Pocket filters

Pocket filters G3 and G4 may be used as a main filters or as a pre-filters before the filters  F5 - F9.

Pocket filters  F7 - F9  may be used as a main filters or as a pre-filters before the filters  HEPA   H11 -  H14.

DIN EN 779	G3	G4	F5	F6	F7	F8	F9
Eurovent	EU3	EU4	EU5	EU6	EU7	EU8	EU9

 

Structural peculiarities:

• Specific conical structure
• Vertical pocket projection is trapezium-shaped, while the vertical pocket projection is conical. Conical structure of filtering pocket affects airflow distribution inside the pocket and prevents pockets from sticking together during operation
• Filtering pockets are sewn using specific threads; holes formed after puncturing with needle are sealed with using hot adhesives

 

Frame of filter

Standard profile of frame is 25 mm width.  The frames of filters are from plastic or galvanize steel.

 

Filter material

Filter material is used in all pocket filters from Class G3 to Class F9. Lower class filters (from G3 to F5/F6) have teaselled non-woven polyester materials with 8-20 µm fibre for coarse dust filter media. Such materials are coupled thermally and mechanically and charged electrostatically.

Higher class filter materials are applied fusion and blow technologies. This allows producing even thinner microfibres (1-10 µm) and thereby enlarge inner surface of filter medium.