Welcome to Sonar-DNB Group of companies, manufacturer of Paper Machine Hood, Coating Dryer & Yankee Hood.


POCKET VENTILATION SYSTEM


In the PV system offered by us, ambient air is heated upto a temperature of around 100 to 110c in steam air heaters and is then delivered by means of a centrifugal fan, via supply air ducting and blow boxes into the cylinder pockets through the permeable dryer screens for ventilation of cylinder pockets and also for conditioning of dryer fabrics.

This dry and hot supply air ventilates the cylinder pockets and provides a controlled drying environment by keeping a low and uniform humidity level in cylinder pockets.



Benifits of Pocket Ventilation System

  • Provides a controlled drying environment by keeping low and uniform humidity level in cylinder pockets.

  • Improves moisture profile across the paper web.

  • Increases Drying Capacity from 5 to 15 % depending upon Machine configuration, type of paper, GSM etc.

  • Increases the temperature inside Hood and thereby helps further in preventing condensation inside the Hood.

  • Overdrying of paper at the edges can be controlled by edge correction dampers of PV box.

  • Improves the life of Dryer screens and felt rolls.



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