Duplex / change over filter KDF-K manufacturing range
Duplex / change over Filter KDF-V DN 150 and DN 200
Duplex / change over filter KDF-V back and front view
Duplex / change over filter KDWF front view

Krone Filter Solutions GmbH       +49 4207 987690 We are a leading international filter manufacturer. We can provide the right filter for any application!

Duplex / change over filters

Krone filter manufactures 3 different types of duplex / change over filters. The main difference is the switching device

  • Type KDF-K uses a so called cock switch
  • Type KDF-V uses an valve switch mechanism
  • Type KDF-W uses a ball valve switch

Duplex filters can use basket strainers or other kind of filter inserts as filtering media like bags (bagfilters) or cartridges which can be made of different materials beginning from metalls up tp PP, PE, PTFE or glassfibres ect.

KDF-K duplex filters

The KDF duplex filter can be used universally as a coarse and fine filter on the suction or on the pressure side. Filter operation is maintained without interruptions during the cleaning phase. The duplex filter is casted as one and consists of two identical single filters which can be operated alternatively or in parallel via a changeover cock switch device. The single filter consists of a cast body, cover and filter insert. The filter insert is a basket strainer made of perforated sheet metal / perforated plate covered with a mesh made of different materials and mesh sizes. The medium to be filtered enters the filter from above, generally flowing through the insert from the inside outward. Impurities are left in the strainer insert, accordingly.

The KDF duplex filter can be used in pressure and suction modes and is versatile for coarse and fine filtration. It is characterized by continuous filter operation during the cleaning possibility. The filter is compatible with the KSF series. The filter combines the so-called housing sizes (GR) with the various nominal widths (DN) of the flange connection. KDF-K has a bolts and nuts lock and can also bedelivered with screws and nuts as well as with a quick acting lever lock (medium-dependent - risk analysis required). Subsequent on-site retrofitting is also possible.

Brief description and function

The duplex filter, cast as a component, comprises two identical single filters, connected via a cockswitching device to a filter side or can be operated in parallel. Medium to be filtered enters the filter basket from the top and flows through the insert inside out. Dirt thus remains in the filter element. As a special version, the filter is also available with star filters.

Product images

Krone Filter Solutions GmbH       +49 4207 987690 We are a leading international filter manufacturer. We can provide the right filter for any application!

KDF-V duplex filters

KDF-V filters have a special developed valve switch which is very easy to operate under pressure switching conditions. Also this switch has no leakage tot he closed vessel part and therefore can be used also for applications which do not allow any fluid leackage during cleaning process. The vessels can be casted ductile iron or casted steel, fabricated of carbon steel or stainless steel.

Product Data Sheets

Product images

Krone Filter Solutions GmbH       +49 4207 987690 We are a leading international filter manufacturer. We can provide the right filter for any application!

KDW-F duplex filters

KDW-F Filters are specially developed duplex change over filters which have afabricated vessel body and they can be individually adapted for the application of service with all extras requested.

Product images

Product Data Sheets

Krone Filter Solutions GmbH       +49 4207 987690 We are a leading international filter manufacturer. We can provide the right filter for any application!