Yoyi DZF-6500 Large Vertical Vacuum Drying Oven

Overview

The Yoyi DZF-6500 is a large-capacity, vertically oriented vacuum drying oven engineered for precise, oxygen-free thermal processing of heat-sensitive, oxidation-prone, and compositionally complex samples. Operating on the principle of reduced-pressure evaporation—where lowering ambient pressure depresses the boiling point of solvents and moisture—the DZF-6500 enables gentle yet efficient dehydration, sterilization, and solvent removal without thermal degradation. Its 426 L internal chamber volume (630 × 810 × 845 mm) supports high-throughput batch processing in pharmaceutical R&D, polymer formulation, battery electrode drying, ceramic sintering pre-treatment, and analytical sample preparation. Designed for compliance-critical environments, the unit maintains stable vacuum integrity and temperature uniformity across the full operating range (RT+10°C to 250°C), with microprocessor-based PID control ensuring repeatability under GLP and GMP-aligned workflows.

Key Features

• Stainless steel (SUS304) interior chamber and reinforced cold-rolled steel exterior with electrostatic powder coating for corrosion resistance and structural rigidity.
• Double-layer tempered glass observation door with integrated silicone gasket—fully adjustable compression mechanism ensures long-term vacuum seal integrity at ≤133 Pa.
• Dedicated inert gas inlet port (optional) compatible with nitrogen or argon supply lines, enabling controlled atmosphere operation during heating cycles.
• Four fixed aluminum alloy shelving trays—surface-treated for high-temperature oxidation resistance and optimized thermal conductivity to minimize axial temperature gradients.
• Intelligent controller with backlit LCD display: simultaneous real-time monitoring of setpoint, chamber temperature, vacuum level, and elapsed time; menu-driven interface with password-protected parameter editing.
• Power-fail recovery function: automatically restores pre-interruption settings—including target temperature, vacuum setpoint, and timer status—upon grid restoration.
• Internal heating configuration with embedded tubular heaters; no moving parts or extractable shelves to preserve vacuum stability and thermal consistency.

Sample Compatibility & Compliance

The DZF-6500 accommodates diverse sample formats—including Petri dishes, desiccators, glass vials, ceramic crucibles, lithium-ion cathode/anode wafers, and bulk powder containers—without requiring modification to chamber geometry. Its inert-gas-compatible design supports ASTM E145-22 (Standard Specification for Gravity-Convection and Forced-Ventilation Ovens) and ISO 12775:2021 (Laboratory equipment — Vacuum drying ovens — Requirements and test methods). The sealed chamber meets baseline requirements for USP Sterilization and FDA 21 CFR Part 11 data integrity when paired with optional programmable controllers featuring audit trail logging. All electrical components comply with IEC 61010-1 safety standards for laboratory equipment.

Software & Data Management

While the standard DZF-6500 operates via standalone microcontroller firmware, optional multi-segment programmable temperature controllers (sold separately) provide RS485/Modbus RTU output for integration into centralized lab management systems. These controllers support up to 30 ramp-hold segments per program, user-defined vacuum hold phases, and timestamped event logging—including door opening, vacuum breach, over-temperature alarms, and power cycle events. Audit trail records are stored locally with write-protection and exportable via USB interface, satisfying basic traceability requirements under GLP Annex 11 and ISO/IEC 17025 Clause 7.7.

Applications

• Pharmaceutical: Residual solvent removal from APIs and excipients; low-temperature drying of lyophilized intermediates; sterilization of glassware and stainless-steel tools.
• Materials Science: Moisture evacuation from metal-organic frameworks (MOFs); binder burnout in green ceramic bodies; pre-drying of electrode slurries prior to calendaring.
• Environmental Testing: Gravimetric moisture content analysis per EPA Method 5035A; preparation of soil and sediment samples for TOC and heavy metal digestion.
• Academic Research: Dehydration of biological tissues for SEM sample prep; stabilization of nanomaterial dispersions; thermal aging studies under inert atmospheres.
• Quality Control Labs: Batch validation of desiccant performance; calibration of hygrometers and dew-point sensors using saturated salt solutions.

FAQ

What vacuum pump specifications are recommended for optimal performance with the DZF-6500?
For consistent attainment of ≤133 Pa, a two-stage rotary vane pump rated at ≥4 L/s displacement and equipped with a gas ballast valve is advised. Optional accessories include a 4 L/s vacuum pump (model VP-4000) and an inline gas–liquid separator to prevent oil backstreaming during volatile solvent drying.

Can the DZF-6500 be validated for IQ/OQ/PQ protocols?
Yes. The unit’s mechanical construction, temperature uniformity (±1°C), vacuum repeatability, and digital controller architecture support formal qualification. Calibration certificates for PT100 sensors and vacuum transducers are available upon request.

Is external heating available for this model?
No—the DZF-6500 uses internal heating exclusively. External heating variants exist in the DZF series (e.g., DZF-6210E), but are not offered for the 6500 chassis due to structural and thermal load constraints.

Does the chamber support positive-pressure inert gas purging?
The standard configuration includes a single inert gas inlet valve with needle valve control. Optional mass flow meters (0–10 L/min N₂ range) enable quantitative purging and dynamic atmosphere maintenance during heating cycles.