The client had a need to replace a flap type diverter valve which had been in service for a considerable period of time. The existing diverter valve had reached the end of its service life and was difficult to clean and maintain due to its design. The new diverter design had to cope with a variety of sticky and abrasive feed material, with easy access for cleaning and maintainability, whilst being fast acting to allow reject material from a metal detector to be diverted out of the production stream.