Great Wall R-3001 Benchtop Rotary Evaporator

Overview

The Great Wall R-3001 Benchtop Rotary Evaporator is an engineered solution for efficient solvent removal, concentration, and purification of heat-sensitive compounds under reduced pressure. Based on the fundamental principle of rotary evaporation—where simultaneous rotation, heating, and vacuum application lower the boiling point of solvents—the R-3001 delivers consistent performance in academic research labs, quality control environments, and pilot-scale synthesis workflows. Its modular architecture separates the heating bath from the main evaporator unit, enabling flexible system integration with external vacuum pumps, chiller units, and vacuum controllers. Designed and manufactured in Henan, China, the instrument complies with CE safety directives as verified by TÜV, ensuring conformance with essential health, safety, and electromagnetic compatibility requirements for use in EU-regulated laboratories.

Key Features

• Dual-material vacuum sealing: PTFE (modified) and fluoroelastomer dual-seal ring system ensures long-term integrity under continuous vacuum operation, with measured leakage rate ≤0.33 kPa/min—critical for maintaining stable vacuum levels during extended distillations.
• Precision speed control: Stepless DC motor drive enables smooth, noise-free rotation across a wide range of 10–280 rpm, optimized for both low-viscosity solvents and high-boiling-point mixtures.
• Electric vertical lift mechanism: 150 mm stroke allows precise positioning of the rotating flask into and out of the heating bath, reducing manual handling and improving reproducibility across sequential runs.
• High-efficiency condensation: Dual-return coil condenser with 0.126 m² effective cooling surface area maximizes condensate recovery, minimizing solvent loss and enhancing process yield.
• Modular thermal management: Detachable water/oil bath (temperature range: ambient +5°C to 95°C) supports independent calibration and maintenance; compatible with external recirculating chillers for sub-ambient condensation.
• Robust mechanical design: Synchronous belt transmission eliminates gear backlash and vibration, contributing to operational stability and extended service life.

Sample Compatibility & Compliance

The R-3001 accommodates standard 500 mL and 1000 mL round-bottom flasks, paired with a 1000 mL collection flask—suitable for routine organic extractions, natural product isolation, polymer solvent recovery, and post-reaction workup. Its construction materials—including borosilicate glass joints, PTFE-coated seals, and corrosion-resistant aluminum alloy housing—ensure compatibility with common laboratory solvents (e.g., acetone, ethanol, ethyl acetate, dichloromethane) and mild acidic/basic media. The unit meets CE marking requirements per Directive 2014/30/EU (EMC) and 2014/35/EU (LVD), and its electrical safety design aligns with IEC 61010-1 for laboratory equipment. While not certified to ISO/IEC 17025 or GLP-specific validation protocols out-of-the-box, the system supports documentation-ready operation when integrated with validated vacuum sensors, temperature loggers, and electronic lab notebooks.

Software & Data Management

The R-3001 operates via an embedded LCD interface providing real-time display of rotational speed and bath temperature. Though it does not feature onboard data logging or PC connectivity, its analog control architecture ensures deterministic response and immunity to software-related downtime—ideal for regulated environments where simplicity and reliability are prioritized over digital integration. Users may pair the unit with third-party vacuum controllers (e.g., those supporting RS-485 or 0–10 V analog output) to implement basic automation sequences. For laboratories requiring audit trails, the device can be incorporated into broader process documentation frameworks compliant with FDA 21 CFR Part 11 when used alongside validated external recording systems.

Applications

• Solvent removal following column chromatography or solid-phase extraction
• Concentration of dilute natural product extracts (e.g., plant alkaloids, essential oils)
• Recovery of volatile organic solvents in pharmaceutical intermediate synthesis
• Removal of residual THF, DMF, or DMSO from polymer solutions prior to characterization
• Low-temperature distillation of thermally labile compounds (e.g., prostaglandins, peptides)
• Teaching laboratory demonstrations of phase equilibria and vacuum distillation principles

FAQ

What is the maximum recommended vacuum level for optimal performance?
The R-3001 is designed for operation under typical rotary evaporation vacuum ranges of 10–100 mbar. Stable performance is achieved using a two-stage diaphragm or rotary vane vacuum pump capable of reaching ≤5 mbar ultimate vacuum.

Can the R-3001 be used with corrosive solvents such as concentrated HCl or bromine-containing compounds?
No. While PTFE and fluoroelastomer seals offer broad chemical resistance, prolonged exposure to strong oxidizers, halogens, or mineral acids may degrade seals and compromise vacuum integrity. Use only with solvents listed in ASTM D471 and ISO 1817 compatibility charts.

Is the heating bath interchangeable between different Great Wall models?
The R-3001 uses a proprietary bath interface; cross-compatibility with other Great Wall rotary evaporator models (e.g., R-1001, R-2001) is not guaranteed without mechanical and thermal interface verification.

Does the unit include a vacuum controller or pressure sensor?
No. Vacuum regulation requires an external controller or manual valve adjustment. Optional vacuum sensors (e.g., capacitance manometers) may be added via standard NPT or G1/4″ ports on compatible vacuum lines.