Boxun BZF-50 Vacuum Drying Oven
| Brand | Boxun |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | BZF-50 |
| Instrument Type | Vacuum Oven |
| Temperature Range | Ambient +2°C to 250°C |
| Temperature Uniformity | ±0.5°C |
| External Dimensions | 575 × 550 × 675 mm |
| Internal Chamber Dimensions | 415 × 370 × 345 mm |
| Chamber Material | Stainless Steel (SUS304) |
| Heating Method | Bottom-Mounted Heated Shelving System |
| Vacuum Level | ≤133 Pa |
| Timer Range | 0–9999 min |
| Power Supply | 220 V ±10%, 50/60 Hz |
| Rated Power | 900 W |
| Net Capacity | 50 L |
Overview
The Boxun BZF-50 Vacuum Drying Oven is an engineered solution for controlled, low-temperature dehydration of thermally sensitive, oxidation-prone, or structurally complex samples. Operating on the principle of reduced-pressure drying—where ambient pressure is lowered to depress the boiling point of volatile components—the BZF-50 enables efficient moisture removal without thermal degradation. Unlike forced-air convection ovens, this system eliminates convective disturbance, making it ideal for powders, granular materials, porous components, and sterilizable glassware. Its design adheres to fundamental requirements for laboratory-grade vacuum thermal processing: stable temperature maintenance under dynamic vacuum conditions, minimal thermal gradient across the chamber, and repeatable vacuum integrity. The unit is intended for routine use in research laboratories, quality control environments, and pilot-scale preparation workflows where ISO/IEC 17025-aligned documentation practices are maintained.
Key Features
- Stainless steel (SUS304) interior chamber with radius-rounded corners for enhanced cleanability and corrosion resistance
- Double-layer tempered safety glass door with adjustable silicone gasket compression for reliable vacuum sealing up to ≤133 Pa
- Microprocessor-based PID temperature controller with LCD interface, supporting setpoint programming, real-time monitoring, over-temperature alarm, and power-failure recovery memory
- Distributed bottom-mounted heating elements beneath each shelf—enabling uniform heat flux delivery and eliminating hot-spot formation
- Independent temperature sensing and display per shelf level, supporting multi-tiered sample processing with synchronized thermal profiles
- Energy-optimized operation: selective activation of individual heated shelves reduces power consumption during low-sample-load cycles
- Cold-rolled steel outer casing with electrostatic epoxy coating for mechanical durability and chemical resistance
Sample Compatibility & Compliance
The BZF-50 accommodates a broad spectrum of sample formats—including Petri dishes, weighing boats, crucibles, vials, and disassembled mechanical assemblies—without risk of displacement or cross-contamination. Its vacuum-compatible chamber supports drying of hygroscopic salts, lyophilized biological matrices, polymer precursors, catalyst substrates, and pre-sterilized labware. While not certified as Class II biological safety equipment, the oven meets general-purpose laboratory safety standards (IEC 61010-1) and is compatible with GLP-compliant documentation when paired with external data loggers. It supports traceable process validation under ASTM E2500 and ISO 14644-1 cleanroom-adjacent workflows, provided vacuum pump exhaust is routed externally per local ventilation codes.
Software & Data Management
The BZF-50 operates via embedded firmware without proprietary PC software dependency. All operational parameters—including set temperature, elapsed time, vacuum status, and alarm history—are retained in non-volatile memory. For audit-ready environments, users may integrate third-party USB or RS-485 data loggers compliant with FDA 21 CFR Part 11 requirements (electronic signatures, audit trails, user access controls). The timer function supports extended unattended runs up to 166.6 hours, with automatic termination and audible alert. No cloud connectivity or remote diagnostics are included; all configuration remains local and deterministic—ensuring reproducibility in regulated settings.
Applications
- Drying of heat-labile pharmaceutical intermediates and excipients prior to HPLC analysis
- Dehydration of enzyme preparations, microbial cultures, and tissue sections without denaturation
- Removal of residual solvents from thin-film coatings and nanomaterial dispersions
- Conditioning of reference standards and calibration weights in metrology labs
- Sterilization support for glass pipettes, syringes, and filtration apparatus under vacuum-assisted dry-heat protocols
- Preparation of anhydrous reagents for organometallic synthesis where oxygen exclusion is critical
- Moisture content determination per ISO 5517 and AOAC 950.46 methodologies
FAQ
What vacuum pump is recommended for optimal performance with the BZF-50?
A two-stage rotary vane pump capable of achieving ≤10 Pa base pressure is advised; typical configurations include models with ≥4 m³/h pumping speed and hydrocarbon-free oil or dry scroll alternatives for solvent-rich applications.
Can the BZF-50 be used for inert-gas purging?
Yes—via optional inlet valve retrofit, nitrogen or argon can be introduced post-evacuation to maintain an inert atmosphere during cooling or storage phases.
Is the temperature uniformity specification validated at full vacuum?
Yes—uniformity of ±0.5°C is verified at 100°C under 133 Pa vacuum using NIST-traceable thermocouples placed at nine standardized locations per IEC 60068-3-5.
Does the unit support programmable ramp-soak cycles?
No—this model implements single-setpoint temperature control only; multi-step profiles require external programmable controllers.
What maintenance intervals are recommended for long-term reliability?
Silicone door gasket inspection every 6 months; vacuum gauge calibration annually; heating element continuity check during biannual preventive maintenance.
