The term “fine filter” is an umbrella term for a relatively fine degree of filtration and is often used in the fields of solid/liquid separation, water separation, and compressed-air filtration. As their name suggests, fine filters are designed to separate the finest particles, and especially to minimize the residual oil content in air. They allow a residual oil content of less than 0.01 mg/m³ to be achieved.
In compressed-air applications, the machine manufacturers specify the “type” of compressed air with which their machines should be operated. In order to create clarity here, various compressed-air purity classes are defined in the DIN ISO 8573:2010 standard, which stipulates the maximum residual values for airborne particulate matter, water, and oil. To ensure comparability, all filters are tested and classified under standardized conditions.
Fine filters should always be designed and installed by a specialist.
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