For the benefit of the layman, the explanation in this online informational article will be very brief.
A characteristic feature of well-known and well-utilized busch vacuum pumps is that there will be no air flow within these pumps. If air flow does exist in some of these pumps it would be extremely minimal. A note to the layman. Note that a variety of vacuum pumps exist and these varieties cater for all kinds of purposes. One such purpose dictates that during a process of cleaning out waste, there must be no disruption.
There should be no likelihood of any form of contamination. You can perhaps see that this is a technology that has its beneficial use within the health services sectors. And, since it directly impacts on consumers, you may as well include the food services industry. Now this is an easy and common example to utilize. The vacuuming or pumping procedure may not be as complex on the industrial scale but the objective operates on pretty much the same principle. You should be able to relate if you are an appreciator of fine, fresh, as in, always fresh food, particularly in your meat products.
Not only does meat taste exceptionally better than otherwise when it is vacuum sealed, it is also devoid of all bacteria and any other harmful pollutants. Because of its high demand and the complexities surrounding your source supplies, it remains necessary to utilize freezing technologies in order to ensure that every day consumables are functional and safe to use. And this does not apply to food alone. Go back to the health services sectors and think prescribed medicine. Even surgical instruments in certain instances need to be vacuum protected.
And paint tech today requires the use of vacuum pumps as well.