What is the top part of a still called?

The top part of a still is called a cap. It is the removable component that sits on top of the still and is responsible for collecting and condensing the vapor produced during the distillation process. The cap is designed to fit securely on the still and is typically shaped in a way that allows for efficient vapor flow and separation.

There are various types of caps used in different styles of stills, and they are often named based on their specific shapes. Some common types of caps include the onion-shaped cap, the helmet-shaped cap, and the dome-shaped cap. Each of these shapes has its own advantages and is suited for different distillation purposes.

The cap plays a crucial role in the distillation process by allowing the vapor to rise from the boiling liquid and then condensing it back into a liquid form. This condensation occurs as the vapor passes through the cap and comes into contact with cooler surfaces, causing it to lose heat and transform into a liquid. The cap is designed to facilitate this condensation process efficiently.

In my personal experience with distillation, I have used various types of caps depending on the still I was using and the type of spirit I was producing. I remember using an onion-shaped cap on a pot still when distilling whiskey. The unique shape of the cap helped to create a reflux effect, allowing for better separation of impurities and producing a smoother spirit.

It is important to note that the cap is just one component of the still and works in conjunction with other parts such as the pot or boiler, condenser, and collection vessel. These components together form the distillation apparatus and allow for the separation and purification of alcohol or other desired substances.