FFK

Bag filter cassette for rectangular ducts

  • Easy installation to rectangular ducts in any position

  • Various class filters available as option

  • Quick release latch

  • Premounted pressure ports





Flat/Vertical installation

The FFK filter cassette is designed to be easily installed to the rectangular ducts in any position. Used together with bag filters of the various filter classes. 

Robust construction

The FFK filter cassette has a robust construction. The cassette housing is manufactured from galvanised sheet steel with standard rectangular flanges.

Ready for pressure measurement

The FFK filter cassette is fitted with premounted pressure ports for connecting to a pressure sensor/pressure relay. 

Easy filter change

The FFK filter cassette has a hinged cover that is equipped with a quick-release latch. This makes it easy to replace the filter. 

Application: Bag type filters cassettes FFK are applied for supply and extract air purification in rectangular duct ventilation systems. Designed to clean supply air and can be used as main purification filter or as first stage purification filter before more efficient filters.

Design: The casing is made of galvanized sheet steel. The filter cassette has standard rectangular 20mm flanges for easy connection to the air ducts. The hinged access cover equipped quick-relase latch to provide easy and quick access to the filter during maintenace.

Filter: The FFK filter cassette is available in different sizes and designed for use with bag filters of various classes: Coarse 60%(G4), Coarse 70%(M5), ePM2.5 50% (M6), ePM1 60% (F7), ePM1 85% (F9) (according to ISO 16890 / EN 779). All filters available as accessory. The filters used in the filter cassette must be replaced periodically on a regular basis. The frequency of replacement depend on how the product is used and in what environment the filter cassette is located. For easy indication/monitoring of filter contamination we recommend pressure switch/monitor (accessory) which can be easily connected to preinstalled pressure ports. The recommended final pressure drop for the contaminated filter is:

  • For Coarse class filters: lowest value between (Initial Pressure for clean filter + 50Pa) and (3 × Initial Pressure for clean filter).

  • For ePM class filters: lowest value between (Initial Pressure for clean filter + 100Pa) and (3 × Initial Pressure for clean filter)

Installation: The FFK filter cassette can be installed to the rectangular ducts and should always be fitted in a flat or vertical position. When fitted vertically, the direction of the airflow must be downward so that the filter bags do not collapse. Access to the access cover shall be provided for the filter replacement.