Rotary evaporator VD series

thin-filmwiped filmprocess

WIPED FILM AND THIN FILM EVAPORATORS High evaporation rates within a single process path Wiped film and thin film evaporators consist of a cylindrical heating jacket and an inner rotating wiper system, distributing the product on the heating jacket as a thin and turbulent film. The turbulence in the wiped film increases the heat and mass transfer to achieve a high evaporation rate at short residence times, often within a single processing pass. The separated vapors are either condensed on an external condenser or further separated in a fractional column. Wiped film and thin film evaporation allow the handling of heat-sensitive, fouling and viscous products. Performance features • Capacity: 0,1 kg/h up to several t/h • Operating pressure: full vacuum to overpressure • Turn down ratio: 95 % and higher • Visosity: 75.000 mPas or more at operating temperature • Residence time: less than one minute • Treatment of fouling products possible • Combination for fractionation column: possible Typical Applications Processing of thermal sensitive or viscous products such as • BDO butanediol • Lecithin • Whey • Biopolymers • Used oil • Isocyanates TDI, HDI • Devolatilization of silicone oil Design features • Available scales: laboratory, pilot and industrial • Material of construction: glass, stainless steel, special alloys, glass lined • GMP and hygienic version: available • Shell and rotor: straight or tapered • Heat exchange surface: 0,04 m² - 103 m² • Various rotor types available