Continuous SS Thin Film Evaporator

Production-oriented pilot scale · 1.0–8.0 L/h continuous throughput · 3 L feed and receivers

Continuous thin-film evaporation under high vacuum for gentle, efficient separation of heat-sensitive, high-viscosity, crystallizing and fouling-prone liquids — from lab R&D to small-scale production.

The AV-B150S is a stainless steel wiped-film evaporator (thin-film evaporator) built for continuous liquid–liquid separation under high vacuum. A rotating PTFE wiper system spreads the feed into a thin, continuously renewed film on the heated inner wall, so evaporation is completed within seconds at a low distillation temperature — a decisive advantage for heat-sensitive products.

The complete system integrates the heating jacket, evaporator column, wiper rotor, condenser, cold trap and vacuum circuit with automatic feeding and collecting, offering a plug-and-play thin film distillation unit for higher-throughput pilot work and small-batch production — the larger-capacity member of the AV-B series.

02 KEY BENEFITS

03 DESIGN & STRUCTURE

• The AV-B150S is engineered around the evaporator column with every element working as one system: a 304/316L stainless steel body, PTFE (polytetrafluoroethylene) seals that keep the chamber airtight under high vacuum, a scraper-type short-path distillation rotor, and an automatic feed/collect circuit — giving stable, high-efficiency separation performance.
• Fig. 1 — Internal structure of the AV-B150S wiped-film evaporator (numbered parts are explained below).

04 WORKING PRINCIPLE

• Fig. 2 — Thin-film evaporation process flow of the AV-B150S system (continuous mode).
• 1. Feed enters under vacuum — Under high vacuum, the feed liquid is drawn into the top of the evaporator from the 3 L feed bottle.
• 2. Thin film evaporation — Rotating PTFE wipers spread the liquid into a thin film over the heated wall (up to 200 °C); the light, low-boiling fraction evaporates within seconds.
• 3. Vapor → condenser — The vaporized light fraction flows to the condenser and cold trap, then collects as distillate in the light-fraction receiver (3 L).
• 4. Residue → receiver — The un-evaporated heavy fraction is wiped downward and drained into the heavy-fraction receiver (3 L). The cycle runs continuously.
• Why it matters: the thin, fast-renewing film together with high vacuum keeps the product at temperature for only seconds, which is why wiped-film evaporators are preferred for heat-sensitive, viscous and fouling-prone feeds.

05 TECHNICAL SPECIFICATIONS

06 APPLICATIONS

• Thin-film evaporation suits liquid mixtures that are difficult for ordinary distillation — high-viscosity, easy-crystallizing, easy-fouling, particle-containing (suspended solids) and heat-sensitive feeds — and is widely used for pre-treatment and fine processing in the following industries.
• Application scenes of the AV-B150S wiped-film evaporator: fine chemicals, pharmaceuticals, nutraceuticals, cosmetics, perfumery & flavor, and botanical extracts.

07 SCALING, CUSTOMIZATION & SERVICE

• The AV-B150S is part of a complete wiped-film evaporator range covering lab, pilot and production scales:
• • Wide model range — from bench-top units up to larger evaporators for pilot and scale production; suitable for R&D, small-batch and continuous duty.
• • Customizable — jacketed vessels, connections/ports, control options and accessories can be tailored to the process; one-stop complete systems available.
• • Ready to run — the evaporator works with vacuum pump and cooling unit to form a plug-and-play automated distillation station.
• • Manufacturer support — technical consultation, commissioning guidance and after-sales service available from the factory.