Cassette filters are most frequently used as the first filtration level in air conditioning and ventilation units. Our technical potential enables us to produce filters using a minipleat filter medium (to increase filter surface) or lying flat. Depending on the dimensions of the filter, additional bars are installed. The unit is branded with a dimension label to help to identify the product properly.
Cassette filters are manufactured to standards:
PN EN 779:2012
F1 wg DIN 53438
Frame made from galvanized sheet metal, plastic or cardboard:
592 x 592 mm
287 x 592 mm
625 x 500 mm
20 mm, 25 mm,
50 mm, 96 mm, 100 mm
BWF Envirotec manufactures non-standard dimensions upon request or according to drawings and specifications of our customers.
Arrangement of polyester or polypropylene fibres with a progressive structure guarantees a minimum ratio between filter efficiency and resistance.
Cassette filters - media lying flat
A filter frame made of galvanised sheet steel guarantees long-term corrosion resistance. A filter medium is positioned between two meshes made from galvanized sheet steel.
Meshes enable stabilization and proper functioning of the filter medium. The frame is closed with a blind rivet.
Cassette filters - pleated material (z-line)
A filter frame made of galvanised sheet steel guarantees long-term corrosion resistance. The filter medium is pleated by machine on galvanised sheet steel mesh. The mesh enables stabilization and proper functioning of the filter medium. The frame is closed with a blind rivet and inductively welded.
"CLASSIFICATION ACCORDING TO
FILTRATION EFFECTIVENESS ACCORDING TO ISO 16890*
|Frame dimensions||mm||592 x 592||592 x 592||592 x 592|
|Construction||flat or pleated, depending on the thickness||flat or pleated, depending on the thickness||flat or pleated, depending on the thickness|
|Initial pressure drop||Pa||20 - 45||30 - 55||50 - 75|
|Recommended final pressure drop||Pa||250||250||450|
|Max. permissible operating pressure||°C||plastic frame 80; metal frame 100||plastic frame 80; metal frame 100||plastic frame 80; metal frame 100|
|Frame thickness||mm||6 - 100||6 - 100||6 - 100|
*final results are given in the offer or when ordering