Product/Service

DSM Screen - Type 120°

Source: GL&V Pulp and Paper Group
The DSM Screen, type 120° , is a simple and effective unit capable of separating fiber as small as 100 microns in length from a water suspension.
The DSM Screen, type 120° , is a simple and effective unit capable of separating fiber as small as 100 microns in length from a water suspension.

The DSM Screen is very compact and requires minimum maintenance. The unique screen plate is made of wedge bars forming a bowed surface with horizontal slots between the bars. Normal slot width is 100 or 150 microns.

The flow to be screened is fed through a pressurized nozzle which distributes the flow tangentially over the full screen width by means of an adjustable slice providing optimum feed velocity. As the suspension flows along the screen plate, thin layers of water are "sliced off " by the screen bars and pass through the slots together with fine particles.

Key Benefits

    • Low maintenance costs
    • High turndown capability
    • Superior operating flexibility due to adjustable slice
    • Automated slice opening
    • Screen cleaning showers are optional
Main applications
Fiber recovery
  • rich white water
  • pulp press pressate
    Pulp thickening
  • couch pit trim
  • screen rejects
  • cleaner rejects
    PM broke
    Felt hair removal
    Deinking stock washing
    Fiber fractionation
    Fiber/filler separation Working principle
    Fibers in suspension orientate themselves in the direction of the flow. Thus, the majority of fibers longer than the slot width will be retained on the screen surface and slide down to discharge at 3-4% solids content, depending on the application. Under normal operating conditions the screen plates will provide a constant unhindered flow. If under unusual conditions they tend to plug up, they can easily be cleaned with a water hose - even during operation.

    GL&V Pulp and Paper Group, 1000 Laval Blvd., Lawrenceville, GA 30043. Tel: 770 963-2100; Fax: 770 822-2164.