Zhongke Aobo DZF Series Vacuum Drying Oven

Overview

The Zhongke Aobo DZF Series Vacuum Drying Oven is an engineered solution for moisture-sensitive, heat-labile, or oxidation-prone sample processing in research laboratories, quality control environments, and small-scale production settings. Unlike conventional forced-air ovens, this vacuum drying system operates under reduced atmospheric pressure—typically down to ≤133 Pa—to lower the boiling point of solvents and water, enabling gentle dehydration at significantly lower temperatures. This principle prevents thermal degradation, preserves structural integrity of polymers, pharmaceutical actives, biological specimens, and nanomaterials, and eliminates oxidative side reactions. The DZF-6020AB model features a compact chamber (275 × 300 × 300 mm) constructed entirely from electropolished AISI 304 stainless steel, ensuring corrosion resistance, cleanability, and long-term dimensional stability under repeated thermal cycling and vacuum stress.

Key Features

• Stainless steel (AISI 304) chamber with seamless welded construction and passivated surface finish—compliant with ISO 14644-1 Class 8 cleanroom compatibility requirements for low-particulate environments.
• Adjustable high-temperature silicone door gasket with uniform compression design, validated to maintain ≤133 Pa vacuum over 24-hour continuous operation (per internal leak-rate testing per ASTM E493).
• Tempered double-glazed observation window with integrated anti-fog coating—provides unobstructed visual monitoring without compromising vacuum integrity or thermal insulation.
• Precision microprocessor-based PID temperature controller with digital LED display, ±0.1 °C setpoint resolution, and programmable ramp-soak profiles (up to 9 segments).
• Integrated safety architecture: independent over-temperature cut-off (mechanical backup), automatic power disconnection upon door opening, and real-time fault logging via non-volatile memory.
• Low-power consumption design (0.3 kW) optimized for benchtop integration—no external cooling water or compressed air required.

Sample Compatibility & Compliance

The DZF-6020AB accommodates standard laboratory glassware (e.g., weighing bottles, Petri dishes, crucibles) and custom fixtures up to 250 mm in height. It supports drying of powders, granules, thin films, lyophilized intermediates, ceramic precursors, and coated substrates without delamination or cracking. The chamber’s geometry minimizes thermal gradients, achieving ≤±1 °C temperature uniformity across the working volume (verified per ISO 17025-accredited calibration protocol). The unit complies with IEC 61010-1:2010 for electrical safety in laboratory equipment and meets CE marking requirements for electromagnetic compatibility (EN 61326-1) and low-voltage directive (2014/35/EU). While not certified for GMP manufacturing, its design supports GLP-compliant documentation workflows—including audit-ready temperature log export and user-accessible calibration constants.

Software & Data Management

The embedded controller supports RS-232 serial output for connection to external data loggers or SCADA systems. Optional PC software (sold separately) enables real-time graphing, CSV export of time-stamped temperature/vacuum traces, and password-protected user profile management. All temperature setpoints, dwell times, and alarm thresholds are stored with timestamped modification history—supporting traceability requirements aligned with FDA 21 CFR Part 11 Annex 11 principles when paired with validated third-party data acquisition platforms.

Applications

• Residual solvent removal from API intermediates prior to HPLC analysis (USP <467> compliant preparation).
• Drying of moisture-sensitive catalysts and battery electrode slurries without binder migration.
• Pre-conditioning of reference standards and certified reference materials (CRMs) for gravimetric analysis.
• Dehydration of botanical extracts and enzyme preparations where enzymatic activity must be retained.
• Outgassing of optical components and MEMS devices prior to hermetic sealing.
• Accelerated aging studies of polymer films under controlled humidity depletion conditions.

FAQ

What vacuum level can the DZF-6020AB achieve, and what pump is recommended?
The chamber reaches ≤133 Pa (≤1 Torr) using a standard two-stage rotary vane vacuum pump (e.g., 2–4 m³/h capacity, oil-sealed). For solvent-laden applications, a cold trap is advised to protect pump oil integrity.
Is the chamber pressure monitored digitally?
No—the DZF-6020AB does not include an integrated vacuum gauge. External analog or digital gauges (e.g., Pirani or capacitance manometers) must be connected via the standard KF-16 port.
Can the oven be used for inert-gas purging instead of vacuum?
Yes—by disconnecting the vacuum line and introducing nitrogen or argon through the vent valve, the chamber can operate as a purge oven for oxygen-sensitive processes.
What maintenance is required for long-term reliability?
Quarterly inspection of door gasket elasticity and cleaning of heater surface dust; annual verification of temperature sensor calibration against NIST-traceable reference; replacement of vacuum pump oil every 500 operating hours.
Does the unit support validation protocols such as IQ/OQ/PQ?
The hardware design permits full qualification—documentation templates for Installation Qualification (IQ) and Operational Qualification (OQ) are available upon request, including test scripts for temperature mapping, vacuum decay, and safety interlock verification.