BWF Envirotec air conditioning filters pocket filters

Pocket filters
The most frequently used filtering element in ventilation systems

Filter pockets are produced in a metal or synthetic frame. The number of pockets depends on the technical aspects of ventilation systems. The raw materials used in the production process, filter medium and production technology guarantee proper filtration properties and feature a long service life (as desired by customers).

Standards:

Pocket filters are manufactured to standards:

  • ISO 16890

  • PN EN 779:2012

Fire rating:

  • F1 wg DIN 53438

Standard dimensions:

Frame sizes in pocket filters are fully standardized. The most popular are:

  • 592 x 592 mm

  • 490 x 592 mm

  • 287 x 592 mm

  • 287 x 287 mm

Frame thickness:

  • 20 mm, 25 mm

Pocket length:

  • 200 mm, 300 mm, 360 mm, 500 mm, 600 mm


BWF Envirotec produces non-standard dimensions upon request or according to a sent format.

Materials:

The arrangement of polyester or polypropylene fibres with a progressive structure guarantees a minimum ratio between filter efficiency and resistance.

Construction:

Pocket filters in metal frame

A filter frame made of galvanised sheet steel guarantees long-term corrosion resistance. Filtering pockets stitched with industrial sewing machines ensure a long-term bond. Mounted in the frame on steel wires glued to the frame with temperature resistant adhesive. Depending on the dimensions, the in-curved edge of the wire ensures proper adherence to the frame and prevents it from slipping off and coming unglued. The sides of pocket packages are stuck to the frame and sealed with technical foam which guarantees a proper sealing.

Pocket filters in plastic frames

The filter frame is made from black plastic. Pockets are joined together with a specially designed profile made from plastic using a pneumatic machine or sewing machines. Both of them provide suitable adhesion and fitting in the filter frame. The sides of pocket packages are stuck to the frame and sealed with technical foam, which guarantees proper sealing.

Technical data pocket filters:

Classification according to the standards of PN - EN 779:2012   G3 G4 M5 M6 F7 F8 F9
Filtration effectiveness according to  ISO 16890* % COARSE COARSE ePM10 35-70 ePM10 60-80 ePM1 40-65 ePM1 65-90 ePM1 80-90
Frame dimensions mm 592 x 592 592 x 592 592 x 592 592 x 592 592 x 592 592 x 592 592 x 592
Airflow m³/h 3400 3400 3400 3400 3400 3400 3400
Intitial pressure drop Pa 18 - 55 22 - 65 45 - 65 55 - 95 90 - 140 95 - 175 110 - 195
Recommended final pressure drop Pa 250 250 450 450 450 450 450
Max. permissible operating temperature °C plastic frame 80; metal frame 100 plastic frame 80; metal frame 100 plastic frame 80; metal frame 100 plastic frame 80; metal frame 100 plastic frame 80; metal frame 100 plastic frame 80; metal frame 100 plastic frame 80; metal frame 100
Pocket length mm 200, 300, 360, 500, 600 200, 300, 360, 500, 600 200, 300, 360, 500, 600 200, 300, 360, 500, 600 200, 300, 360, 500, 600 200, 300, 360, 500, 600 200, 300, 360, 500, 600
Number of pockets pcs 6 or 8 6 or 8 6 or 8 6 or 8 6 or 8 6 or 8 6 or 8

*final results are given in the offer or when ordering

Application:

  • G2, G3, G4 – in ventilation and air-conditioning installations of rooms with average air purity requirements, e.g. hotels, office buildings, shopping centres, etc.
  • M5, M6, F7, F8, F9 – in ventilation and air-conditioning installations of rooms with high air purity requirements, e.g. hospitals, food and electronics industries, etc.

Air conditioning filters of BWF Envirotec, Polska at a glance

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