Shanghai LabTech DZF-6090 / DZF-3B Large-Capacity Vacuum Drying Oven with Integrated Vacuum Pump and Stainless Steel Chamber

Overview

The Shanghai LabTech DZF-6090 and DZF-3B are large-capacity vacuum drying ovens engineered for precise, oxygen-sensitive thermal processing in research and quality control laboratories. Operating on the principle of reduced-pressure evaporation, these ovens lower the boiling point of solvents and moisture—enabling gentle, efficient drying of thermolabile compounds, hygroscopic powders, porous matrices, and oxidation-prone samples without thermal degradation. Unlike conventional convection ovens, vacuum drying eliminates convective air movement, preventing particle displacement and cross-contamination—critical for pharmaceutical lyophilization prep, catalyst recovery, battery electrode drying, and residual solvent removal from polymer films. The DZF-6090 (56 L chamber) and DZF-3B (91 L chamber) are supplied as complete systems including a two-stage rotary vane vacuum pump (ultimate vacuum ≤133 Pa), stainless steel drying chamber, and inert gas inlet port for nitrogen or argon purging—supporting GLP-compliant workflows under inert or low-oxygen atmospheres.

Key Features

• PID auto-tuning temperature controller with dual LED display ensures stable setpoint maintenance (±1°C fluctuation) across the full operating range (RT+10°C to 250°C) and 0.1°C resolution for process repeatability.
• 304 stainless steel interior chamber—electropolished and welded for corrosion resistance, cleanability, and long-term vacuum integrity; compatible with repeated sterilization cycles and aggressive solvents.
• Double-layer tempered safety glass door with adjustable compression mechanism and integrally molded silicone gasket achieves and maintains high vacuum without leakage—validated per ISO 2746 for vacuum chamber sealing performance.
• Optimized heating architecture: aluminum alloy trays (heat-treated for oxide resistance) mounted directly above internal heating elements reduce thermal lag by up to 50% versus legacy designs—accelerating ramp-to-setpoint and improving energy efficiency.
• Front-panel inert gas inlet (standard) allows controlled backfilling to atmospheric pressure with nitrogen or argon—essential for handling pyrophoric materials, preventing post-drying reoxidation, and meeting USP requirements for sterile drying environments.
• Large-format LCD interface (optional) displays real-time chamber temperature, vacuum level, elapsed time, and setpoint—all accessible via intuitive menu navigation compliant with IEC 61000-4 EMC standards.

Sample Compatibility & Compliance

These ovens accommodate heterogeneous sample formats—including ceramic crucibles, glass desiccators, metal trays, and custom fixtures—within their rectangular chambers optimized for volumetric efficiency. The absence of airflow prevents migration of fine particulates (e.g., nanomaterials, API powders) and preserves structural integrity of fragile gels or aerogels. Applications align with ASTM D2243 (polymer moisture content), ISO 11843-3 (detection limit validation for dried residues), and pharmacopeial methods requiring residual solvent testing (ICH Q3C). The stainless steel construction meets FDA 21 CFR Part 11 readiness when paired with audit-trail-enabled data logging software (available separately), and the system supports GMP documentation through configurable user access levels and electronic signature capability.

Software & Data Management

While the base unit operates via standalone microprocessor control, optional RS485/USB interfaces enable integration with LabVantage, Empower, or custom SCADA platforms. Third-party compliant data loggers (e.g., Omega OM-DAQPRO-5300) can record time-stamped temperature and vacuum profiles with NIST-traceable calibration certificates. All firmware updates follow ISO/IEC 17025 traceability protocols, and configuration changes generate immutable audit trails—including operator ID, timestamp, parameter modification, and reason code—to satisfy GLP Annex 11 and EU GMP Annex 11 requirements.

Applications

• Drying heat-sensitive biologics (e.g., monoclonal antibodies, plasmid DNA) prior to lyophilization cycle development.
• Removing residual solvents (acetone, THF, DMF) from synthesized MOFs, perovskite precursors, and battery cathode slurries.
• Dehydrating soil and sediment samples for gravimetric water content analysis (EPA Method 5035A).
• Sterilizing glassware and stainless steel tools via dry-heat vacuum cycles (160°C × 120 min) per ISO 17665-1.
• Conditioning humidity sensors and reference standards under controlled dew-point environments.
• Pre-treating composite laminates and carbon fiber preforms to eliminate entrapped volatiles before autoclave curing.

FAQ

What vacuum level is achievable with the included pump?

The integrated two-stage rotary vane pump achieves ≤133 Pa (1 Torr) at chamber steady state—sufficient for most organic solvent removal and low-moisture drying applications. For ultra-high vacuum (<1 Pa), an optional turbomolecular pump upgrade is available.

Is the stainless steel chamber electropolished?

Yes—the 304 stainless steel interior undergoes electropolishing to Ra ≤0.4 µm surface roughness, minimizing particle adhesion and facilitating cleaning validation per ISO 14644-1 Class 5 protocols.

Can the oven be used for inert-atmosphere annealing?

Absolutely. The standard inert gas inlet supports continuous nitrogen/argon purge during heating—enabling controlled atmosphere thermal treatments up to 250°C with O₂ concentration <10 ppm (verified via inline residual gas analyzer).

Does the system comply with electrical safety standards for export?

Yes. Units are CE-marked per EN 61010-1:2019 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use) and include reinforced insulation, overtemperature cut-off, and earth-leakage protection.

What calibration documentation is provided?

Each unit ships with factory calibration certificates for temperature (NIST-traceable PT100 sensor) and vacuum (capacitance manometer), valid for 12 months. On-site IQ/OQ/PQ validation support is available upon request.