Gongyi Yuhua YRE-2050A (50 L) Explosion-Proof Rotary Evaporator

Overview

The Gongyi Yuhua YRE-2050A (50 L) Explosion-Proof Rotary Evaporator is an industrial-scale vacuum distillation system engineered for safe, efficient solvent removal, concentration, and recovery under reduced pressure. It operates on the principle of thin-film evaporation: a motor-driven rotating flask subjects liquid samples to centrifugal force while immersed in a precisely controlled water bath, forming a uniform film across the inner surface. Under vacuum (< 2000 Pa), the boiling point of solvents is significantly lowered—enabling gentle thermal processing ideal for heat-sensitive compounds such as pharmaceutical actives, natural extracts, polymer precursors, and volatile organic fractions in petrochemical or food-grade applications. The explosion-proof design complies with IEC 60079-0 general requirements for electrical equipment used in potentially explosive atmospheres (Zone 1/2), integrating intrinsically safe motor control circuitry, sealed junction boxes, and non-sparking components throughout the drive and power regulation modules.

Key Features

• EL-type high-integrity vacuum sealing system ensuring stable operation at < 2000 Pa, minimizing vapor backflow and maximizing process repeatability
• Dual-stage condensation architecture: primary vertical condenser + secondary auxiliary condenser—optimized for >95% solvent recovery efficiency across low- to medium-boiling-point solvents (e.g., ethanol, acetone, ethyl acetate, dichloromethane)
• Explosion-protected electrical subsystems including flameproof motor housing (Ex d IIB T4), certified speed controller, and isolated power supply unit meeting GB 3836.1–2010 and ATEX Directive 2014/34/EU alignment standards
• Ergonomic height-adjustable column with spring-loaded lift mechanism enabling rapid vertical positioning (±150 mm travel) without tools; tilt angle adjustable from 0° to 45° for optimal film formation and drainage
• Borosilicate glass 3.3 components (rotating flask, condensers, collection vessel) rated for continuous use up to 99 °C; all ground-glass joints precision-machined to ISO 3585 tolerances
• Integrated vacuum gauge with analog readout and fine-tuning valve—allowing real-time vacuum optimization for fractional distillation of multi-component mixtures
• Drainable 20 L collection flask with PTFE-coated stopcock and inline vacuum check valve—enabling continuous feed and solvent discharge without breaking vacuum
• Water bath with PID-controlled digital thermostat (±1 °C accuracy), 8 kW heating capacity, and corrosion-resistant stainless steel tank with overflow protection

Sample Compatibility & Compliance

The YRE-2050A accommodates viscous, foaming, and thermally labile samples across environmental testing (EPA Method 3510C), food safety analysis (AOAC 993.14), polymer synthesis (ASTM D1655), and active pharmaceutical ingredient (API) purification workflows. Its borosilicate glass train is compatible with common organic solvents (including chlorinated and ester-based media), aqueous buffers, and mild acidic/basic solutions. All wetted seals utilize FKM fluoroelastomer (Viton® equivalent), resistant to swelling and degradation under prolonged solvent exposure. The system supports GLP-compliant documentation when paired with external data loggers; its electrical architecture conforms to GB/T 14048.1–2012 (low-voltage switchgear) and meets EMC immunity requirements per GB/T 17626.2–2018 (ESD) and GB/T 17626.3–2016 (radiated RF fields).

Software & Data Management

While the YRE-2050A operates via analog front-panel controls (rotational speed dial, temperature setpoint knob, vacuum gauge), it is fully compatible with third-party process monitoring systems via optional 4–20 mA output interfaces for bath temperature and vacuum level. Users may integrate the unit into centralized laboratory automation platforms using standard Modbus RTU protocol (via RS-485 expansion module, sold separately). For audit-trail compliance in regulated environments, external USB data loggers can record time-stamped temperature, rotation speed, and vacuum values—supporting 21 CFR Part 11–aligned electronic records when paired with validated software (e.g., LabArchives, DeltaV, or custom SCADA).

Applications

• Concentration of large-volume botanical extracts (e.g., 50 L batches of ethanol-based tinctures) without thermal degradation
• Solvent recovery in pilot-scale chemical manufacturing—reducing VOC emissions and operational costs per kg of product
• Removal of residual THF or DMF from polymer reaction mixtures prior to precipitation or lyophilization
• Dehydration of heat-sensitive biologics intermediates under controlled vacuum and sub-boiling conditions
• Preparative isolation of flavor compounds from distillates in food R&D facilities
• Environmental sample preparation: concentration of PAHs, PCBs, or pesticides from aqueous extracts prior to GC-MS analysis

FAQ

What certifications does the YRE-2050A hold for explosion-proof operation?
The unit complies with Chinese national standard GB 3836.1–2010 (equivalent to IEC 60079-0) and carries the Ex d IIB T4 Gb marking for use in Zone 1 hazardous areas. Certification documentation is provided upon request.

Is the 50 L rotating flask interchangeable with other Gongyi Yuhua models?
Yes—the YRE-2050A uses standardized ISO 29/32 and ISO 45/50 ground-joint interfaces consistent across the YRE series (1–50 L), enabling cross-platform flask compatibility when mechanical support and vacuum integrity are verified.

What maintenance intervals are recommended for fluoroelastomer seals?
Inspect seals every 200 operating hours; replace if cracking, hardening, or compression set exceeds 15%. Clean with isopropanol before re-lubrication using perfluoropolyether (PFPE)-based vacuum grease.

Can the water bath accommodate glycol-water mixtures for sub-ambient temperature control?
No—the bath is designed exclusively for heating applications up to 99 °C. For cooling, users must connect an external chiller to the condenser’s coolant ports (standard 12 mm OD tubing).

Does the system include vacuum pump and coolant circulation unit?
No—these are auxiliary components selected based on application-specific requirements (e.g., diaphragm vs. oil-sealed pumps; refrigerated vs. ambient chillers) and must be procured separately.