Selection and Application of Primary Filters

Basic characteristics of primary filters

The primary filter is mainly targeted at large particle pollutants above 5 μ m, such as dust, pollen, fibers, etc. Its filtration efficiency is generally between 20-40% (for 3-5 μ m particles), and the initial pressure drop is usually between 30-50Pa.

Main types and selection points

1. Flat panel: simple structure, low cost, suitable for general ventilation systems

2. Folding: Large filtering area, high dust holding capacity

3. Automatic winding type: can automatically replace filter media, suitable for high dust environments

Selection considerations

1. Processing air volume

2. Environmental dust concentration

3. Allowable pressure drop of the system

4. Maintain convenience

Typical application scenarios

1. First stage filtration of air conditioning system

2. Pre filtration of industrial plants

3. Ventilation system for commercial buildings