Great Wall R-1020EX Explosion-Proof Rotary Evaporator

Overview

The Great Wall R-1020EX Explosion-Proof Rotary Evaporator is an industrial-grade vacuum distillation system engineered for safe, high-capacity solvent removal and compound purification in hazardous environments. It operates on the principle of reduced-pressure evaporation: rotation increases the surface area of the sample film while controlled bath heating accelerates volatilization, and a dual-stage condensation system ensures efficient vapor recovery. Designed in strict compliance with IEC 60079-0 and GB 3836.1–2010 standards for explosion-proof electrical equipment, the R-1020EX integrates a certified Class II, Division 1, Group IIB T4 explosion-proof control cabinet — enabling continuous operation in atmospheres containing flammable vapors such as ethanol, acetone, ether, or hydrocarbon solvents. Its 20 L rotary flask (Φ125 mm standard taper) and 10 L collection flask support batch-scale processing typical of pilot plant synthesis, pharmaceutical intermediate isolation, and fine chemical R&D workflows where thermal sensitivity, scalability, and intrinsic safety are co-primary requirements.

Key Features

• Explosion-proof architecture: Fully isolated electrical cabinet rated IP54 with intrinsically safe temperature class T4 (surface temp ≤135°C), certified for Zone 1/21 gas/dust environments.
• Dual-stage vertical condenser: Triple-reflux design with main (0.948 m²) and auxiliary (0.458 m²) stainless steel condensing surfaces — optimized for high-boiling-point solvents and low-vacuum efficiency down to 100 Pa when paired with compatible vacuum pumps.
• Precision thermal management: SUS304 water/oil bath (Φ450 × 260 mm) with 6 kW heating capacity, digitally controlled from ambient +5°C to 95°C at ±1.5°C accuracy; integrated overtemperature cut-off prevents thermal runaway.
• Robust mechanical drive: 180 W variable-frequency motor delivering smooth, pulse-free rotation across 20–130 rpm; torque-stable even under viscous load or partial vacuum conditions.
• Enhanced sealing integrity: Dual-material static seal combining PTFE gasket and fluorinated rubber O-ring at all critical vacuum interfaces — validated for ≤2 kPa/h pressure rise rate per ISO 2787.
• Operator-centric ergonomics: Manual lift mechanism with 190 mm stroke, lockable casters, and modular footprint permitting integration into fume hoods or dedicated explosion-proof enclosures.

Sample Compatibility & Compliance

The R-1020EX accommodates a broad spectrum of organic and aqueous solutions, including but not limited to alcohols, esters, ketones, chlorinated solvents, and heat-labile natural product extracts. Its large-diameter (Φ125 mm) ground-glass joint ensures minimal bumping during rapid evaporation of low-surface-tension liquids. All wetted parts — including rotary and collection flasks, condenser tubes, and discharge valve — are constructed from borosilicate glass (DIN 28720) or food-grade SUS304 stainless steel. The system conforms to ISO 9001 manufacturing quality protocols and supports GLP-compliant documentation through traceable calibration logs (temperature sensor, vacuum transducer). While not FDA 21 CFR Part 11–certified out-of-the-box, its analog control interface permits integration with external audit-trail-enabled SCADA systems for regulated environments.

Software & Data Management

The R-1020EX employs a microprocessor-based analog control panel with independent digital displays for bath temperature and rotational speed — intentionally omitting embedded software to maximize reliability and electromagnetic compatibility in explosive atmospheres. All setpoints and real-time readings are locally visible and manually adjustable without network connectivity. For laboratories requiring electronic data capture, optional analog output signals (4–20 mA for temperature; 0–10 V for speed) enable connection to PLCs or third-party DAQ systems compliant with ATEX/IECEx zone boundary protocols. No internal storage or firmware updates are implemented — eliminating cybersecurity risks and ensuring long-term validation stability.

Applications

• Pharmaceutical process development: Solvent exchange of active pharmaceutical ingredients (APIs) under inert, spark-free conditions.
• Agrochemical formulation: Concentration of pesticide emulsifiable concentrates (ECs) and suspension concentrates (SCs) without thermal degradation.
• Essential oil isolation: Gentle removal of carrier solvents (e.g., hexane) from botanical extracts at sub-atmospheric pressures.
• Polymer synthesis: Precipitation and recovery of reaction media following Ziegler–Natta or RAFT polymerizations.
• Environmental analysis labs: Pre-concentration of EPA Method 502/524 extracts prior to GC-MS analysis.
• Academic research: Teaching unit for vacuum thermodynamics and mass-transfer kinetics in chemical engineering curricula.

FAQ

What explosion-proof certification does the R-1020EX hold?
It meets GB 3836.1–2010 (Chinese national standard equivalent to IEC 60079-0) for Class II, Division 1, Group IIB T4 equipment — suitable for use in areas where explosive gas mixtures may occur during normal operation.
Can the system achieve vacuum levels below 100 Pa?
Yes — when coupled with a two-stage oil-sealed rotary vane pump or dry scroll vacuum pump capable of ultimate vacuum ≤10 Pa, the system’s leak-tight construction (validated by ≤2 kPa/h pressure rise test) enables stable operation at 50–100 Pa.
Is the condenser cooled by circulating water only, or can it accommodate glycol chillers?
The dual condenser accepts standard 10–15 °C coolant supplied via external circulation — compatible with both water-cooled chillers and ethylene glycol/water mixtures for sub-zero condensation temperatures.
Does the unit include vacuum monitoring instrumentation?
A calibrated analog vacuum gauge is factory-installed; digital vacuum transducers (0–100 kPa range, 0.5% FS accuracy) are available as optional accessories with 4–20 mA output.
What maintenance intervals are recommended for the explosion-proof cabinet?
Per GB 3836.16, visual inspection of seals and grounding continuity must be performed before each shift; full preventive maintenance (including terminal torque verification and insulation resistance testing ≥1 MΩ) is required every 12 months by qualified personnel.