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Bild 5.31: BOGE-Sterilfilter, Baureihe ST | Living organisms such as bacteria, bacteriophages and viruses are a big health problem in many areas. Sterile filters create 100 % sterile and germ-free compressed air.
Operating principle
The pre-purified flow of air is directed from outside towards the inside through the filter element. The filter element is composed of two filter stages. The pre-filter retains microorganisms up to a size of 1 µm. The second filter stage consists of a chemically and biologically neutral, three-dimensional microfibre web made of borosilicate. The remaining organisms are filtered out here. The filter elements are fixed in place by a stainless steel cage.
The filters can be cleaned and sterilised up to 100 times. They are steamed for this purpose. In this process, hot steam of up to +200° C flows through the filter. The steam can be sent through the filter from both sides. Sterilisation by other media is also possible.
- Gas (ethylene oxide, formaldehyde)
Features
- Stainless steel material.
All metal parts of the filter are made of high-alloy stainless steel. Stainless steel offers microorganisms no nutritive substratum and can neither corrode nor rot.
- Resistent.
The filter medium is inactive and resistent to chemicals and high temperatures. Bacteria can not grow on or through it.
- Short sterile contact distances.
A sterile filter should be installed directly on the end consumer device.
Areas of application
- Food and luxury food industry.
- Pharmaceuticals industry.
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