WZI型外加熱式真空蒸發器是一種在真空系統下操作的自然循環型蒸發器。
      WZI型有一效、二效、三效系列規格，另有Q型為強制外循環蒸發器。本品可廣泛用于醫藥、食品、化工、輕工等行業的水或有機溶媒溶液的蒸發濃縮。特別適用于熱敏性物料，（例如中藥生產的水、醇提取液、抗生素發酵液、牛奶、果汁等），在真空條件下進行低溫連續濃縮，可確保產品質量。
WZI type external heating vacuum evaporator is a kind of natural circulating evaporator operated under vacuum system.
WZI type includes single-effect, double-effect and three-effect series. In addition, there’s Q type compulsory external circulating evaporator. This product can be widely used for evaporation and concentration of water or organic solvent solution in medicine industry, food industry, chemical industry and light industry, etc. It is especially applicable for low-temperature concentration of heat-sensitive materials (such as water produced by traditional Chinese medicine, extracted liquid from alcohol, fermentation broth of antibiotics, milk, juice, etc). The product quality can be ensured.