Screens

High-performance screens for solid-liquid separation in wastewater pretreatment.

Rotatory screens
Defender®

Rotary screens are pre-treatment equipment used to separate solid waste from clean water through a filter drum. This drum can be either screen or perforated depending on the type of solids to be treated.

TR SMART®

New!

We have developed an optional intelligent programme for our rotary sieves. It is equipped with a frequency inverter designed specifically for the motor, which guarantees low energy consumption. It operates as a stand-alone machine that does not require any configuration or parameterisation, just plug and play. The TR-Smart® integrates a data logger based on historical values, which calculates the optimal start-up speed in any application, avoiding overflow and the frequency inverter adjusts the screen speed automatically.

In addition, it measures the amount of dirt accumulated in the equipment, and decides when to start the cleaning cycle.

MODELS OF SCREENS

Several different screen models are available depending on the flow requirements.

Capacity
  • From 7 m3/h up to 363 m3/h in clean water
  • Small flow rates
  • High performance with high solids load
  • Smaller filter surface
Description
  • Produces polished effect, high output water quality
  • Protected from outlet overloads
  • Robust, high strength infused GRP lamella construction,no colapsa.
  • Easy cleaning

MODELS OF MESHES

Perforated

Mesh size from 2 to 3 mm Ø

Grid

Mesh size from 0.15 to 2mm

ROTARY SCREEN FUNCTIONING

  • The effluent to be treated enters through the flange on the outside of the screen body and is evenly distributed through the spillway and overflow through the filtering drum.
  • The solids are retained on the surface of the drum while it is rotating, the spill penetrates through the mesh opening and performs a self-cleaning function by passing through the lower part of the drum again.
  • As it passes through the outer scraper, the solids are released from the screen and gravity causes the solids to fall off the scraper.

OPERATION OF ROTARY SCREEN

  • The effluent to be treated is pumped or pressurised to the screen head.
    After a certain retention time, determined by the filling of the screen’s feed box, a laminar overflow occurs in which the liquid slides smoothly through the filter mesh.
  • In this sliding process, the liquid passes through the screen (most of it in the first section), with the solids retained on the screen surface and falling to the bottom and draining out of the screen. and out of the screen. The filtered liquid falls into the lower tank The filtered liquid falls into the lower tank and is evacuated by gravity through a pipe.
  • By means of a lifting structure, it is possible to install the equipment can be installed at the head of the plant, so that it can move on to the next stage of the treatment stage without the need for pumping.

MANUFACTURING

  • Safe designs with high quality materials
  • Manufactured in 316 L stainless steel.
  • GRP components and protections.
  • Incorporates effective safety system.
  • GRP flanges with DIN/ANSI connection.
  • Pressurised water cleaning system for the filtering drum.
  • Shot blasted finish.
  • Solids scraper adjustment

PARTS

Filter drum
Drive Unit
Sensor
Cover
Cleaning system
Cleaning scraper

References

AREAS OF APPLICATION

  • Paper industries
  • Foods
  • Wineries
  • Dairy
  • Meat
  • Canneries
  • Fish
  • High oil content
  • Laundry
  • Biodiesel
  • Tanneries and textiles
  • Urban

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