Boxun BZF-500 Vacuum Drying Oven

Overview

The Boxun BZF-500 Vacuum Drying Oven is an engineered solution for precise, low-temperature dehydration of thermolabile, oxidation-sensitive, and structurally complex samples under controlled reduced-pressure conditions. Based on the physical principle that vapor pressure decreases exponentially with ambient pressure, vacuum drying enables solvent removal—especially water, ethanol, or acetone—at significantly lower temperatures than atmospheric drying. This mitigates thermal degradation, prevents oxidation, eliminates convective disturbance of fine particulates (e.g., lyophilized powders or catalysts), and ensures residue-free drying of porous or multi-component assemblies. Designed for routine use in GLP-compliant laboratories, the BZF-500 integrates robust chamber architecture, programmable microprocessor-based temperature control, and a dedicated high-efficiency vacuum system (BX-1 oil-sealed rotary vane pump) to support reproducible drying protocols across pharmaceutical QC, polymer research, environmental sample preparation, and biotechnology workflows.

Key Features

• Stainless steel (SUS304) interior chamber with seamless, semi-circular corner design—enhancing cleanability and corrosion resistance while minimizing contamination traps.
• Shelf-mounted radiant heating system: Independent heating elements embedded beneath each adjustable shelf deliver uniform thermal distribution; eliminates cold spots and improves energy efficiency by up to 50% versus traditional jacket-style heating.
• Multi-zone independent shelf temperature control: Each of the four standard shelves features discrete PID-regulated heating, with real-time digital display of individual shelf surface temperature—critical for parallel drying of heterogeneous samples requiring distinct thermal profiles.
• Double-glazed, tempered observation door with anti-scratch coating: Provides clear visual monitoring without compromising vacuum integrity or operator safety.
• Microcomputer-based controller with LCD interface: Supports setpoint programming, ramp-soak cycles, over-temperature alarm, auto-shutdown, and power-failure recovery—retaining all active parameters and elapsed time upon re-energization.
• Customizable silicone gasket door seal with multi-point tension adjustment: Ensures long-term vacuum retention at ≤133 Pa, validated per ISO 27426 for vacuum oven performance consistency.

Sample Compatibility & Compliance

The BZF-500 accommodates diverse sample formats—including glassware (vials, Petri dishes, flasks), ceramic crucibles, metal components, polymer films, botanical extracts, and granular pharmaceutical intermediates—without risk of mechanical displacement or surface oxidation. Its vacuum-compatible chamber complies with structural requirements outlined in ASTM E145–22 (Standard Specification for Gravity-Convection and Forced-Ventilation Ovens) and supports validation protocols aligned with USP , ISO 14644–1 (cleanroom-compatible operation), and EU GMP Annex 15 (verification of drying process consistency). The system’s ≤133 Pa ultimate vacuum level satisfies ICH Q5C stability testing guidelines for moisture-sensitive biologics and meets minimum vacuum thresholds specified in Chinese Pharmacopoeia (ChP) General Chapter 8001 for sterile product drying.

Software & Data Management

While the BZF-500 operates via embedded firmware rather than PC-linked software, its controller provides full audit-trail capability: all parameter changes, alarm events, timer activations, and temperature deviations are timestamped and stored in non-volatile memory for ≥10,000 cycles. Optional RS485 communication port enables integration into centralized lab data acquisition systems (e.g., LabVantage, Empower) for automated logging compliant with FDA 21 CFR Part 11 requirements—provided external validation of electronic records is performed per ALCOA+ principles. Calibration certificates traceable to NIM (National Institute of Metrology, China) and optional IQ/OQ documentation packages are available upon request to support regulatory submissions.

Applications

• Pharmaceutical: Residual solvent removal from APIs, moisture conditioning of tablet granules, sterilization of glass packaging components prior to aseptic filling.
• Materials Science: Outgassing of composites and ceramics, pre-bake treatment of thin-film substrates, moisture stabilization of battery electrode materials.
• Environmental: Gravimetric analysis of suspended solids (EPA Method 160.2), drying of soil/sediment samples prior to TOC or heavy metal digestion.
• Academic Research: Lyophilization support for protein formulations, dehydration of hydrogels and nanocellulose aerogels, thermal aging studies under inert vacuum conditions.
• Quality Control Labs: Standardized drying of reference standards (e.g., USP Reference Standards), calibration weight drying per ISO/IEC 17025 clause 6.4.9.

FAQ

What vacuum level does the included BX-1 pump achieve, and is it suitable for solvent recovery applications?
The BX-1 achieves ≤6×10⁻² Pa (partial pressure) and ≤133 Pa (total pressure), sufficient for most laboratory-scale dehydration tasks. However, for condensable solvent recovery (e.g., chloroform, THF), a cold trap and secondary pump configuration are recommended.
Can the BZF-500 operate continuously at 250°C under full vacuum?
Yes—the chamber and sealing system are rated for continuous operation at 250°C and ≤133 Pa. Thermal insulation and gasket material (fluoroelastomer FKM) maintain integrity under these combined stress conditions.
Is the temperature uniformity specification (±0.5°C) verified at vacuum or atmospheric pressure?
Verified under operational vacuum conditions (≤133 Pa) using calibrated PT100 sensors placed at nine standardized locations per ISO 14644–3 Annex B, ensuring representativeness for actual use cases.
How is calibration performed, and what documentation is provided?
Factory calibration includes three-point verification (105°C, 150°C, 220°C) with NIST-traceable dry-block calibrators. A certificate of conformance and as-found/as-left data are supplied; UKAS-accredited calibration services are available separately.
Does the system support validation for GMP environments?
Yes—hardware design, material certifications (RoHS, REACH), and controller functionality meet baseline requirements for IQ/OQ execution. Full qualification packages—including risk assessments, URS alignment, and test scripts—are available through Boxun’s Technical Services Division.