The air that surrounds us on earth is made out of different gases – nitrogen (about 80%) and oxygen (about 20%) being the most important two. The average atmospheric pressure on earth is 1013 millibar.
As you go higher, for example in the mountains, you will feel the atmospheric pressure decreasing. This is where the term vacuum actually begins. Try for yourself by sealing an empty plastic bottle in an airplane, during a flight kilometers up in the air. Once back on the ground, you will find the bottle squished in, due to the pressure difference.
Vacuum is an environment with less than 1 atmosphere of air (oxygen, nitrogen and other gases) and is subdivided in different gradations: low vacuum, middle- or fine vacuum, high vacuum and ultra high vacuum.
A lot of technologies and (production) processes depend on vacuum and wouldn’t be able to be applied under the normal, everyday atmospheric pressure. Think about a vacuum cleaner, the suction pad (picking up and moving subjects), the traditional light (bulb or halogen lamp), the television, think about the coating on windows and glasses, the print board and the electronic chip. But most of all don’t forget the medical world (oncology and laser treatment), the research institutes and the aeronautics- and space research institutes.
The above shows, that vacuum is applied all over the world. Vacuum can be created relatively with (different kinds of) vacuum pumps, which pump the air out of vacuum chambers. The size of such a vacuum chamber can vary from just a few cm3 to >2000m3.
Demaco is experienced in advice, engineering and production of specific vacuum systems for the most different applications.