TSIX heat pump dryer or hot air drying oven have been approved by many Certificates. Our food dehydrated machines are manufactured accord with the regulation of these certificates. The components we use are Emerson, Schneider and Sanhua's copper components. The raw materials are tested and conform to RoHS or friendly to the enviroment. Each process of the heat pump dryer is equipped with production techinical document and our staff will install as the document. Before sell our machines to the market, our machines will be tested for 3 to 4 times by our QC Depart including Welding Leakage Testing,Electrical Components Connection Testing, Capacity Testing or Drying Performance Testing.