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


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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

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VTA − plant design at its best

VTA delivers package units in laboratory, pilot and industrial scale. Package units are skid mounted, pre-assembled systems for wiped film
and short path distillation, rectification and thin film drying.
All core components, like evaporators, condensers, vessels and piping, are manufactured in modern manufacturing facilities by highly qualified
workers either by VTA or within the STREICHER group.
All engineering services are performed entirely inhouse at VTA. By minimizing the interfaces, a smooth project execution is ensured.

Test Center

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Contract Manufacturing

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