Inquiry about flexible screw conveyor

Hi
This is Hamid from Nutra Foods , New Zealand, I'm inquiring about a flexible screw conveyer for our production machines,  we intend to use portable material handling for different production machines. Material displacement for each machine will not be exceeded than 5 meters.
As we are very concerned about healthy code and regulations for food production, we look for a device which its degradation or wear and tear situation make no residual on our dry foods, especially with rotational parts
so please send your technical proposal for a flexible screw conveyer alongside with price list for different options and systems as well as information on the material life cycle and its properties in wearing and degradation for minimal residual during its operational life cycle, a possible certificate for parts-machines  and cleaning procedure for machines

best regards