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          3F Screen

          3F Screen

          Application


          For removal of flat, narrow and long foreign matters (Heavies) and light weight contaminants suchas corks, plastic pieces. This is most suitable for primary Screening after the pulpers. The information given below shows the relation between stock consistency and Screen Perforation for selection.

          Sizes


          Consistency(%) : 3
          Hole Perforation (in mm) : 5 - 3
          Slot Perforation (in mm) : 1.5 - 1.0

          Consistency(%) : 2.5
          Hole Perforation (in mm) : 3 - 2.5
          Slot Perforation (in mm) : 1.0 - 0.7

          Consistency(%) : 2
          Hole Perforation (in mm) : 2.5 - 2.0
          Slot Perforation (in mm) : 0.7 - 0.4

          Consistency(%) : 1.5
          Hole Perforation (in mm) : 2 - 1.5
          Slot Perforation (in mm) : 0.4 - 0.3

          Consistency(%) : 1
          Hole Perforation (in mm) : 1.5 - 1.2
          Slot Perforation (in mm) : 0.3 - 0.15

          Consistency(%) : 0.5
          Hole Perforation (in mm) : 1.2
          Slot Perforation (in mm) : 1.15 - 0.1



          Specification


          Middle Body : consist one no. stock int for tangential feeding the stock is being accelerated by rotating impeller.

          Bearing Body : and rotor with perforated extraction plate is fitted in the upper body.

          Bed bar : In additional to breaking the stock, the bed bar acts upon the change of flow from rectified to trubulent, to minimise the flake contents.

          Accept stock outlet : The stock entering under high pressure is exposed to impact and shear forces caused by the impeller / Bed bar for defibration and goes upward through perforated extraction plate while foreign matters down into the tail cyclone for removal.

          High pressure back water pump : It takes water from Thickner tank & clarified water is fed to tail cyclone making pulp consistency low and also in main unit to increase turbulence.

          Setting tank / Junk removal tank : The heavies rejected in tail cyclone settle in the junk tank for intermittent manual removal.

          Floating stock out let : The stock flowing in the settling tank together with the heavies goes upwards to get through the floating stock outlet at the top of tank and enters the circulation pipe limked to the control part of the main unit.

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