to scrub the heavies that may entrain into the bottom most side draw (HGO) from the flash zone, thereby affecting its color. The liquid stream from the flash zone descends the trays in the bottom section, where it is stripped with LP steam (3.5 BAR) to recover lights from the bottom product.