Polymer Processing Systems

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BKG® HiCon™ V-Type Double Piston Power Backflush Screen Changer

Normal operation:
4 screen cavities (100%) in the process

3 screen cavities (75%) in the process

Screen change:
During a screen change one of the screen cavities (25%) is removed from the process, allowing for three of the screen cavities (75%) to remain in operation

Suitable for almost all processes and materials. It is used in pressure constant processes (e.g. strap, film, fiber) as well as processes with insufficient back pressure for backflushing (e.g. strand pelletizing) and can manage processes with a high proportion of contaminates (e.g. recycling). The system enables process runs to continue without any system shutdowns while changing the screen.


  • Pressure, process and volume flow constant operation attributed to the patented and integrated power backflush technology, regardless of the extrusion pressure
  • Fully automated backflush and venting procedure (via PLC) reduces operator intervention
  • Significant reduction in operating costs (screen & labor costs) is ensured by up to 200 backflushes 
  • Four (4) screens enable a large filter area in a compact and small housing, while the backflush amounts during the self-cleaning process are minimal



  • Highly efficient backflush via patented power backflush technology, regardless of the extrusion pressure
  • During the process steps “backflush” and “screen change,” 3 of the 4 screens remain in production at all times
  • Optimized flow channels utilizing rheological data
  • Wear-free metallic sealing system – no additional seal required
  • Easily integrated into the line controls