features: The extraction tank can stand alone extraction, Parallel extraction, countercurrent extraction; short extraction time, high extraction efficiency, the use of solvent is a small amount of extract of high purity, the active ingredient content is large, in order to concentrate and recovery, save a lot of energy; Full-featured unit for testing, teaching and research in new drug development, process parameters of revisions,pilot batch production and refining of precious medicine needs of a variety of conditions. advantage: 1) Steam heated water through theplate heat exchanger on the unit to provide heat, steam utilization, and high heat quickly. Steam, electricity are the two ways to choose freedom. 2) The product has manual and automatic two kinds of features, which can be individually designed and manufactured according to user needs. Pneumatic slag door is safe and reliable, easy to operate.