A rigid frame, composed of U-sections with transverse reinforcements. It is a fully welded construction.
Guiding profiles are welded on the chassis for the wheels.
The grill consists of a number of parallel bars. For grids up to 20mm bar spacing a hydrodynamic section applied. For more than 20mm the bars are rectangular. They are reinforced to eliminate distortion.
The rake moves down in open position. In the lower position the rake moves towards to the grate bars. The teeth of the rake penetrate between the bars.
The solids are moved along the bars; on a guiding plate they are moved to the surface.
When the rake is in upper position the solids are pushed back with a scraper. All movements are smoothly without shocks or any noise.
The rake is powered by two rigid chains. The chains are guided by rollers. There are no moving parts under the water level.
The rake is driven by a hermetically sealed IP55 gear motor.
In case of overload, the movement of the rake is stopped by means of a torque limiter.
The screen is built-in vertically or at an angle of 10 to 20° to the vertical.
The entire screen is secured to the CE regulations.
The screen is fully automatic. The cleaning cycle can be set with a time clock or with a difference in level measurement.