{"id":229203,"date":"2021-01-04T11:24:06","date_gmt":"2021-01-04T10:24:06","guid":{"rendered":"https:\/\/dev22.het-filter.de\/filter-groups-and-filter-types\/"},"modified":"2024-09-27T17:04:06","modified_gmt":"2024-09-27T15:04:06","slug":"filter-groups-and-filter-types","status":"publish","type":"post","link":"https:\/\/het-filter.de\/en\/filter-groups-and-filter-types\/","title":{"rendered":"Filter groups and filter types"},"content":{"rendered":"\n

Dust collectors<\/a> and filter systems are used in the pharmaceutical and chemical industries to bind the dust generated during production. In the filter cells installed in it, the particles are separated from the air, so that in the end clean air is created and the danger from the dust is eliminated.<\/p>\n\n

The type of dust or the composition of the air mixture as well as the requirements from the process result in the selection criteria for the filter cells.<\/p>\n\n

Filter cells are available in various types, designs and materials. The following article is intended to give a brief overview of the construction methods and classifications of filters.<\/p>\n\n

In order to be able to compare the individual filter cells in their various designs with each other or to compare them with the requirements from the process, there is a classification system that is defined on the basis of standards.<\/p>\n\n

The correct selection and maintenance of filtration systems and their components is crucial to ensure air quality, guarantee the safety and efficiency of the production process and ensure compliance with environmental and health regulations.\nThe following article provides a detailed overview of the different designs, filter groups and classifications of filters to assist industry professionals in selecting the best filtration solution for their specific needs. <\/p>\n\n

Classification of the filter cells<\/h2>\n\n

In order to be able to correctly assign the various filter classes or filter groups, an overview of the air filters considered should first follow in order to show when which classification applies.<\/p>\n\n

Air filter overview<\/h3>\n\n

Air filters are classified according to their ability to separate particles of different sizes.<\/p>\n\n

There are \u201cdust filters\u201d that are used for high dust loads and coarser particles in the air. These are further subdivided into \u201ccoarse dust filters\u201d and \u201cfine dust filters\u201d \u2013 depending on the particle size. For these filters, classification is based on the EN ISO 16890<\/a> standard.<\/p>\n\n

If finer or finest particles are to be filtered, \u201cHEPA filters\u201d are used. Here, a further subdivision is made into \u201cstandard HEPA filters\u201d and \u201chigh-efficiency HEPA filters\u201d. Here, too, the classification is based on the actual particle size. Classification is based on the EN 1822-1<\/a> standard.<\/p>\n\n

Classification according to EN ISO 16890<\/h3>\n\n

The basis of the classification is the filtration efficiency of the filter cell. This indicates how many particles are retained by the filter medium and how many particles can still be found in the exhaust air after passing through the filter. The value that is of importance here is the separation efficiency of particles with sizes from 0.3 \u00b5m to 10 \u00b5m.<\/p>\n\n

Based on this value, the corresponding filter group can be assigned in accordance with the EN ISO 16890<\/a> standard.<\/p>\n\n

The standard provides for 3 levels according to which the filter cells are classified:<\/p>\n\n