Stills come in all sizes, shapes and materials of construction.
A Still is basically a tank with some means of injecting steam at the bottom of the tank in a way that allows its uniform distribution, such as perforated crosses or plates, false bottoms, manifolds etc. The opening of the still can be a simple manhole cover or a full size lid with the same diameter as the tank, depending on the unloading method. Most stills operate at atmospheric pressure, some are designed to stand higher pressures, in the 2 bar range. Condensers are of various types. The oil separator is the one component which is the most critical to the overall product recovery and profitability of the plant, whether conventional or continuous.