Drumscreen

rs

rOTO-sIEVE DrUM sCrEEN

®

®

Läckeby products manufactures, markets and sells roto-sieve drum screens, which separate solid particles and fibres from liquids by screening. the drum screens are based on proven technology with a self-cleaning function that delivers very good results and minimises maintenance.

With high operational reliability, a long service life and low energy consumption, Roto-Sieve drum screens are a proven good investment. Due to its internal feed and circular perforations, Roto-Sieve offers the best separation that can be achieved mechanically. It has been shown in practice that a fibre or hair has a very small chance of orienting itself at a right angle and against the water current, so that it can pass through a round hole.

Technical features

• • • • Low energy consumption High degree of separation High operational reliability Good utility in many applications

Process benefits

• Enhances processes, for instance in treatment works • Reduces need for cleaning • Makes servicing easier • Reduces running costs of subsequent stages

The diagram shows a circular hole with Ø 1.0 mm on an internally-fed Roto-Sieve drum screen, compared with a 0.5 mm opening along the drum’s rotating direction on an externally-fed screen.

11 10

8 9

4

7

2

1

6

5

3

Function Roto-Sieve drum screens consist of a perforated drum (1) with internally fixed screw (2), which transports the separated particles out of the drum. The drum rotates on trunnion wheels (3) and is driven by a cog gear motor (4). Incoming liquid is fed into the drum through an inlet pipe (5), which distributes the water over a large area of the drum’s interior. During passage through the drum, the liquid is screened through the drum’s perforations and collects in the trough (6) underneath. Separated particles are transported out of the drum through the screenings outlet (7). Dewatering continues throughout transport in the drum. To prevent clogging of...