Valves for the separation of cryogenic air

Cryogenic air separation is nowadays one of the most proven methods for separating air into its components on an industrial scale. In this process, the ambient air is first drawn in through a filter and compressed. The air is then cooled and unwanted impurities such as dust and carbon dioxide are removed in the absorbers. Through heat exchange and expansion, the air can be cooled further until it reaches a temperature between -170°C and -193°C.

The different pressure levels and temperatures make it possible to separate the components of the air according to their state (liquefied or gas) and store them in storage tanks or make them directly available.

Air gases are suitable as a source of energy, as a component of fuels, as a propellant and as a basic component for chemical reactions. They have many applications in industry, transport, medical research and everyday life. Companies and organisations around the world use air gases in their processes to optimise operations.

New air separation plants are regularly built or existing plants are overhauled, revised or expanded. Each scenario has specific challenges for which valve manufacturers offer solutions and provide a comprehensive portfolio of valves and services.