SDAP Portable Drying System provides users the ability to dry and convey resins in a single, portable, compact unit. Available in one of three configurations, operators can automatically convey material to the drying hopper, to the process machine, or both the hopper and the process machine. All of this is possible by integrating the conveying controls with the dryer which means that no additions or expansions to existing conveying systems are required when adding the SDAP. In addition, when equipped with an optional RPV proportioning valve, two materials (typically virgin and regrind) can be automatically be conveyed to the drying hopper, eliminating the need to mix the two prior to drying.