Great Wall R-2020EX Explosion-Proof Large-Capacity Rotary Evaporator

Overview

The Great Wall R-2020EX Explosion-Proof Large-Capacity Rotary Evaporator is an engineered solution for safe, scalable solvent removal and concentration in pilot-scale laboratory environments. Designed specifically for hazardous or regulated process areas—including pharmaceutical intermediate synthesis, fine chemical production, and active pharmaceutical ingredient (API) purification—the system operates on the principle of reduced-pressure distillation: rotation increases surface area and promotes uniform thin-film formation on the inner wall of the evaporating flask, while controlled bath heating and vacuum facilitate efficient, low-temperature solvent evaporation. Its certified Ex db IIB T4 Gb explosion protection rating ensures compliance with IEC 60079-1 and GB 3836.1–2010 standards for use in Zone 1 and Zone 2 explosive gas atmospheres. All critical components—including the DC motor drive, heating bath controller, and electrical control cabinet—are intrinsically compatible with hazardous location requirements, eliminating ignition risks during operation with flammable solvents such as acetone, ethyl acetate, or ethanol.

Key Features

• Explosion-proof certified architecture: Motor, heating unit, and control panel conform to Ex db IIB T4 Gb classification per IEC 60079-1, enabling safe deployment in classified chemical processing zones.
• High-integrity vacuum sealing: Optimized PTFE-sealed joints and precision-ground glass flanges achieve a system leakage rate ≤0.03 kPa/min—no vacuum grease required—ensuring stable vacuum maintenance over extended runs.
• Automated collection valve system: Enables uninterrupted distillation during flask exchange in single-bottle configurations, minimizing process interruption and operator exposure.
• PTFE-coated discharge valve: Chemically inert, leak-tight flow control for residue handling and batch transfer without cross-contamination.
• Rapid ISO-KF modular assembly: Borosilicate 3.3 glass components (20 L rotating flask, 10 L collection flask) connect via standardized φ125 and 60# flanges, reducing setup time and improving repeatability.
• Intelligent temperature regulation: PT100 three-wire sensor feedback loop delivers ±1.5 °C stability across the 5–95 °C operating range, with digital LCD display and RS485 Modbus RTU interface for PLC integration and remote monitoring.
• Motorized vertical lift mechanism: Precision linear actuator enables reproducible height adjustment for flask immersion depth control and safe flask detachment under load.

Sample Compatibility & Compliance

The R-2020EX accommodates thermally sensitive and high-boiling-point compounds typical in biopharmaceutical downstream processing (e.g., buffer exchange, extract concentration), agrochemical formulation, and food-grade essential oil isolation. All wetted parts—including rotating flask, condenser, collection vessel, and discharge valve—are constructed from DIN 3.3 borosilicate glass and virgin PTFE, ensuring compatibility with organic solvents, mild acids, and alkaline solutions. The stainless steel bath (06Cr19Ni10) resists corrosion from water-glycol mixtures and common heat-transfer media. The system meets CE marking requirements for machinery safety (2006/42/EC) and electromagnetic compatibility (2014/30/EU). While not FDA 21 CFR Part 11–validated out-of-the-box, its Modbus-enabled architecture supports integration into validated environments with audit-trail-capable SCADA systems compliant with GMP Annex 11 and ISO/IEC 17025 documentation protocols.

Software & Data Management

The R-2020EX features embedded firmware with dual-channel digital display (rotation speed and bath temperature), non-volatile parameter storage, and real-time error logging. Via its RS485 port and standard Modbus RTU protocol, the unit interfaces directly with industrial HMIs, LabVIEW-based data acquisition platforms, or enterprise MES systems. Users may configure setpoint ramps, dwell times, and interlock conditions (e.g., vacuum threshold lockout, overtemperature shutdown) through external controllers. Optional software packages provide CSV export of time-stamped operational logs—including rpm, temperature, vacuum level, and runtime—for traceability in GLP-compliant workflows. No proprietary cloud service or vendor-specific driver is required.

Applications

• Pilot-scale concentration of fermentation broths and protein solutions under gentle thermal conditions.
• Removal of residual solvents from synthetic reaction mixtures prior to crystallization or lyophilization.
• Recovery and recycling of high-purity solvents (e.g., THF, toluene, dichloromethane) in multi-step API manufacturing.
• Standardized evaporation of botanical extracts for nutraceutical QC testing per USP and AOAC guidelines.
• Distillation of heat-labile natural flavors and fragrances where conventional boiling would cause degradation.

FAQ

What explosion protection standard does the R-2020EX meet?
It complies with IEC 60079-1 (flameproof enclosure “d” type) and carries the Ex db IIB T4 Gb marking, suitable for Group IIB gases (e.g., acetone, propane) with maximum surface temperature ≤135 °C.

Can the system operate continuously for >8 hours?
Yes—designed for sustained pilot operation, its 4500 W total power budget, IP20-rated electronics, and forced-air-cooled motor support unattended 24/7 operation when integrated with external vacuum and cooling utilities.

Is the glassware interchangeable with other Great Wall models?
The ISO-KF φ125 and 60# flange dimensions conform to DIN 28403, enabling mechanical compatibility with other Great Wall rotary evaporators using the same standard; however, thermal and vacuum performance must be verified independently per configuration.

Does the unit include vacuum or cooling accessories?
No—vacuum pumps, recirculating chillers, and cold traps are sold separately and must be selected based on solvent vapor pressure, condensation load, and required ultimate vacuum (typically ≤10 mbar for optimal performance).

What maintenance intervals are recommended?
Bath fluid replacement every 6 months (or per usage intensity), PTFE valve inspection quarterly, and annual calibration verification of PT100 sensor and tachometer output against NIST-traceable references.