Travelling band screen is mechanically cleaned fine screening equipment which is used mainly for preventing medium to fine-sized floating wastes from getting into the pumps which are located in the wet well/pump chamber of water and wastewater pumping station or to prevent finely sized floating wastes from travelling further into the water and wastewater treatment plants. The impurities or debris present in the water can be of several types ranging from shrimps, fish, jellyfish, man-made refuse, grass, seaweed, plastics, and others. They are highly suited for deep pits.
Travelling Band Screens are installed in a channel in which the water which needs to be cleared flows. The screen comprises a set of rectangular screen mesh panels which is carried by two endless chains. The panels can go up and down again between an upstream wall plate and a downstream partition with a central, outlet aperture set across the channel. The water enters through both sides of the upstream wall-plate, flows through the upstream face of the panels on each side where the debris was arrested. Through the back partition aperture, the water then flows out. The debris-laden panel then travels up above the deck level around the top and goes down again. One or two spray pipes with fantail jet nozzles are setting on the downstream side of the panels within the head structure of the screen, backwashes the panels, removes the debris that is projected into a collection trough. They then travel in a deck flume to the disposal system of the debris. The screens are then stopped normally and are periodically washed when they are obstructed by debris, Permanent rotation can be offered.