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Bow Screen - Pressure

The Type TS Bow Screen is a simple and effective unit capable of separating fiber as small as 100 microns in length from a water suspension.

The TS Bow Screen is a very compact piece of equipment. It has few moving parts and requires minimum maintenance. The screen plate is made of wedge bars forming a bowed surface with horizontal slots between the bars. Normal slot width is 150 microns.

The flow to be screened is fed through a pressurized nozzle with an adjustable slice. The slice flow is distributed evenly across the full width of the screen plate. The flow is directed tangentially down the screen surface at optimum 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.

Working Principle
Fibers in suspension align 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 the screen plate blinds over during unusual conditions, it can easily be cleaned with a water hose – even during operation.

In exceptionally difficult applications the screen can be equipped with an oscillating cleaning shower that is automatically activated for intermittent cleaning of the entire screening surface.

Main Applications:

  • Fiber recovery
    • Rich white water
    • Pulp press pressate
  • Pulp thickening
    • Couch trim
    • Screen rejects
    • Cleaner rejects
  • Felt hair removal
  • Deinking stock washing
  • Fiber fractionation
  • Fiber/filler separation


Screen Model Width* Length (B) ** Height Height (A) Net Weight
TS-1 1314 mm (52") 891 mm (35") 1840 mm (72") 450 mm (18") 440 kg (970 lbs)
TS-2 1314 mm (52") 1636 mm (64") 1840 mm (72") 650 mm (26") 670 kg (1480 lbs)
TS-3 1314 mm (52") 2381 mm (94") 1840 mm (72") 1100 mm (43") 980 kg (2160 lbs)

* With automated slide opening. The optional manual slice opening adds 30 mm (1") to the overall width of the machine.
**Oscillating front cleaning showers, available as an option, add 365 mm (14") to the overall length of the machine.

The water consumption per screen plate for optional cleaning showers is 130 l/min (35 gpm) for oscillating front showers and 220 l/min (60 gpm) for stationary back showers. The shower water pressure requirement is 7.0 bar (100 psi).

Slot width selections include 50, 75, 100, 150, 200 and 250 microns, depending on application.

  • Low maintenance cost – few moving parts
  • High turndown capability
  • Superior operating flexibility due to adjustable slice

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