screen basket of the Vertical Screw Thickener VST
  • PULP & PAPER products
  • Pulp production
  • Mechanical pulp
  • Vertical Screw Thickener

Vertical screw thickener: The latest innovation in dewatering

The pioneering Vertical Screw Thickener is a screw press with a vertical configuration and a very small footprint, making it suitable for retrofit installations in existing buildings. The pulp suspension is fed into the top of the machine, and its downward transport is gravity-assisted.

Learn more about the VST and watch the product introduction!

Presented by Peter Ortner, ANDRITZ Product Manager

Benefits of the VST

  • Higher production – or higher output dryness at the same production – compared to a screw press of the same size
  • Highest dewatering efficiency (particularly for low feed consistencies)
  • 100% filling degree
  • Uniform dewatering from top to bottom
  • Small footprint
  • Telescoping filtrate housing for easy access to screw and screens

VST: pulp is feed from top

© Croce & Wir

VST: pulp discharge at the botton

© Croce & Wir

Dewatering physics of the vertical cocept


Find out more ...

Mechanical pulp

Technology for mechanical pulp producers.

Read more

Stock preparation pilot plant

Customer trials, research and development.

Read more

Stock preparation systems

Systems made from high-quality, individual fiber preparation components

Read more
Contact us
  • Vertical Screw Thickener VST

    The latest innovation in dewatering

    PDF : 549 KB
  • Pilot plant Graz

    Fiber preparation pilot plant, for customer trials, research and development

    PDF : 938 KB