Rotary Vacuum Film Evaporator, ‘Digital Cold Trap’

The GISCOM Rotary Vacuum Film Evaporator, Digital Cold Trap model, is a specialised solvent evaporation system designed for efficient concentration, purification, and recovery of very volatile solvents. The integrated cold trap condenser—suitable for cooling with dry ice or other solid refrigerants—significantly enhances solvent capture and prevents vapour loss during vacuum distillation. This configuration is ideal for freeze-drying support, handling thermally sensitive compounds, and maximising solvent recovery in demanding laboratory and industrial applications.

Key Features

• Advanced Cold Trap Condenser: High-efficiency condenser compatible with dry ice, enabling superior trapping of volatile vapours.
• Digital Temperature Control: A PID-controlled water/oil bath ensures precise, stable thermal conditions.
• Robust Borosilicate Glass 3.3 Construction: All wetted glass components provide exceptional chemical resistance and thermal stability.
• Continuous Sample Feeding: An Integrated feed tube allows the addition of solutions during operation without compromising the vacuum.
• Non-Sparking, Variable-Speed Motor: Safe rotation control for sensitive distillation workflows.
• High Recovery Efficiency: Minimises solvent loss, making it ideal for valuable and low-boiling-point solvents.
• Stable, Heavy-Duty Base Structure: Ensures vibration-free operation and long-term reliability.
• PTFE/Glass Contact Surfaces: Eliminates corrosion and cross-contamination risks.
• User-Friendly Assembly: Easy access to the condenser, receiving flask, and evaporating flask for quick setup and dismantling.

Material Specifications

• Material: Borosilicate Glass 3.3 (ISO 3585 compliant)
• Thermal Properties: High resistance to thermal shock, low thermal expansion coefficient. Suitable for both heating and cryogenic cooling
• Chemical Properties: Highly inert to acids, organic solvents, and most laboratory chemicals. Non-porous surfaces for contamination-free processing
• Mechanical Properties: Excellent strength under vacuum and rotation. Durable for long-term operation in research and industrial environments
• Standards & Compliance: Meets global laboratory quality and safety guidelines

Technical Specifications

• Evaporating Flask Capacity: 1 L, 2 L, 5 L
• Cold Trap Condenser Type: Vertical cold trap; dry ice compatible
• Drive System: Variable-speed, non-sparking motor
• Rotation Speed Range: Adjustable based on application
• Bath Type: Stainless steel water/oil bath with digital PID control
• Wetted Materials: Borosilicate Glass 3.3 & PTFE
• Vacuum Compatibility: Works with standard rotary vacuum pumps
• Calibration: Factory-calibrated digital controller for accurate heating

Handling & Precautions

• Always verify vacuum seals before operation.
• Use only recommended cooling agents (e.g., dry ice) inside the cold trap.
• Avoid sudden temperature changes—allow glassware to cool before washing.
• Clean with mild detergents; avoid abrasive scrubbing tools.
• Do not overfill the evaporating flask to prevent bumping.
• Ensure bath fluid levels remain consistent for uniform heating.
• Never apply direct flame or uncontrolled heat to glass components.
• Inspect glassware regularly for cracks or stress marks.
• Operate on a flat, stable surface to prevent vibration and breakage.

Applications

The Digital Cold Trap Rotary Vacuum Film Evaporator is particularly suited for:

• Concentration of volatile and low-boiling solvents
• Solvent recovery in analytical, chemical, and pharmaceutical workflows
• Freeze-drying support and pre-concentration
• Purification of thermally sensitive compounds
• Natural product extraction and essential oil research

Sample preparation in:

• Pharmaceutical R&D and QC/QA labs
• Chemical and petrochemical industries
• Biotechnology and life science research centres
• University and academic laboratories
• Food, fragrance & environmental testing labs

Its ability to trap highly volatile vapours makes it essential for precise, safe, and loss-free solvent handling.