Usage & Features The STG-U Hopper dryer(pet dehumidifier)is a kind of advanced technology, reliable quality and high characteristics dehumidifier for drying raw material. 1.It can save energy by 27-65% 2.It can avoid a second wet of granulated plastics after drying when directly linking the material inlet of the moding machine; 3.Great in dr ying ability,and it can increase projecting speed rate; 4.The quality oh end products can be improved.