
Depending on their principle of operation, the proposed screens (grids) can be divided into static and rotary. In the first type the water is filtered through a static sieve, which separates solids from the treated water, which collects at the base of the equipment naturally due to the inclination of the grid itself. In the second type the sieve rotates assisted by a reducer, there is an installed barrier and a chute, which help the separation of the retained substances, and the nozzles installed in this type of equipment additionally protect from clogging. Another type of grille offered allows installation in open channels, in which case an auger installed in the equipment removes and compacts the captured solids.