- Operating principle of this type of conveyors is based on transferring suspended materials by chains and trolleys moving on a NPI profile by the help of a drive unit.WEBB type conveyor chains are made of nodular cast iron or forged steel and subjected to heat treatment afterwards.Special roller bearings used on trolleys are capable of operating at 200 centigrade. Greasers placed on trolley bodies provide lubrication for the system.
The drive system can be built based on either the caterpillar system or the gearwheel system, with safety switches and moving trolleys.
Conveyor speed can be easily adjusted by use of a frequency controller. Chain tensioning system consists skids and springs. Rollers and support wheels are used for band turns.