Filtering flasks and seals

A feeding bottle is a kind of thick-walled Erlenmeyer flask with an opening on the side. It is used in vacuum filtration where it serves as a holding vessel for the filtrate. A vacuum pump is connected to the side opening (usually in the form of a water jet pump) with a possible cold trap. The filter (nutsche or frit) is located on the top opening, where it is firmly connected to the feeding bottle by means of rubber sleeves and conical rubber seals (called guko).

A Wittscher pot can also be used instead of a feeding bottle. The feeding bottle is also known as the Büchner bottle, in memory of the German chemist Ernst Büchner.

You can buy these suction bottles and seals at Laboratory discounter with a fast delivery for a friendly price.