Glass Wiped Film Evaporator

The AV-B150 is a single-stage glass thin-film (wiped-film) evaporator system built for laboratory pilot-scale purification and distillation of heat-sensitive, high-boiling-point, high-viscosity and easily oxidized materials. Its borosilicate-glass jacketed evaporation column features a 150 mm inner diameter and 0.25 m² evaporation area — the largest bench-top format in the AV-B glass series. A PTFE / SS316L wiper assembly driven by a 240 W motor (up to 450 rpm) spreads the feed into a thin film on the heated inner wall, while a 0.4 m² internal condenser plus cold well, external condenser and cooling unit ensure efficient condensation and high recovery of volatile fractions. The system operates under deep vacuum (standard <10 Pa; optional molecular or diffusion pump achieves ~0.1 Pa), enabling distillation far below normal boiling points, with a heating range from room temperature to 200 °C. Standard 3 L feed volume and 3 L light- and heavy-fraction receivers (all customizable), plus a flexible throughput of 1.0–8.0 L/h, make the AV-B150 ideal for pilot trials, process scale-up studies, and small-batch production across fine chemicals, pharmaceuticals, essential oils, food, cosmetics, and environmental applications. CE- and ISO-certified, with 220 V / 110 V compatibility.

Key Features & Advantages

• Operates well below material boiling points with very short residence time — ideal for high-boiling, heat-sensitive and easily oxidized compounds.
• Effectively removes organic solvents and odorous substances; excellent for de-solventizing extraction liquors.
• Selective evaporation of target products while removing impurities; multi-stage separation can isolate two or more components simultaneously.
• Ultra-high vacuum capability — standard <10 Pa (optional molecular or diffusion pump reaches ~0.1 Pa), preventing thermal degradation and oxidation.
• Thin liquid film (<0.5 mm) delivers high heat-transfer efficiency and rapid evaporation rates.
• Superior separation degree — separates substances that are difficult to resolve by conventional distillation.
• No boiling or foaming — free-surface evaporation under low pressure without dissolved air, avoiding entrainment and splashing.
• Multiple column sizes available from lab pilot to production scale; larger evaporation areas can be customized on request.
• Physical separation — non-toxic, harmless, pollution-free, and residue-free, yielding pure and safe products.
• PTFE and SS316L wiper system provides excellent corrosion resistance for aggressive solvents and acids.
• Optional feed-tank pre-heating with adjustable setpoint for improved feed conditioning and throughput stability.
• All glass joints sealed with fluoro-rubber gaskets (upgradable to PTFE) for reliable vacuum integrity and chemical compatibility.

Working Principle

Thin-film (wiped-film) evaporation separates liquid mixtures by exposing the feed to a heated surface under high vacuum. Feed is introduced into the top of the vertical glass evaporation column and spread into a very thin film (<0.5 mm) on the heated inner wall by a rapidly rotating wiper assembly. Because the system operates under deep vacuum, the volatile components evaporate at temperatures far below their normal boiling points, even for high-boiling and heat-sensitive materials. The vapor travels a short distance to the internal condenser and cold well, where it is chilled by the cooling unit and condensed into the light-fraction receiver. Non-volatile residues flow down the column wall and are discharged from the bottom into the heavy-fraction receiver or removed by an optional gear pump. The entire process typically takes only seconds, minimizing thermal exposure and preserving product integrity. Optional molecular or diffusion pumps can reduce the operating pressure to ~0.1 Pa for even gentler separation.

Working principle of the AV-B150 thin-film evaporator

Technical Specifications

Applications

• The AV-B150 pilot-scale thin-film evaporator is the equipment of choice wherever gentle, efficient concentration, purification, and molecular distillation are needed:
• Fine Chemicals — purification of aromatic oils, polymer intermediates, and lanolin extraction.
• Pharmaceuticals — extraction of natural vitamins A and E; production of amino-acid and glucose derivatives; high-vacuum purification of AP Is and cannabinoids at pilot scale.
• Food Industry — refining of fish oil, deacidification of fats and oils, purification of higher alcohols, and separation of mixed oils.
• Essential Oils & Fragrances — gentle concentration and fractionation of botanical extracts and perfume materials without thermal damage.
• Petrochemicals — separation and purification of petroleum fractions and specialty intermediates.
• Daily Chemicals & Environmental Protection — solvent recovery from waste streams and green-chemistry recycling processes.
• For more information, custom configurations, or a quotation, please contact our sales team. We offer turn-key solutions including vacuum pumps, heating/cooling circulators, feed systems, and full automation packages.