The grille of the rotary drum screens is divided into two parts, the upper part is steel plate and the lower part is grille. Generally, the material of grille is related to water quality. Carbon steel can be used in rivers and rainwater pumping stations. In sewage pumping stations and intake pumping houses of sewage plants, stainless steel should be used in underwater parts to increase service life. 

The installation of rotary drum screens can be divided into whole installation and separate installation. Generally, the installation angle is 70 ~90. Most of the decontaminators are mainly used for inclined installation, while a few are used for vertical installation. If the pumping station occupies a small area and the grille time is short, the vertical drum grille can be used to save land. 

The rotary drum screens can be set at the top of the ditch or pool. When the ditch is deep, some types of decontaminators can be set on the castor deck, and the dirt can be transported back to the top twice. But the position of the castor board should take into account the position of the high water level. Driven by the motor reducer, the rake gear chain moves repeatedly against the current direction, salvaging the floating scum on the water surface. When the rake gear chain runs to the upper part of the equipment, due to the direction of the groove wheel and the curved rail, the relative self-cleaning movement occurs between each group of rake teeth, and most solid materials fall by gravity. The other part relies on the reverse movement of the sweeper to clean up the debris adhering to the rake teeth.www.khnwatertreatment.com