Double Conical Revolving Vacuum Dryer,drying machine is suitable for vacuum mixing and drying of powder and granule raw materials of pharmaceutical industry,chemical industry,foodstuff industry etc, it is suitable for raw materials that have the following requirements: 1. the heat sensitive raw materials 2. raw materials that easy to oxidize and dangerous 3. raw materials that the solvent and toxic gases are needed to recover 4. raw materials that have special requirement for crystal shape 5. raw materials that have special requirement for the content of residual volatile. Description SZG Series Double Taper Vacuum Drier is a new generation drying device deceloped by our factory on the basis of combining the technology of same products.It has two coonnecting ways,i.e. pulley or chain.Therefore it is stafts reailze good concentricity.Heat medium and vacuum system all adapt reliable machinery seal or rotating joint made from USA.On the basis,we also developed SZG-A.It can carry out stepless speed change and conastant temperature control.Applications the double conical revolving vacuum dryer is suitable for the raw materials that need to concentrate,mix and dry at low temperature(for example,biochemistry products in chemical,pharmceutical and foodstuff industries. Particularly it is suitable for the raw materials that are easy to oxidize,volatilize and have strong heat sensitive and toxity and not permitted to destroy its crystal in drying.