BOXUN BXK-30S Vacuum Drying Oven

Overview

The BOXUN BXK-30S Vacuum Drying Oven is an engineered solution for controlled, low-temperature moisture removal in thermally sensitive, oxidizable, or structurally complex samples. Operating on the principle of reduced-pressure evaporation—where lowering ambient pressure depresses the boiling point of volatile solvents—the BXK-30S enables efficient drying below conventional thermal thresholds. This physical principle eliminates thermal degradation risks associated with convection-based ovens and supports applications requiring strict oxygen exclusion, such as solvent recovery from pharmaceutical intermediates, residual moisture elimination in lyophilized biologicals, or inert-atmosphere curing of polymer precursors. Designed for ISO/IEC 17025-compliant laboratories and aligned with GLP documentation practices, the unit integrates vacuum integrity monitoring, programmable thermal profiles, and non-volatile parameter retention—ensuring traceability and repeatability across batch processing cycles.

Key Features

• Heated stainless-steel shelf system with distributed heating elements beneath the tray surface—enhancing thermal transfer efficiency by >50% compared to jacketed or wall-heated configurations, especially under high-vacuum conditions (≤133 Pa)
• Independent shelf temperature control with real-time digital display—enabling precise multi-layer thermal management and selective activation of heating zones to optimize energy use during partial-load operations
• Integrated noise-dampened cabinet housing a 2 L/s dual-stage rotary vane vacuum pump—reducing operational sound pressure level by up to 40 dB(A) versus external pump setups while preserving floor space and workflow continuity
• Electronically monitored vacuum regulation: built-in vacuum transducer provides continuous readout and automatic re-pumping upon detected pressure drift (e.g., due to sample outgassing or seal micro-leakage)
• Microprocessor-based PID temperature controller with LCD interface—supporting setpoint programming, ramp-soak profiles, over-temperature cut-off (±5°C safety margin), and power-failure recovery with non-volatile memory retention
• Chamber constructed from electropolished SUS304 stainless steel with radius-corner geometry—facilitating cleaning validation per FDA 21 CFR Part 11 and minimizing particle entrapment in GMP environments

Sample Compatibility & Compliance

The BXK-30S accommodates heterogeneous sample forms—including powders, granules, porous ceramics, coated substrates, and sterilized glassware—without displacement or aerosolization, owing to its static vacuum environment. Its 30 L chamber volume and 320 × 320 × 300 mm usable space support standard ISO 8573-1 Class 4 cleanroom-compatible accessories (e.g., borosilicate trays, PTFE-coated racks). The system meets structural requirements for ASTM E145-22 (Standard Specification for Gravity-Convection and Forced-Ventilation Ovens) and incorporates design elements consistent with IEC 61010-1:2010 for laboratory electrical equipment safety. Vacuum integrity verification protocols align with USP guidance on container closure integrity testing (CCIT) methodology.

Software & Data Management

While the BXK-30S operates via embedded firmware without external PC dependency, its controller logs timestamped event data—including vacuum pressure trends, temperature deviations, alarm triggers, and cycle completion status—into internal flash memory (retention ≥10 years). All parameters remain preserved during mains interruption and auto-resume upon power restoration. Optional RS485 Modbus RTU interface (available via accessory module) permits integration into centralized LabVantage or Thermo Fisher SampleManager LIMS platforms for audit-ready electronic records compliant with 21 CFR Part 11 Annex 11 requirements. Calibration certificates traceable to NIM (National Institute of Metrology, China) are provided with each unit shipment.

Applications

• Drying heat-labile APIs and excipients in pharmaceutical R&D and QC release testing
• Moisture content determination per AOAC 952.10 and ISO 5530-1 for food-grade starches and dairy powders
• Outgassing of optical components and MEMS devices prior to hermetic sealing
• Residual solvent removal from catalyst supports and battery electrode slurries
• Sterilization and depyrogenation of reusable labware under vacuum-assisted dry-heat conditions (validated at ≥160°C for 120 min)
• Pre-conditioning of hygroscopic reference standards prior to gravimetric analysis

FAQ

What vacuum level can the BXK-30S achieve, and how is it maintained?
The system achieves and holds ≤133 Pa using its integrated 2 L/s dual-stage rotary vane pump. A built-in piezoresistive vacuum sensor continuously monitors chamber pressure and initiates automatic re-pumping if deviation exceeds user-defined thresholds.
Is the temperature uniformity validated across the entire chamber volume?
Yes—temperature uniformity of ±0.5°C is specified at the center of the shelf under steady-state vacuum conditions (≤200 Pa) and verified per ASTM E145-22 Annex A4 using nine calibrated PT100 probes.
Can multiple shelves be added or retrofitted?
The BXK-30S is configured with one factory-installed heated shelf featuring independent thermal control. Additional shelves are not supported due to power budget and thermal crosstalk constraints inherent in the sealed cabinet architecture.
Does the unit comply with electromagnetic compatibility (EMC) directives for laboratory deployment?
It conforms to IEC 61326-1:2021 for laboratory equipment, including radiated emissions (CISPR 11 Group 1, Class B) and electrostatic discharge immunity (IEC 61000-4-2, Level 3).
How is calibration performed, and what documentation is supplied?
Each unit ships with a factory calibration report covering temperature accuracy (at 100°C and 200°C), vacuum sensor linearity (50–133 Pa), and timer deviation (<±0.1%). NIST-traceable calibration services are available through authorized BOXUN service centers.