HUXI HR-21M Manual-Lift Rotary Evaporator

Overview

The HUXI HR-21M Manual-Lift Rotary Evaporator is an engineered solution for efficient solvent removal under reduced pressure in research and quality control laboratories. Based on the fundamental principle of vacuum-assisted rotary distillation, it enables continuous evaporation of volatile solvents from heat-sensitive samples while maintaining thermal stability and process reproducibility. The system rotates the evaporation flask at controlled speeds to increase surface area and promote uniform thin-film formation, thereby enhancing mass transfer and evaporation kinetics. Designed for routine purification workflows—including post-extraction concentration, chromatographic fraction recovery, and synthetic reaction workup—the HR-21M delivers consistent performance across batch sizes ranging from milliliters to hundreds of milliliters. Its manually actuated vertical lift mechanism provides precise, backlash-free positioning of the evaporation flask relative to the condenser, ensuring optimal alignment and minimizing vapor path resistance without reliance on complex electromechanical actuators.

Key Features

• Manual lift system with ergonomic lever operation—enables single-hand adjustment of flask height for rapid setup and safe flask removal under vacuum.
• LCD controller with intuitive menu-driven interface and rotary encoder for simultaneous display and setting of rotation speed, bath temperature, and timer.
• PID temperature control algorithm ensures stable thermal regulation within ±0.5°C accuracy across both water and optional oil bath configurations.
• Inclined double-layer coiled condenser with 0.15 m² effective cooling surface area—optimized for high-efficiency condensation and maximum solvent recovery up to 22 mL/min under standard operating conditions.
• Dual-mode heating system: externally mounted water or oil bath heater (oil bath optional), facilitating easy cleaning and maintenance of the heating vessel.
• High-performance sealing assembly featuring PTFE gaskets rated for continuous operation up to 180°C—resistant to acids, bases, and organic solvents; service life exceeds that of conventional elastomeric seals by ≥100%.
• Thermally insulated bath housing with low-surface-temperature design (<45°C at ambient 25°C) minimizes burn risk during routine handling.

Sample Compatibility & Compliance

The HR-21M accommodates standard ground-glass jointed glassware (e.g., 24/29, 29/32) and supports flasks with capacities up to 2 L (with appropriate support). Its PTFE-sealed joints and fluoropolymer-coated bath interior ensure compatibility with acidic, basic, and halogenated solvents—including chloroform, dichloromethane, ethyl acetate, methanol, and acetone—without degradation or leaching. While not certified to ISO/IEC 17025 or GLP as a standalone instrument, the device’s repeatable temperature and rotational control, combined with its documented fault logging and thermal safety cutoffs (including dry-run protection and overtemperature shutdown at preset limits), support compliance with internal SOPs aligned with FDA 21 CFR Part 11 data integrity expectations when used with validated procedures and audit-trail-enabled lab notebooks.

Software & Data Management

The HR-21M operates via embedded firmware with no external PC dependency. All operational parameters—including setpoints, real-time values, and error codes—are displayed and stored locally on the LCD module. The controller logs critical events (e.g., overtemperature alerts, power interruptions) with timestamped status flags visible during startup diagnostics. Though lacking network connectivity or export functionality, the unit’s deterministic behavior, non-volatile parameter memory, and traceable fault reporting enable integration into paper-based or ELN-managed workflows where manual entry of run conditions and outcomes is standard practice. For labs requiring electronic records, pairing with external data loggers or time-stamped video documentation satisfies ALCOA+ principles for attributable, legible, contemporaneous, original, and accurate data capture.

Applications

• Concentration of natural product extracts following liquid–liquid or solid-phase extraction.
• Removal of residual solvents from synthesized compounds prior to crystallization or analytical characterization (e.g., NMR, HPLC).
• Recovery of eluents in preparative chromatography (e.g., flash, MPLC) to reduce solvent consumption and waste disposal costs.
• Dehydration of moisture-sensitive intermediates under mild thermal conditions.
• Parallel evaporation support in method development studies where precise thermal ramping and rotational consistency are required across replicates.

FAQ

What is the maximum recommended flask size for the HR-21M?

Standard configuration supports up to 2 L evaporation flasks with proper mechanical stabilization; optimal performance is achieved with 500 mL–1 L vessels.
Is the oil bath included or optional?

The oil bath heating module is optional and must be ordered separately; the base unit includes only the water bath assembly and universal heater mount.
Does the unit comply with CE or UL safety standards?

The HR-21M meets GB/T 12805–2011 (Chinese national standard for rotary evaporators) and incorporates electrical safety features equivalent to IEC 61010-1:2010 Class II requirements; formal CE/UL certification is not held for export markets.
Can the condenser angle be adjusted during operation?

Yes—the condenser mounting bracket allows fine-tuning of inclination while the system is under vacuum, enabling optimization of condensate flow and minimizing backstreaming risk.
What maintenance intervals are recommended for the PTFE seals?

Under normal use with compatible solvents, PTFE gaskets require inspection every 6 months and replacement only upon visible compression set or leakage—typically exceeding 12 months of continuous service.