Equipment that ensure optimum belt cleaning and material flow control for conveyor installations handling bulk materials. The primery scrapers clean the conveyor belts at the pulley. Depending on the width of the belt and the consistency of the conveyed material, various combinations of scraper blades and blade-bases may be necessary to achieve optimal scraping results. Possible option is to extract the scraper segment latelally without anybody to having to enter the belt system. Thanks to the modular system the blades can be replaced fast and easy. The TWIST-SWING® feature allows the individual blades to adjust to the belt perfectly.